JP2006102189A - Blood pressure measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood pressure measuring device and its controlling method by which highly precise blood pressure measurement can be done while utilizing the respective characteristics of Korotkoff method, a pressure pulse wave method, and a photoelectric pulse wave method, and covering its drawbacks. <P>SOLUTION: The blood pressure measuring device has a pressurizing section capable of increasing and decreasing a pressurizing force against a subject, a photoelectric pulse wave detecting section, a cuff detecting section detecting the pressure pulse wave, a microphone detecting Korotkoff sounds, and a controlling section increasing and decreasing the pressurizing force of the pressurizing section and commanding the operation of the photoelectric pulse wave detecting section, the cuff detecting section, and the microphone. The controlling section makes at least the two of the photoelectric pulse wave detecting section, the cuff detecting section, and microphone detect objects to be detected in the process where the controlling section make the photoelectric pulse wave detecting section detect the pulse wave, calculates a pressure reducing quantity per unit time base on the detected pulse wave, reduces the pressure according to the pressure reducing quantity per unit time from the predetermined pressurizing force in the pressurizing section, and makes the pressurizing section reduce the pressure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blood pressure measurement apparatus that measures a blood pressure by changing a pulse wave by compressing a subject.

  With the aging of society, dealing with adult lifestyle-related diseases has become a major social issue. It is recognized that long-term blood pressure data collection is very important, especially for diseases related to high blood pressure. From this point of view, various biological information measuring devices including blood pressure have been developed.

  2. Description of the Related Art Conventionally, there is a patient monitor device that is inserted into the ear canal and is always worn as a device that measures biological information at the outer ear portion (see, for example, Patent Document 1). This can be calculated from the amount of received light of the scattered light of infrared light and visible light that radiates the pulse, pulse wave, electrocardiogram, body temperature, arterial blood oxygen saturation, blood pressure, etc. into the living body.

  Moreover, as an apparatus to be mounted on the ear canal, there is an emergency information apparatus that includes wireless communication means and includes an arterial blood oxygen saturation sensor, a body temperature sensor, an electrocardiogram sensor, and a pulse wave sensor (see, for example, Patent Document 2). ).

  On the other hand, with regard to blood pressure measurement, a blood pressure measurement device based on a blood vessel pulsation waveform by light is a blood pressure measurement device using other methods such as a cuff vibration method or a volume compensation method (for example, see Non-Patent Documents 1 and 2). In parallel, it is recognized as a powerful blood pressure measurement method.

  Furthermore, in recent years, attention has been focused on the fact that the viscosity of blood is closely related to the health state of a living body, and various studies have been carried out (for example, see Non-Patent Document 3).

  In the present specification, the names of the outer ears are based on Non-Patent Documents 4 and 5.

JP-A-9-128203 JP-A-11-128174 Kenichi Yamakoshi, Tatsuo Togawa, “Biosensor and Measuring Device”, MM Japan Society / ME textbook series A-1, pages 39-52 Osamu Tochikubo, “Measurement method and clinical evaluation of blood pressure”, Medical Tribune Co., Ltd. Motohara Sugawara, Shinji Maeda, “Rheology and Blood Flow of Blood”, MM Society of Japan / ME Textbook Series B-7, pp. 72-75 Sobotta Illustrated Human Anatomy Volume 1 (Translation by Michio Okamoto), p. 126, Medical School, issued October 1, 1996 The Atlas of Human Body, p. 20, Kodansha Co., Ltd., published on January 29, 2004, 35th edition

  There are mainly three methods for measuring blood pressure. First, a method of measuring blood pressure by detecting a Korotkoff sound generated when blood begins to flow intermittently in accordance with the heartbeat by using an electronic component such as a microphone (Korotkoff method), and second, a heart A method of measuring the blood pressure by detecting the pressure pulse wave due to the vibration of the blood vessel wall synchronized with the heartbeat (pressure pulse wave method), and third, the expansion of the blood vessel wall synchronized with the heartbeat This is a method (photoelectric pulse wave method) for measuring blood pressure by detecting expansion and contraction with a light emitting element and a light receiving element. Of the above three measurement methods, the Korotkoff method is now the standard measurement method for blood pressure measurement.

  However, the Korotkoff method uses a microphone and is vulnerable to noise from surrounding sounds. For example, when blood pressure is measured at a relatively small living body part such as the tragus of the outer ear, the blood wave at the part is thin, so that the obtained sound wave signal is weak and noise is likely to be mixed during signal amplification. Furthermore, since a sound wave signal cannot be obtained unless the living body is pressed, the measurement result may be influenced by the pressing state of the living body.

  In addition, the pressure pulse wave method detects the pressure in the cuff, and thus is resistant to noise caused by ambient light and sound. However, since a pulse wave in a wide range of blood vessels is detected, the pulse wave detection accuracy may deteriorate when a pulse wave in a narrow part is targeted. Similarly to the Korotkoff method, the cuff pressure does not change unless the living body is pressed, and therefore the measurement result may be influenced by the pressing state of the living body.

  On the other hand, the photoelectric pulse wave method is strong against noise caused by ambient sound, although it is weak against noise caused by ambient light. Further, the pulse wave can be detected without pressing the living body. Furthermore, there is an advantage that the pulse wave can be measured in a limited minute portion.

  Further, since the above three methods are different in detection method, a difference occurs in measurement results.

  Accordingly, an object of the present invention is to provide a blood pressure measuring device and a control method thereof capable of measuring blood pressure with higher accuracy while compensating for the respective drawbacks of the Korotkoff method, pressure pulse wave method, and photoelectric pulse wave method. And

  In order to solve the above problems, the present inventors decided to combine at least two methods among the Korotkoff method, the pressure pulse wave method, and the photoelectric pulse wave method.

  Specifically, the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject, and a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject; A blood pressure measuring device comprising: a control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit; A pulse detecting unit that detects a pulse wave, calculates a reduced pressure amount per unit time from a product of a pulse rate per unit time obtained from the detected pulse wave and a predetermined reduced pressure amount per beat, and the pressing unit In accordance with the amount of pressure reduction per unit time from a predetermined pressing force, In the process for decompressing the serial pressing portion, characterized in that to detect the pulse wave in the photoelectric pulse wave detector and the pressure pulse wave detecting unit.

  By determining the depressurization rate based on the photoelectric pulse wave, the blood pressure can be measured at an appropriate depressurization rate according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Furthermore, two types of blood pressure results can be obtained by the pressure pulse wave method and the photoelectric pulse wave method, and the validity of the measurement results can be judged. Therefore, blood pressure can be measured with high accuracy.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a sound wave detection unit that detects Korotkoff sound from the subject, and a pressing force of the pressing unit A blood pressure measuring device that increases and decreases and controls the operation of the photoelectric pulse wave detection unit and the sound wave detection unit, wherein the control unit causes the photoelectric pulse wave detection unit to detect a pulse wave, The amount of pressure reduction per unit time is calculated from the product of the pulse rate per unit time obtained from the detected pulse wave and a predetermined amount of pressure reduction per beat, and a predetermined pressing force is applied to the pressing portion per unit time. The pressure is reduced according to the pressure reduction amount of In process of pressure, characterized in that to detect the Korotkoff sounds pulse wave and the acoustic wave detection unit from detecting the photoelectric pulse wave detector.

  By determining the depressurization rate based on the photoelectric pulse wave, the blood pressure can be measured at an appropriate depressurization rate according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Furthermore, two types of blood pressure results can be obtained by the photoelectric pulse wave method and the Korotkoff method, and the validity of the measurement results can be judged. Therefore, blood pressure can be measured with high accuracy.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and the subject A sound wave detection unit that detects Korotkoff sounds from the specimen, a control unit that increases or decreases the pressing force of the pressing unit, and instructs the operation of the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit; The control unit causes the photoelectric pulse wave detection unit to detect a pulse wave, the pulse rate per unit time obtained from the detected pulse wave, and a predetermined amount of decompression per beat The amount of pressure reduction per unit time is calculated from the product of In the process of depressurizing according to the depressurization amount per unit time from a predetermined pressing force and depressurizing the pressing unit, the photoelectric pulse wave detecting unit and the pressure pulse wave detecting unit detect a pulse wave and the sound wave detecting unit It is characterized by detecting Korotkoff sounds.

  By determining the depressurization rate based on the photoelectric pulse wave, the blood pressure can be measured at an appropriate depressurization rate according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Furthermore, three types of blood pressure results can be obtained by the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method, and the validity of the measurement results can be judged. Therefore, blood pressure can be measured with high accuracy.

  In addition, the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject, and the pressing A blood pressure measuring apparatus comprising: a control unit that increases or decreases a pressing force of the unit and instructs the detection of the pulse wave information detection unit, wherein the pulse wave information detection unit emits light to the subject And a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element, and a surface of the subject It has at least two detection units among a pressure pulse wave detection unit that detects a pulse wave from vibration and a sound wave detection unit that detects a Korotkoff sound from the subject, and the control unit has the at least two detections Based on each detected value Absolute value of the difference between the systolic blood pressure value or the lowest blood pressure value determined Te is and outputs an error signal when greater than a predetermined value.

  By outputting an error signal when the difference between the results obtained by at least two methods of the photoelectric pulse wave method, the pressure pulse wave method, or the Korotkoff method is larger than a predetermined value, noise is measured during blood pressure measurement by each method. It is possible to judge the validity of measurement results, such as the possibility of contamination. Therefore, it is possible to make a judgment such as re-measurement.

  In addition, the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject, and the pressing A blood pressure measuring apparatus comprising: a control unit that increases or decreases a pressing force of the unit and instructs the detection of the pulse wave information detection unit, wherein the pulse wave information detection unit emits light to the subject And a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element, and a surface of the subject It has at least two detection units among a pressure pulse wave detection unit that detects a pulse wave from vibration and a sound wave detection unit that detects a Korotkoff sound from the subject, and the control unit has the at least two detections Based on each detected value And calculates an average value of the systolic blood pressure value or diastolic blood pressure is determined Te.

  By taking the average value of the measurement results obtained by at least two methods of the photoelectric pulse wave method, the pressure pulse wave method, or the Korotkoff method, the error in the measurement results by each method is compensated, and a more appropriate blood pressure value is obtained. Obtainable.

  In addition, the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject, and the pressing A blood pressure measuring apparatus comprising: a control unit that increases or decreases a pressing force of the unit and instructs the detection of the pulse wave information detection unit, wherein the pulse wave information detection unit emits light to the subject And a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element, and a surface of the subject A pressure pulse wave detection unit that detects a pulse wave from vibration; and a sound wave detection unit that detects a Korotkoff sound from the subject; the control unit includes the photoelectric pulse wave detection unit and the pressure pulse wave detection And the detected values detected by the sound wave detection unit. And selects a median value of the systolic blood pressure value or diastolic blood pressure is determined Te.

  By taking an intermediate value of the measurement results obtained by the three methods of the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method, the error of the measurement result by each method is compensated, and a more appropriate blood pressure value is obtained. Can do. Here, the “intermediate value” refers to a value in the middle of the three values.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and the press A blood pressure measuring device comprising: a control unit that increases or decreases the pressing force of the unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit, wherein the control unit is a pressing force by the pressing unit The maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit during the decompression process is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit Sometimes, a warning is output.

  When the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit is smaller than a predetermined value, the detection sensitivity of the pressure pulse wave detection unit may be low or the subject may be insufficiently compressed, By the warning, measures such as increasing the detection sensitivity of the pressure pulse wave detection unit or prompting the user to reattach the blood pressure measurement device can be taken. In addition, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary by a warning. It is also possible to determine whether or not the subject needs to be remeasured based on the measurement result after the warning.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a sound wave detection unit that detects Korotkoff sound in the subject, and a pressing force of the pressing unit A blood pressure measuring device that increases and decreases and instructs the operation of the photoelectric pulse wave detection unit and the sound wave detection unit, wherein the control unit is configured to reduce the sound wave in the process of reducing the pressing force by the pressing unit. A warning is output when the maximum value of the detection signal intensity of the detection unit is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit. .

  When the detection signal intensity of the sound wave detection unit is smaller than a predetermined value, the detection sensitivity of the sound wave detection unit may be low or the compression of the subject may be insufficient. It is possible to take measures such as raising the blood pressure or prompting the user to reattach the blood pressure measuring device. In addition, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary by a warning. It is also possible to determine whether or not the subject needs to be remeasured based on the measurement result after the warning.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and the subject A sound wave detection unit that detects Korotkoff sounds from the specimen, a control unit that increases or decreases the pressing force of the pressing unit, and instructs the operation of the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit; The control unit includes: a maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit in the process of reducing the pressing force by the pressing unit; and a reduction of the pressing force by the pressing unit. In the process, the maximum value of the detection signal intensity of the sound wave detection unit is the pressing value. When less than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detector of the front press by part, and outputs a warning.

  When the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit is smaller than a predetermined value or when the maximum value of the detection signal intensity of the sound wave detection unit is smaller than a predetermined value, the pressure pulse wave detection unit and the sound wave detection unit The detection sensitivity of the pressure pulse wave detection unit and the sound wave detection unit may be increased by warning, or the blood pressure measurement device may be reattached. Measures can be taken. In addition, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary by a warning. It is also possible to determine whether or not the subject needs to be remeasured based on the measurement result after the warning.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a sound wave detection unit that detects Korotkoff sound from the subject, and a pressing force of the pressing unit A blood pressure measuring device that increases and decreases and instructs the operation of the photoelectric pulse wave detection unit and the sound wave detection unit, wherein the control unit is in a process of reducing pressure from a predetermined pressing force by the pressing unit. A pressing force that causes the photoelectric pulse wave detection unit to detect a pulse wave and the sound wave detection unit to detect a Korotkoff sound, and starts detecting a rising point of an envelope of a pulse wave waveform detected by the photoelectric pulse wave detection unit; The Korotkoff sound is generated by the sound wave detection unit. Whether the absolute value of the difference between the pressing force to start extraction is greater than a predetermined value or the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears and the pulse wave waveform detected by the photoelectric pulse wave detection unit It is characterized in that it is determined whether or not the absolute value of the difference from the pressing force that is an inflection point of the envelope curve is greater than a predetermined value when the slope of the envelope curve is negative.

  Whether the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound is greater than a predetermined value Or, the difference between the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the photoelectric pulse wave detection unit is negative and becomes the inflection point of the envelope If the absolute value is larger than the predetermined value, it is estimated that the viscosity of the blood is high. Therefore, in this case, it can be notified that the viscosity of blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the Korotkoff sound starts to be detected by the sound wave detection unit or the sound wave The absolute value of the difference between the pressing force at which the Korotkoff sound detected by the detector disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the photoelectric pulse detector is negative and becomes the inflection point of the envelope If is larger than the predetermined value, the measurement result may not be valid. In this case, processing such as remeasurement can be performed.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and a Korotkoff from the subject. A blood pressure measurement apparatus comprising: a sound wave detection unit that detects a sound; and a control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the pressure pulse wave detection unit and the sound wave detection unit. The unit operates the pressure pulse wave detection unit and the sound wave detection unit in the process of depressurization from a predetermined pressing force by the pressing unit, and the rising point of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit Whether the absolute value of the difference between the pressing force at which the sound wave detection unit starts to detect and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound is larger than a predetermined value, or the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears And the pulse wave detected by the pressure pulse wave detector The inclination of the envelope absolute value of the difference between the pressing force becomes an inflection point of the negatively and the envelope, characterized in that determining whether greater than a predetermined value.

  Whether the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit starts to be detected and the pressing force at which the Kotokoff sound starts to be detected by the sound wave detection unit is greater than a predetermined value Or, the difference between the pressing force at which the Korotkoff sound detected by the sound wave detecting unit disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the pressure pulse wave detecting unit is negative and becomes the inflection point of the envelope If the absolute value is larger than the predetermined value, it is estimated that the viscosity of the blood is high. Therefore, in this case, it can be notified that the viscosity of blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value or sound wave of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the pressure pulse wave detector starts to be detected and the pressing force at which the sound wave detector starts to detect the Korotkoff sound Absolute value of the difference between the pressing force at which the Korotkoff sound detected by the detector disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the pressure pulse wave detector is negative and becomes the inflection point of the envelope If is larger than the predetermined value, the measurement result may not be valid. In this case, processing such as remeasurement can be performed.

  The blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates the subject with light, and light that has passed through the subject out of the light from the light emitting element. Alternatively, a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered inside the subject, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and the press A control unit that increases or decreases the pressing force of the unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit, wherein the control unit is a predetermined unit by the pressing unit. In the depressurization process from the pressing force, the photoelectric pulse wave detection unit and the pressure pulse wave detection unit detect the pulse wave, and start detecting the rising point of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit The rise of the envelope of the pressure wave and the pulse wave waveform detected by the pressure pulse wave detector Whether the absolute value of the difference from the pressing force at which to start detecting a point is greater than a predetermined value, or the slope of the envelope of the pulse waveform detected by the photoelectric pulse wave detector is negative and the envelope The absolute value of the difference between the pressing force that becomes the inflection point and the pressing force that becomes the inflection point of the envelope is negative when the slope of the envelope of the pulse wave detected by the pressure pulse wave detector is negative It is characterized by judging whether it is larger than.

  A pressing force that starts to detect the rising point of the envelope of the pulse waveform detected by the photoelectric pulse wave detector, and a pressing force that starts to detect the rising point of the envelope of the pulse waveform detected by the pressure pulse wave detector; Waveform of the pulse wave detected by the pressure and pressure pulse wave detectors with the absolute value of the difference between them or the inclination of the envelope of the pulse wave detected by the photoelectric pulse wave detector being negative and the inflection point of the envelope If the slope of the envelope is negative and the absolute value of the difference from the pressing force that is the inflection point of the envelope is larger than the predetermined value, the measurement result may be invalid. In this case, processing such as remeasurement can be performed.

  In the blood pressure measurement device, it is desirable that the subject is an outer ear of a living body and / or its surroundings. More preferably, the subject is the external ear canal and / or pinna of the living body. More preferably, the subject is a living tragus and / or its periphery.

  By mounting the blood pressure measuring device in a small size on the outer ear, blood pressure can be measured continuously in daily life and without being affected by noise due to movement of the human body.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject, and a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject; A method for controlling a blood pressure measurement device comprising: a photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before pressing by the pressing unit; and a pulse detected by the photoelectric pulse wave detection procedure A decompression amount calculation procedure for calculating a decompression amount per unit time from a product of a pulse rate per unit time obtained from the wave and a predetermined decompression amount per beat, and the unit time calculated in the decompression amount calculation procedure According to the pressure reduction amount per hit, While vacuum from the constant pressing force, characterized in that it comprises a detection procedure for detecting a pulse wave in the photoelectric pulse wave detector and the pressure pulse wave detecting unit.

  By determining the decompression speed by the decompression amount calculation procedure, the blood pressure can be measured at an appropriate decompression speed according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Furthermore, two types of blood pressure measurement results can be obtained by the pressure pulse wave method and the photoelectric pulse wave method according to the detection procedure, and the validity of the measurement results can be determined. Therefore, blood pressure can be measured with high accuracy.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. Blood pressure measurement comprising: a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject; and a sound wave detection unit that detects Korotkoff sound from the subject A method for controlling an apparatus, comprising: a photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before being pressed by the pressing unit; and a unit obtained from the pulse wave detected by the photoelectric pulse wave detection procedure According to the decompression amount calculation procedure for calculating the decompression amount per time from the product of the pulse rate per time and the predetermined decompression amount per beat, and the decompression amount per unit time calculated in the decompression amount calculation procedure, A predetermined push on the pressing portion While reduced pressure force, characterized in that it comprises a detection procedure for detecting the Korotkoff sound and the acoustic wave detection unit to detect a pulse wave in the photoelectric pulse wave detector.

  By determining the decompression speed by the decompression amount calculation procedure, the blood pressure can be measured at an appropriate decompression speed according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Furthermore, two types of blood pressure measurement results can be obtained by the photoelectric pulse wave method and the Korotkoff method according to the detection procedure, and the validity of the measurement results can be determined. Therefore, blood pressure can be measured with high accuracy.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the object, and a pressure pulse wave detection unit that measures a pulse wave from vibration of the surface of the object; A blood pressure measurement device comprising: a sound wave detection unit that detects Korotkoff sounds from the subject; a photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before being pressed by the pressing unit; A decompression amount calculating procedure for calculating a decompression amount per time from a product of a pulse rate per unit time obtained from the pulse wave detected by the photoelectric pulse wave detection procedure and a predetermined decompression amount per beat, and The unit time calculated in the decompression amount calculation procedure Detection that causes the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave and causes the sound wave detection unit to detect Korotkoff sound while reducing the pressure from a predetermined pressing force to the pressing unit according to the amount of pressure reduction And a procedure.

  By determining the decompression speed by the decompression amount calculation procedure, the blood pressure can be measured at an appropriate decompression speed according to the pulse rate of the subject, so that the blood pressure can be accurately measured in a short time. Moreover, since the blood pressure measurement time is also changed every measurement, the blood pressure can be measured efficiently. Furthermore, three types of blood pressure measurement results can be obtained by the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method according to the detection procedure, and the validity of the measurement results can be determined. Therefore, blood pressure can be measured with higher accuracy.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, and a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject. The pulse wave information detecting means includes: a light emitting element that irradiates light to the subject; and light transmitted through the subject out of light from the light emitting element or inside the subject. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered by the light source, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and a Korotkoff sound from the subject. A detection procedure that includes at least two detection units among the sound wave detection units to detect, and causes the at least two detection units to detect respective detection targets while reducing the pressure from a predetermined pressing force to the pressing units, After the detection procedure, And an error output procedure for outputting an error signal when the absolute value of the difference between the systolic blood pressure value or the diastolic blood pressure value determined based on the respective detection values obtained from the two detection units is larger than a predetermined value. It is characterized by that.

  After the detection procedure, by outputting an error signal when the absolute value of the difference between the results obtained by at least two methods of the photoelectric pulse wave method, the pressure pulse wave method or the Korotkoff method is larger than a predetermined value, It is possible to determine the validity of the measurement result, such as the possibility of noise being mixed during blood pressure measurement by each method. Therefore, it is possible to make a judgment such as re-measurement.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, and a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject. The pulse wave information detecting means includes: a light emitting element that irradiates light to the subject; and light transmitted through the subject out of light from the light emitting element or inside the subject. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered by the light source, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and a Korotkoff sound from the subject. A detection procedure that includes at least two detection units among the sound wave detection units to detect, and causes the at least two detection units to detect respective detection targets while reducing the pressure from a predetermined pressing force to the pressing units, After the detection procedure, Both characterized in that it comprises a, an average value calculation step of calculating an average value of the systolic blood pressure value or diastolic blood pressure is determined based on the respective detection values obtained from the two detector.

  After the detection procedure, by taking the average value of the results obtained by at least two methods of photoelectric pulse wave method, pressure pulse wave method or Korotkoff method, the error of the measurement result by each method is compensated, and the validity A certain blood pressure value can be obtained.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, and a pulse wave information detection unit that detects information related to the pulse wave of the subject from the outside of the subject. The pulse wave information detecting means includes: a light emitting element that irradiates light to the subject; and light transmitted through the subject out of light from the light emitting element or inside the subject. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives light scattered by the light source, a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject, and a Korotkoff sound from the subject. A detection procedure for detecting at least two detection units to detect each detection target while reducing the pressure from a predetermined pressing force to the pressing unit, and after the detection procedure, Pulse wave detector, pressure pulse wave detector , An intermediate value selection procedure for selecting an intermediate value of the fine the systolic blood is determined based on the respective detection values obtained from the acoustic wave detection unit or the minimum blood pressure value, characterized in that it comprises a.

  After the detection procedure, by taking an intermediate value of the results obtained by the three methods of the photoelectric pulse wave method, the pressure pulse wave method and the Korotkoff method, the error in the measurement results by each method is compensated and more appropriate. Blood pressure values can be obtained.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject, and a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject; A detection procedure for causing the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave while reducing the pressing force by the pressing unit, and the detection procedure When the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit, A warning output procedure for outputting a warning.

  In the warning output procedure, when the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit is smaller than a predetermined value, the detection sensitivity of the pressure pulse wave detection unit may be low, or the subject may be insufficiently compressed There is sex. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the pressure pulse wave detection unit or prompting the user to reattach the blood pressure measurement device. Further, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on a warning made in the warning output procedure. Moreover, it can also be judged from the measurement result after warning that a remeasurement is necessary in the subject.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. Blood pressure measurement comprising: a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject; and a sound wave detection unit that detects Korotkoff sound from the subject A method for controlling the apparatus, comprising: a detection procedure in which the photoelectric pulse wave detection unit detects a pulse wave and the sound wave detection unit detects a Korotkoff sound while reducing the pressing force by the pressing unit; and A warning output that outputs a warning when the maximum value of the detection signal intensity of the sound wave detection unit is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit Procedures, and To.

  In the warning output procedure, when the maximum value of the detection signal intensity of the sound wave detection unit is smaller than a predetermined value, the detection sensitivity of the sound wave detection unit may be low, or the subject may be insufficiently compressed. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the sound wave detection unit or prompting the user to reattach the blood pressure measurement device. Further, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on a warning given in the warning output procedure. Moreover, it can also be judged that a remeasurement is required from the measurement result after warning in the subject.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject, and a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject; And a sound wave detecting unit for detecting a Korotkoff sound from the subject, the photoelectric pulse wave detecting unit and the pressure pulse wave while reducing the pressing force by the pressing unit A detection procedure for causing the detection unit to detect a pulse wave and for the sound wave detection unit to detect a Korotkoff sound; and a maximum amplitude intensity of a detected pulse wave of the pressure pulse wave detection unit in the detection procedure or The maximum value of the detected signal intensity is When prior to the smaller than the predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detector of, characterized in that it comprises a and a warning output procedure to output a warning.

  In the warning output procedure, when the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit is smaller than a predetermined value or the maximum value of the detection signal intensity of the sound wave detection unit is smaller than a predetermined value, the pressure pulse wave detection There is a possibility that the detection sensitivity of the part or the sound wave detection part is low, or the compression of the subject is insufficient. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the pressure pulse wave detection unit or the sound wave detection unit, or prompting the user to reattach the blood pressure measurement device. Further, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on a warning made in the warning output procedure. Moreover, it can also be judged from the measurement result after warning that a remeasurement is necessary in the subject.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. Blood pressure measurement comprising: a photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject; and a sound wave detection unit that detects Korotkoff sound from the subject In the control method of the apparatus, in the detection procedure, the photoelectric pulse wave detection unit detects a pulse wave and the sound wave detection unit detects a Korotkoff sound while reducing the pressing force by the pressing unit. The absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound is greater than a predetermined value. Whether it is too big or not A pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears, and a pressing force at which the slope of the envelope of the pulse waveform detected by the photoelectric pulse wave detection unit is negative and becomes an inflection point of the envelope And a determination procedure for determining whether or not the absolute value of the difference is greater than a predetermined value.

  Whether the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound is greater than a predetermined value Or, the difference between the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the photoelectric pulse wave detection unit is negative and becomes the inflection point of the envelope If the absolute value is larger than the predetermined value, it is estimated that the viscosity of the blood is high. Therefore, in the determination procedure, the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound or Absolute difference between the pressing force at which the Korotkoff sound detected by the sound wave detector disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the photoelectric pulse detector is negative and becomes the inflection point of the envelope When the value is larger than the predetermined value, it can be notified that the viscosity of the blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the Korotkoff sound starts to be detected by the sound wave detection unit or the sound wave The absolute value of the difference between the pressing force at which the Korotkoff sound detected by the detector disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the photoelectric pulse detector is negative and becomes the inflection point of the envelope If is larger than the predetermined value, the measurement result may not be valid. In this case, it is possible to perform processing such as performing remeasurement after the determination procedure.

  Further, the control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a pressure pulse wave detecting unit that detects a pulse wave from vibration of the surface of the subject, and the subject A blood pressure measurement device comprising: a sound wave detection unit for detecting a Korotkoff sound from the pressure pulse wave by causing the pressure pulse wave detection unit to detect a pulse wave and reducing the pressure force by the pressure unit. A detection procedure for detecting a Korotkoff sound by the detection unit; and a pulse detected by the pressure pulse wave detection unit by causing the pressure pulse wave detection unit to detect a pulse wave and causing the sound wave detection unit to detect a Korotkoff sound in the detection procedure. Whether the absolute value of the difference between the pressing force at which the rising point of the envelope of the wave waveform starts to be detected and the pressing force at which the Korotkoff sound starts to be detected by the sound wave detection unit is greater than a predetermined value, or the sound wave detection unit Detecting the Korotoko The absolute value of the difference between the pressing force at which the sound disappears and the pressing force that becomes the inflection point of the envelope is negative and the slope of the envelope of the pulse waveform detected by the pressure pulse wave detection unit is negative And a determination procedure for determining whether or not is larger.

  Whether the absolute value of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit starts to be detected and the pressing force at which the Kotokoff sound starts to be detected by the sound wave detection unit is greater than a predetermined value Or, the difference between the pressing force at which the Korotkoff sound detected by the sound wave detecting unit disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the pressure pulse wave detecting unit is negative and becomes the inflection point of the envelope If the absolute value is larger than the predetermined value, it is estimated that the viscosity of the blood is high. Therefore, in the determination procedure, the absolute value of the difference between the pressing force at which the rising point of the envelope of the pulse wave waveform detected by the pressure pulse wave detecting unit starts to be detected and the pressing force at which the sound wave detecting unit starts to detect the Korotkoff sound or Absolute difference between the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the pressure pulse wave detection unit is negative and becomes the inflection point of the envelope When the value is larger than the predetermined value, it can be notified that the viscosity of the blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value or sound wave of the difference between the pressing force at which the rising edge of the envelope of the pulse wave waveform detected by the pressure pulse wave detector starts to be detected and the pressing force at which the sound wave detector starts to detect the Korotkoff sound Absolute value of the difference between the pressing force at which the Korotkoff sound detected by the detector disappears and the pressing force at which the slope of the envelope of the pulse wave detected by the pressure pulse wave detector is negative and becomes the inflection point of the envelope If is larger than the predetermined value, the measurement result may not be valid. In this case, it is possible to perform processing such as performing remeasurement after the determination procedure.

  The control method of the blood pressure measurement device according to the present invention includes a pressing unit that can increase or decrease the pressing force on the subject, a light emitting element that irradiates light to the subject, and the subject out of the light from the light emitting element. A photoelectric pulse wave detection unit that detects a pulse wave with a light receiving element that receives transmitted light or light scattered inside the subject, and a pressure pulse wave detection unit that detects a pulse wave from vibration of the surface of the subject; A detection procedure for causing the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave while reducing the pressing force by the pressing unit, and the detection procedure The pressure pulse and the pressure pulse wave detection unit and the pressure pulse wave detection unit detect the pulse wave and start detecting the rising point of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit Rise of the envelope of the pulse waveform detected by the wave detector Whether the absolute value of the difference from the pressing force at which the detection starts is greater than a predetermined value, or the slope of the envelope of the pulse waveform detected by the photoelectric pulse wave detector is negative and the inflection of the envelope The absolute value of the difference between the pressing force that becomes the point and the inclination of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit is negative and the pressing force that becomes the inflection point of the envelope is larger than a predetermined value Including a determination procedure for determining whether or not.

  A pressing force that starts to detect the rising point of the envelope of the pulse waveform detected by the photoelectric pulse wave detector, and a pressing force that starts to detect the rising point of the envelope of the pulse waveform detected by the pressure pulse wave detector; The absolute value of the difference between the pulse waves detected by the photoelectric pulse wave detection unit and the pulse wave waveform detected by the pressure pulse wave detection unit and the pressing force serving as the inflection point of the envelope are negative. If the slope of the envelope of the waveform is negative and the absolute value of the difference from the pressing force that becomes the inflection point of the envelope is larger than the predetermined value, the measurement result may not be valid. . In this case, it is possible to perform processing such as performing remeasurement after the determination procedure.

  In the control method of the blood pressure measurement device, it is preferable that the subject is a part of the outer ear of a living body. More preferably, the subject is the external ear canal and / or pinna of the living body. More preferably, the subject is a living tragus and / or its periphery.

  By mounting the blood pressure measuring device in a small size on the outer ear, blood pressure can be measured continuously in daily life and without being affected by noise due to movement of the human body.

  The blood pressure measurement device and the control method thereof according to the present invention make it possible to measure blood pressure with higher accuracy by making use of the features of the Korotkoff method, the pressure pulse wave method, and the photoelectric pulse wave method while compensating for the drawbacks.

  Hereinafter, the present invention will be described in detail with reference to embodiments, but the present invention is not limited to the following embodiments.

  FIG. 1 shows a schematic view when the blood pressure measurement device according to the present embodiment is attached to a tragus of a living body outer ear as a subject.

  The blood pressure measurement device 60 according to the present embodiment includes a pneumatic cuff 20 as a pressing unit that can increase or decrease the pressing force 53 to the tragus 5 as a subject, a light emitting element 25b that irradiates the tragus 5 with light, and light emission. A photoelectric pulse wave detection unit 25 that detects a pulse wave with a light receiving element 25a that receives light transmitted through the tragus 5 among light from the element 25b, and a pressure pulse wave that detects a pulse wave from vibration of the surface of the tragus 5 A cuff pressure detector 51 as a detection unit, a microphone 21 as a sound wave detection unit for detecting a Korotkoff sound in the tragus 5, a pressing force 53 of a pneumatic cuff 20, and a photoelectric pulse wave detection unit 25, a cuff And a control unit 46 that instructs the operation of the pressure detector 51 and the microphone 21. A pneumatic cuff 20, a photoelectric pulse wave detection unit 25, and a microphone 21 are arranged on the U-shaped body 31. In the present embodiment, in addition to the above, an air pump 52 for increasing or decreasing the cuff pressure inside the pneumatic cuff 20, and a memory that stores detection results of the light receiving element 25 a, the microphone 21, and the cuff pressure detector 51. 45.

  In this embodiment, the photoelectric pulse wave detection unit 25, the cuff pressure detector 51 as a pressure pulse wave detection unit, and the microphone 21 as a sound wave detection unit are provided. However, in the present embodiment, the photoelectric pulse wave detection unit 25, only the photoelectric pulse wave detector 25 and the microphone 21 are included, and only the cuff pressure detector 51 and the microphone 21 are included.

  The U-shaped body 31 has a clip structure made of an elastic body, for example, and can hold the tragus 5 as a subject. The U-shaped body 31 only needs to hold the tragus 5. For example, two members may be coupled via a coil spring to sandwich the tragus 5.

  In this embodiment, the pneumatic cuff 20 is applied as the pressing portion. The pneumatic cuff 20 includes a casing 29 having one surface opened, a bag body 30 formed of an elastic member having a pressing surface 32 formed on the side of the one surface having the casing 29 opened, and air inside the bag body 30. And an air supply pipe 23 for supplying the air. And by supplying air from the air supply pipe 23, the cuff pressure, which is the pressure inside the bag body 30, rises and the pressing surface 32 protrudes, so that the tragus 5 as the subject can be pressed.

  Here, the non-expandable member is applied to the housing 29 so as not to be deformed due to an increase in the cuff pressure. For example, a non-stretchable member such as plastic or metal can be applied. Moreover, elastic members, such as rubber | gum and a polyethylene film, can be applied to the elastic member used as the bag body 30. FIG. These members have good adhesion to the tragus 5 as the subject and do not damage the tragus 5. In the present embodiment, the pneumatic cuff 20 is applied as the pressing portion. However, if the tragus 5 as the subject can be pressed, for example, the piston is moved up and down by pressure such as water pressure, hydraulic pressure, or air pressure. The tragus 5 may be pressed, or the tragus 5 may be pressed by an electronic component such as a piezoelectric element that expands and contracts when a voltage is applied.

  The photoelectric pulse wave detection unit 25 includes a light emitting element 25 b disposed inside the bag body 30 and a light receiving element 25 a disposed on the surface of the U-shaped body 31 on the side opposite to the pneumatic cuff 20. The light emitting element 25b irradiates the tragus 5 as the subject with the irradiation light 49, and the light receiving element 25a receives the transmitted light 47 transmitted through the tragus 5. Here, the light receiving element 25 a is preferably arranged at a position perpendicular to the pressing surface 32 from the center of the pressing surface 32. When the light receiving element 25a is arranged at this position, it is possible to detect a pulse wave in a region where the pressure portion of the tragus 5 is equal pressure, thereby enabling highly accurate blood pressure measurement. On the other hand, the light emitting element 25b may be disposed at any position as long as the transmitted light 47 transmitted through the tragus 5 is received by the light receiving element 25a. The principle of photoelectric pulse wave detection will be described later.

  In the present embodiment, the cuff pressure detector 51 is applied as the pressure pulse wave detector. The cuff pressure detector 51 can detect the cuff pressure that is the pressure inside the bag body 30 based on the pressure transmitted by the pressure transmission pipe 19 connected to the bag body 30. The pressure pulse wave detection principle will be described later.

  In the present embodiment, the microphone 21 is applied as the sound wave detection unit. As the microphone 21, an electrodynamic type, an electrostatic type, and a piezoelectric type microphone can be applied depending on the conversion method. The microphone 21 detects the Korotkoff sound generated from the tragus 5 when the tragus 5 as the subject is pressed or decompressed by the pneumatic cuff 20 as the pressing portion. The principle of Korotkoff sound generation will be described later.

  The control unit 46 controls the operation of the pneumatic cuff 20 as the pressing unit, the photoelectric pulse wave detection unit 25, the cuff pressure detector 51 as the pressure pulse wave detection unit, and the microphone 21 as the sound wave detection unit. Specifically, the air pump 52 is instructed to supply air via the instruction wiring 41f, and the cuff pressure detector 51 instructs the detection of the cuff pressure, which is the pressure inside the bag 30, via the instruction wiring 41e. By doing so, the cuff pressure is adjusted to a predetermined pressure. Further, the cuff pressure detected by the cuff pressure detector 51 can be stored in the memory 45. In addition, an operation is instructed to the microphone 21 via the instruction wiring 41 c at a predetermined time to detect the Korotkoff sound from the tragus 5 as the subject, and the detection result is stored in the memory 45. Further, at a predetermined time, the light emitting element 25b of the photoelectric pulse wave detector 25 is instructed to emit light through the instruction wiring 41d, and the light receiving element 25a is instructed to receive light through the instruction wiring 41b. Then, the photoelectric signal received by the light receiving element 25 a can be stored in the memory 45.

  Here, FIG. 2 shows a schematic configuration diagram of another embodiment of the blood pressure measurement device 60. The same reference numerals as in FIG. 1 are used to omit the description. In the present embodiment, the arrangement positions of the light emitting element 25b and the light receiving element 25a and the configuration of the pressure pulse wave detection unit are different from those shown in FIG.

  In the present embodiment, both the light emitting element 25 b and the light receiving element 25 a are disposed inside the bag body 30. The light emitting element 25b irradiates the tragus 5 as the subject with the irradiation light 49, and the light receiving element 25a receives the scattered light 48 scattered inside the tragus 5. Here, the light receiving element 25 a is preferably arranged at the center of the pressing surface 32. When the light receiving element 25a is arranged at this position, it is possible to detect a pulse wave in a region where the pressure portion of the tragus 5 is equal pressure, thereby enabling highly accurate blood pressure measurement. On the other hand, the light emitting element 25b may be arranged at any position as long as the scattered light 48 scattered inside the tragus 5 is received by the light receiving element 25a. The principle of photoelectric pulse wave detection will be described later.

  In the present embodiment, the piezoelectric element 22 is applied as the pressure pulse wave detection unit. The piezoelectric element 22 is an element that generates a voltage according to pressure. Therefore, if the pressure from the tragus 5 as the subject is applied to the piezoelectric element 22, the pressure can be detected by a voltage corresponding to the pressure, so that the vibration state of the surface of the tragus 5 can be detected. . In this case, the cuff pressure detector 51 does not need to detect a pressure pulse due to a change in the cuff pressure, but the cuff pressure detector 51 also detects the pressure pulse and compares the detection value with the piezoelectric element 22 for accuracy. You may make it raise.

  The light emitting element 25b, the light receiving element 25a, and the piezoelectric element 22 are connected to the control unit 46 via the instruction wires 41d, 41c, and 41a, respectively. The light emitting element 25b starts to emit light according to an operation instruction from the control unit 46 via the instruction wiring 41d, and the light receiving element 25a starts to receive light according to an operation instruction from the control unit 46 via the instruction wiring 41c. Further, the piezoelectric element 22 starts detecting pressure in response to an operation instruction from the control unit 46 via the instruction wiring 41a. The control unit 46 can also store the photoelectric signal received by the light receiving element 25 a and the detection signal detected by the piezoelectric element 22 in the memory 45.

  Here, the respective principles of the detection principle of the photoelectric pulse wave, the detection principle of the pressure pulse wave, and the generation principle of the Korotkoff sound will be described with reference to FIGS. FIG. 3 shows respective results obtained by measuring photoelectric pulse waves, pressure pulse waves, and Korotkoff sounds in the depressurization process by pressing the tragus 5 as the subject shown in FIG. In FIG. 3, the one-point difference line shows the cuff pressure 38 as the pressing force, and each graph shows the detection result of the photoelectric pulse waveform 35, the pressure pulse waveform 36 and the Korotkoff sound waveform 37 from the top. The dotted lines on the photoelectric pulse waveform 35 and the pressure pulse waveform 36 indicate envelopes 54 and 55 of the photoelectric pulse waveform 35 and the pressure pulse waveform 36, respectively. The horizontal axis on the left side indicates the cuff pressure (mmhg), and the vertical axis on the right side indicates the signal amplitude corresponding to the detection result of the photoelectric pulse wave and the pressure pulse wave. Note that only the occurrence or disappearance of the Korotkoff sound is detected.

  First, the principle of photoelectric pulse wave detection will be described. First, the irradiation light 49 applied to the tragus 5 of the light emitting element 25b shown in FIG. 1 is scattered by the blood cell 3 flowing through the blood vessel 2 to the peripheral side of the tragus 5 indicated by an arrow. The light receiving element 25 a receives the transmitted light 47 transmitted through the tragus 5 among the light scattered by the blood cell 3. Here, since the speed of the blood cell 3 is accompanied by a speed change according to the heartbeat, the transmission amount of the transmitted light 47 changes. Therefore, the photoelectric pulse wave as the flow velocity of the blood cell 3 can be detected by receiving the transmitted light 47 by the light receiving element 25 a and calculating the transmission amount change of the transmitted light 47 by the control unit 46. Since the light receiving element 25a receives the transmitted light 47 and detects the pulse wave, the pulse wave detection method is referred to as a transmission photoelectric pulse wave method.

  In the form shown in FIG. 2, the irradiation light 49 irradiating the tragus 5 of the light emitting element 25b shown in FIG. 2 is scattered by the blood cell 3 flowing through the blood vessel 2 to the peripheral side of the tragus 5 indicated by the arrow. Of the light scattered by the blood cell 3, the light receiving element 25a receives the scattered light 48 reflected by the tragus 5. Here, since the speed of the blood cell 3 is accompanied by a speed change according to the heartbeat, the amount of the scattered light 48 received by the light receiving element 25a changes. Therefore, the photoelectric pulse wave as the flow velocity of the blood cell 3 can be detected by receiving the scattered light 48 by the light receiving element 25a and calculating the amount of received light of the scattered light 48 by the control unit 46. In addition, since the light receiving element 25a receives the scattered light 48 reflected by the blood cell 3 of the tragus 5 and detects a pulse wave, the pulse wave detection method is referred to as a reflective photoelectric pulse wave method.

  Here, the tragus 5 as the subject is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then the cuff pressure, which is the pressure inside the bag body 30, is reduced. Then, as shown in FIG. 3, when the pressure is below a certain cuff pressure, a photoelectric pulse waveform 35 is generated. This time is T11, and the cuff pressure 38 at that time is P11. When the pressure is further reduced, the flow rate of the blood flow changes, and accordingly, the amount of light received by the light receiving element 25a also changes. In the case of this embodiment, the intensity of the detected pulse wave increases as the change in the blood flow velocity increases. When a certain cuff pressure is reached, the pulse wave value is maximized. When the cuff pressure 38 is further decreased, the photoelectric pulse waveform 35 starts to decrease. After that, the envelope 54 of the photoelectric pulse waveform 35 is inflected, and the photoelectric pulse waveform 35 decreases substantially abruptly. This time is T21, and the cuff pressure 38 at that time is P21. The blood pressure value can be calculated with P11 as a value corresponding to the highest blood pressure and P21 as a value corresponding to the lowest blood pressure.

  Next, the principle of detection of the pressure pulse wave will be described. First, the tragus 5 is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then the cuff pressure, which is the pressure inside the bag body 30, is reduced. Then, when it becomes below a certain value, blood begins to flow. Since the blood vessel 2 is pressed, the blood flows in the pressed narrow area. Therefore, the pressure of blood flow temporarily increases to push up the surface of the tragus 5, and the surface of the tragus 5 pushes down the surface of the pressing surface 32. This amount of depression affects the cuff pressure and temporarily increases the cuff pressure. By detecting the amount of pressure increase by the cuff pressure detector 51, the pressure pulse wave as the cuff pressure can be detected. This pulse wave detection method is referred to as a pressure pulse wave method.

  When the piezoelectric element 22 shown in FIG. 2 is applied to the detection of the pressure pulse wave, first, the tragus 5 as the subject is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then The cuff pressure that is the pressure inside the bag body 30 is reduced. Then, when it becomes below a certain value, blood begins to flow. Since the blood vessel 2 is pressed, the blood flows in the pressed narrow area. Therefore, the blood pressure increases temporarily and pushes up the surface of the tragus 5. By detecting the pressure due to the pushing up by the piezoelectric element 22, it is possible to detect the pressure pulse wave as the pressure on the surface of the tragus 5. This pulse wave detection method is also referred to as a pressure pulse wave method.

  Here, the tragus 5 is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then the cuff pressure is reduced. Then, as shown in FIG. 3, when the cuff pressure 38 falls below a certain pressure, a pressure pulse waveform 36 is generated. This time is T12, and the cuff pressure 38 at that time is P12. Further, when the pressure is further reduced, the flow rate of the blood flow gradually increases, and the push-up amount on the surface of the blood vessel 2 shown in FIG. 1 also increases. For this reason, the pressure pulse wave detected as the push-up amount increases. When a certain cuff pressure is reached, the detected pulse wave value is maximized. Thereafter, when the pressure is further reduced, the blood vessel 2 expands and at the same time the elasticity of the blood vessel 2 increases, so that the detected value of the pressure pulse waveform 36 starts to decrease. Thereafter, the envelope 55 of the pressure pulse waveform 36 is inflected, and the pressure pulse waveform 36 decreases substantially suddenly. When the cuff pressure 38 falls below the minimum blood pressure value, the elastic modulus of the blood vessel 2 further increases and the pulse wave disappears. The time at this time is T22, and the cuff pressure 38 at that time is P22. The blood pressure value can be calculated with P12 as a value corresponding to the maximum blood pressure and P22 as a value corresponding to the minimum blood pressure.

  Next, the principle of generating Korotkoff sounds will be described. First, the tragus 5 as the subject is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then the cuff pressure, which is the pressure inside the bag body 30, is reduced. Then, when the cuff pressure falls below a certain value, blood begins to flow. Since the blood vessel 2 is pressed, the blood flows in the pressed narrow area. Therefore, the blood pressure increases temporarily, and the blood vessel wall of the tragus 5 collides with the blood cell 3. The collision sound of the blood cell 3 is a Korotkoff sound.

  Here, the tragus 5 is pressed by the pneumatic cuff 20 shown in FIG. 1 until the blood flow stops, and then the cuff pressure, which is the pressure inside the bag 30, is reduced. Then, as shown in FIG. 3, when the cuff pressure 38 becomes a certain pressure or lower, a Korotkoff sound waveform 37 is generated. This time is T13, and the cuff pressure 38 at that time is P13. Thereafter, when the pressure is reduced, the blood vessel 2 expands, and the collision sound between the blood vessel wall 3 and the blood cell 3 is absorbed by the elastic force due to an increase in the elasticity of the blood vessel 2. Therefore, the Korotkoff sound disappears. The time at this time is T23, and the cuff pressure at that time is P23. The blood pressure value can be calculated with P13 as a value corresponding to the highest blood pressure and P23 as a value corresponding to the lowest blood pressure. A method for calculating blood pressure using Korotkoff sounds is called Korotkoff method.

  Here, as shown in FIG. 3, the photoelectric pulse wave, the pressure pulse wave, and the Korotkoff sound generation time and disappearance time tend to vary due to differences in detection methods. FIG. 3 shows an example in which the waveform is generated in the order of photoelectric pulse wave, pressure pulse wave, and Korotkoff sound. However, the waveform is not necessarily as shown in FIG. It is influenced by values related to blood flow such as blood flow.

  Therefore, an error is included in the blood pressure value obtained from the generation time and disappearance time of the photoelectric pulse wave, pressure pulse wave, and Korotkoff sound. In addition, since the pulse rate varies depending on the subject, the cycle of the pulse wave also varies. Therefore, in this embodiment, the control unit 46 shown in FIG. 1 causes the photoelectric pulse wave detection unit 25 to detect a pulse wave, and obtains a pulse rate per unit time obtained from the detected pulse wave and a predetermined per beat. In the process of calculating the amount of decompression per unit time from the product of the amount of decompression and depressurizing the pneumatic cuff 20 according to the amount of decompression per unit time from a predetermined pressing force, the photoelectric pulse wave detection in the process of depressurizing to the pneumatic cuff 20 And at least two of the cuff pressure detector 51 as the pressure pulse wave detector and the microphone 21 as the sound wave detector. That is, the photoelectric pulse wave detector 25 detects the photoelectric pulse wave, the cuff pressure detector 51 detects the pressure pulse wave, and the microphone 21 detects the Korotkoff sound.

  Here, the predetermined pressing force is, for example, 100 mmhg or more as shown in FIG. 3, but considering the burden on the tragus, the pressing force when the pulse wave stops (= cuff pressure) is predetermined. It is good to use a pressing force.

  Thus, by determining the decompression speed based on the photoelectric pulse wave, the blood pressure can be measured at an appropriate decompression speed in accordance with the pulse rate of the subject, so that the blood pressure can be measured accurately in a short time. . Furthermore, the blood pressure result can be obtained by at least two methods of the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method, and the validity of the measurement result can be judged. Therefore, blood pressure can be measured with high accuracy. Further, when the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 are provided as in the present embodiment, three types of blood pressure results are further obtained by the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method. It is possible to obtain blood pressure measurement with higher accuracy.

  In addition, when the difference in cuff pressure (the difference between P11, P12, and P13, the difference between P21, P22, and P23) shown in FIG. 3 is remarkably large, the blood pressure measurement result may not be valid. is there. Therefore, in the present embodiment, the control unit 46 shown in FIG. 1 causes at least two of the photoelectric pulse wave detection unit 25, the cuff pressure detector 51 as the pressure pulse wave detection unit, or the microphone 21 as the sound wave detection unit to detect. When the difference between the maximum blood pressure value or the minimum blood pressure value determined based on each detected value is larger than a predetermined value, an error signal is output.

  Each method by outputting an error signal when the difference between the results obtained by at least two methods out of the photoelectric pulse wave method, the pressure pulse wave method and the Korotkoff method as the pulse wave information detection means is larger than a predetermined value. This makes it possible to judge the validity of measurement results, such as the possibility of noise being mixed during blood pressure measurement. Therefore, it is possible to make a judgment such as re-measurement.

  When the detected value detected by at least two methods among the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method is valid, the control unit 46 includes the photoelectric pulse wave detection unit 25, the pressure pulse wave detection, and the like. An average value of the maximum blood pressure value or the minimum blood pressure value determined based on the respective detected values detected by at least two of the cuff pressure detector 51 as the unit or the microphone 21 as the sound wave detection unit is calculated.

  By taking the average value of the results obtained by at least two of the photoelectric pulse wave method, the pressure pulse wave method and the Korotkoff method as pulse wave information detection means, the error in the measurement result by each method is compensated and more appropriate. A blood pressure value can be obtained.

  Further, as in the present embodiment, when the photoelectric pulse wave detection unit 25, the cuff pressure detector 51 as the pressure pulse wave detection unit, or the three microphones 21 as the sound wave detection units are provided, the control unit 46 is Select an intermediate value between the systolic blood pressure value or the systolic blood pressure value determined based on the detected value detected by the photoelectric pulse wave detecting unit 25, the cuff pressure detector 51 as the pressure pulse wave detecting unit, and the microphone 21 as the sound wave detecting unit. To include.

  By taking an intermediate value of the results obtained by the three methods of photoelectric pulse wave method, pressure pulse wave method and Korotkoff method as pulse wave information detection means, the error of the measurement result by each method is compensated and more appropriate A certain blood pressure value can be obtained.

  Further, since the photoelectric pulse wave method can detect the photoelectric pulse wave of the tragus 5 without being affected by the pressing state of the tragus 5 as the subject by the pressing surface 32 shown in FIG. The validity of the blood pressure measurement by the pressure pulse wave method and the Korotkoff method can also be examined by the relationship between the amplitude intensity of the wave waveform and the amplitude intensity of the waveform of the detection signal by another method. Therefore, in the blood pressure measurement device 60 of the present embodiment, the control unit 46 detects the detected pulse wave in the cuff pressure detector 51 as the pressure pulse wave detection unit in the process of reducing the pressing force 53 by the pneumatic cuff 20 as the pressing unit. The maximum value of the detection signal intensity in the microphone 21 as the sound wave detection unit in the process of reducing the pressing force 53 by the pneumatic cuff 20 is the maximum value of the amplitude amplitude of the photoelectric pulse wave detection unit 25 before being pressed by the pneumatic cuff 20. When it is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave, a warning is output.

  Further, when the photoelectric pulse wave detector 25, the cuff pressure detector 51, or the microphone 21 are all provided as in the present embodiment, the control unit 46 is configured to reduce the pressing force 53 by the pneumatic cuff 20 as a pressing unit. The maximum value of the amplitude intensity of the detected pulse wave in the cuff pressure detector 51 in the depressurization process and the maximum value of the detection signal intensity in the microphone 21 in the depressurization process of the pressing force 53 by the pneumatic cuff 20 are before pressing by the pneumatic cuff 20. A warning is output when the value is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detector 25. Here, the maximum value of the pressure pulse amplitude intensity means the amplitude intensity when the Korotkoff sound waveform 37 is generated in the vicinity of 30 seconds of the pressure pulse waveform 36 shown in FIG. 3, and the predetermined value indicates the photoelectric intensity shown in FIG. This is a predetermined value determined based on the amplitude intensity when the pulse waveform 35 converges to a constant value after 60 seconds. For example, in FIG. 3, the electrical noise level around 20 seconds when the pulse wave disappears in FIG. The value obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the pressure pulse waveform 36 may be a value equal to or smaller than the amplitude value of the pressure pulse waveform 36 at time T12. Setting is only an example. Further, for example, in FIG. 3, it is obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the pressure pulse waveform 36 at or above the electrical noise level near 20 seconds when the Korotkoff sound disappears. Although it may be set to a value equal to or smaller than the amplitude value of the Korotkoff sound waveform 37 at time T13, the setting of the predetermined value is only an example.

  When the maximum value of the amplitude intensity of the detected pulse wave of the cuff pressure detector 51 shown in FIG. 1 is smaller than a predetermined value or the maximum value of the detection signal intensity of the microphone 21 is smaller than a predetermined value, the detection sensitivity of the microphone 21 is high. Since it may be low or the compression of the tragus 5 may be insufficient, the warning increases the detection sensitivity of the cuff pressure detector 51 or the microphone 21 or prompts the blood pressure measuring device 60 to be remounted. Measures can be taken. In addition, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary by a warning. It is also possible to determine whether or not the subject needs to be remeasured based on the measurement result after the warning.

  Moreover, blood pressure measurement by the Korotkoff method is affected by the viscosity of blood. That is, when the viscosity of the blood is high, the Reynolds number of the blood becomes small, and the flow gradually shifts from turbulent flow to laminar flow. The Reynolds number is also related to the tube diameter of the blood vessel, and the Reynolds number decreases as the tube diameter decreases. Blood viscosity and blood vessel tube diameter have the same effect on Reynolds number, but blood viscosity does not change significantly, and blood flow is almost turbulent in relatively thick blood vessels such as arms. . However, as in this embodiment, the diameter of the blood vessel 2 is extremely small in a relatively small living body such as the tragus 5 of the outer ear shown in FIG. Therefore, the influence on the Reynolds number is large, and the amount of change in the Reynolds number due to a change in blood viscosity is large.

  The Korotkoff sound is generated when a blood cell collides with a blood vessel wall when the blood flow is turbulent. Therefore, when the blood flow becomes a laminar flow, Korotkoff sounds are not generated. Therefore, when the blood viscosity is high, the Korotkoff sound generation time (T13 in FIG. 3) is further delayed from the time shown in FIG. Further, when the pressure is further reduced, the blood vessel diameter is expanded and the flow velocity is decreased. Therefore, the turbulent state becomes weak, and the Korotkoff sound disappearance time (T23 in FIG. 3) is advanced from the time shown in FIG.

  Therefore, in the blood pressure measurement device 60 of the present embodiment, the control unit 46 shown in FIG. 1 detects the pulse wave in the photoelectric pulse wave detection unit 25 in the process of depressurization from a predetermined pressing force by the pneumatic cuff 20 as the pressing unit. In addition, the microphone 21 as the sound wave detection unit detects Korotkoff sound, and the pressure 21 starts to detect the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detection unit 25 and the Korotkoff sound is detected by the microphone 21. Whether the absolute value of the difference from the pressing force 53 to be detected is larger than a predetermined value or the waveform of the pulse wave detected by the photoelectric pulse wave detection unit 25 and the pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears. It is determined whether the slope of the envelope 54 is negative and the absolute value of the difference from the pressing force that is the inflection point of the envelope 54 is greater than a predetermined value. Note that the pressing force 53 at which the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is the cuff pressure at time T21 in FIG. Corresponds to P21.

  The absolute value of the difference between the pressing force 53 that starts detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detecting unit 25 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21 is greater than a predetermined value. Or the pressure 53 at which the Korotkoff sound detected by the microphone 21 disappears and the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is obtained. When the absolute value of the difference from the pressing force 53 is larger than a predetermined value, it is estimated that the viscosity of the blood is high. Therefore, in this case, it can be notified that the viscosity of blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the difference between the pressing force 53 that starts detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detecting unit 25 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21 or the microphone The pressing force 53 at which the Korotkoff sound detected at 21 disappears and the pressing force 53 at which the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and becomes the inflection point of the envelope 54 If the difference is large compared to the predetermined value, the measurement result may not be valid. In this case, processing such as remeasurement can be performed.

  Further, in the blood pressure measurement device 60 of the present embodiment, the control unit 46 detects the cuff pressure detector 51 as the pressure pulse wave detection unit and the sound wave detection in the depressurization process from the predetermined pressing force by the pneumatic cuff 20 as the pressing unit. The pressing force 53 that starts detecting the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21 are activated. Whether the absolute value of the difference is larger than a predetermined value or the slope of the envelope 55 of the waveform of the pulse wave detected by the pressure 53 and the cuff pressure detector 51 where the Korotkoff sound detected by the microphone 21 disappears and It is determined whether or not the absolute value of the difference from the pressing force 53 that is the inflection point of the envelope 55 is greater than a predetermined value. It should be noted that the pressing force 53 at which the slope of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 is negative and the inflection point of the envelope 55 is the cuff pressure P22 at time T22 in FIG. Corresponding to

  The absolute value of the difference between the pressing force 53 that starts detecting the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21 is greater than a predetermined value. The pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears or the envelope 55 of the waveform of the pulse wave detected by the cuff pressure detector 51 is negative and becomes the inflection point of the envelope 55 When the difference from 53 is larger than a predetermined value, it is estimated that the viscosity of blood is high. Therefore, in this case, it can be notified that the viscosity of blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value of the difference between the pressing force at which the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 starts to be detected and the pressing force 53 at which the Korotkoff sound starts to be detected by the microphone 21 or The pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears, and the pressing force 53 at which the inclination of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 is negative and becomes the inflection point of the envelope 55. If the absolute value of the difference is larger than the predetermined value, the measurement result may not be valid. In this case, processing such as remeasurement can be performed.

  Further, in the blood pressure measurement device 60 of the present embodiment, the control unit 46 includes the photoelectric pulse wave detection unit 25 and the cuffs as the pressure pulse wave detection unit in a depressurization process from a predetermined pressing force by the pneumatic cuff 20 as the pressing unit. The pulse wave is detected by the pressure detector 51 and the cuff pressure detector 51 detects the pulse wave detected by the pressure pulse detector 51 and starts detecting the rising point of the envelope 54 of the pulse wave waveform detected by the photoelectric pulse wave detector 25. Whether the absolute value of the difference from the pressing force 53 at which the rising point of the waveform envelope 55 starts to be detected is greater than a predetermined value or the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 Is negative and the pressure 53 becomes the inflection point of the envelope 54 and the inclination 55 of the pulse waveform detected by the cuff pressure detector 51 is negative and the pressure 55 becomes the inflection point of the envelope 55 It is determined whether or not the absolute value of the difference from 53 is larger than a predetermined value. Note that the pressing force 53 at which the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is the cuff pressure at time T21 in FIG. Corresponds to P21. Further, the pressing force 53 at which the slope of the envelope 55 of the pulse waveform detected by the cuff pressure detector 51 is negative and the inflection point of the envelope 55 is the cuff pressure P22 at time T22 in FIG. Corresponding to

  The rising point of the envelope 53 of the pulse waveform detected by the pressing force 53 and the cuff pressure detector 51 which starts detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is detected. The absolute value of the difference from the starting pressing force 53 or the detection of the pressing force 53 and the cuff pressure at which the slope of the envelope 54 of the waveform of the pulse wave detected by the photoelectric pulse wave detector 25 is negative and becomes the inflection point of the envelope 54 When the slope of the envelope 55 of the pulse wave waveform detected by the detector 51 is negative and the absolute value of the difference from the pressing force 53 that is the inflection point of the envelope 55 is larger than the predetermined value, measurement is performed. The result may not be valid. In this case, processing such as remeasurement can be performed.

  Here, the schematic which showed another form of the blood-pressure measuring apparatus in FIG. 4 is shown. FIG. 4 is a schematic diagram when the blood pressure measurement device according to the present embodiment is attached to the outer ear of a living body as a subject and / or the periphery thereof. FIG. 4A shows an example of a state in which the blood pressure measurement device according to this embodiment is attached to the outer ear. FIG. 4B shows an enlarged schematic cut surface at the AA ′ portion of the outer ear and the holding portion shown in FIG.

  The blood pressure measurement device 80 according to the present embodiment shown in FIG. 4B supplies air to the pneumatic cuff 20 and the support portion 24 arranged so as to sandwich the tragus 5 of the outer ear 9 and the inside of the bag body 30. The air supply pipe 23 and the holding part 28 for fixing the pneumatic cuff 20 and the support part 24 to the outer ear 9. As shown in FIG. 4A, the part to be attached to the outer ear 9 of the blood pressure measurement device 80 according to this embodiment is mounted on the holding unit 28. In addition to the above, in order to function as a blood pressure measurement device, a cuff pressure detector (not shown) that measures the pressure inside the pneumatic cuff 20 is provided, and the cuff pressure detector and the pneumatic cuff 20 The pressure transmission pipe 19 which connects is provided.

  As shown in FIG. 4 (A), the holding portion 28 is in contact with the outer ring leg 7 of the outer ear 9 from the pair of rings 6 and 8 and as shown in FIG. 4 (B). And molded into a shape along the tragus 5, and can be stably attached to the outer ear 9. Further, the holding portion 28 is provided with a cavity 27 as a voice passage as shown in FIG. The holding portion 28 is preferably made of a material that does not damage the outer ear 9 such as plastic, rubber, or urethane.

  As shown in FIG. 4B, the pneumatic cuff 20 and the support portion 24 are integrated with the holding portion 28 and are mounted so as to sandwich the tragus 5. Here, the pneumatic cuff 20 is formed by disposing the bag body 30 on the housing 29 and forming the pressing surface 32, and is pressed by the expansion of the bag body 30 by sending and discharging the gas inside the bag body 30. The surface 32 is protruded and the tragus 5 is pressed together with the support portion 24. Further, air is sent and discharged into the pneumatic cuff 20 through an air supply pipe 23 as shown in FIG. The cuff pressure is sent to a cuff pressure detector (not shown) by the pressure transmission pipe 19.

  In addition, the light emitting element 25b and the light receiving element 25a are disposed inside the bag body 30. Furthermore, a microphone 21 as a sound wave detection unit is disposed inside the bag body 30. The light emitting element 25b irradiates the tragus 5 as a part of the outer ear 9, and the light receiving element 25a receives the transmitted light 47 transmitted through the tragus 5 among the light emitted from the light emitting element 25b. The light-emitting element 25b and the light-receiving element 25a form the transmission photoelectric pulse wave detection system described above to detect a pulse wave, and the blood pressure is measured from the detected pulse wave according to the principle described above. The light receiving element 25a and the light emitting element 25b may be arranged on the housing 29 side or arranged on the support portion 24 side to form a reflective photoelectric pulse wave detection system. The microphone 21 detects Korotkoff sound generated from the tragus 5 when the tragus 5 is pressed.

  As described above, the blood pressure measurement device 80 according to the present embodiment is small and can be stably attached to the outer ear 9, so that it is not troublesome in daily life and is continuously affected by noise due to movement of the human body. Blood pressure can be measured without In the present embodiment, the blood pressure measuring device 80 is mounted on the outer ear 9 and / or the periphery of the living body as a subject. However, the mounting site of the blood pressure measuring device is the outer ear canal and the living body as the subject. More preferably, it is the pinna or the tragus and / or its periphery.

  As described above, the blood pressure measurement device according to the present embodiment makes it possible to perform blood pressure measurement with higher accuracy by making use of the features of the Korotkoff method, the pressure pulse wave method, and the photoelectric pulse wave method to compensate for the drawbacks. .

  Here, the control method of the blood pressure measurement device according to the present embodiment will be described, and the blood pressure measurement method by the blood pressure measurement device according to the present embodiment will be described with reference to FIGS. 1 and 5. FIG. 5 shows an example of a basic control flow of the control unit of the blood pressure measurement device according to the present embodiment.

  Prior to the blood pressure measurement, the blood pressure measuring device 60 is mounted by being sandwiched by the U-shaped body 31 so that the trabecular 5 as the subject shown in FIG. Then, blood pressure measurement is started. First, the blood pressure measurement device 60 shown in FIG. 1 starts pressing in the pressing procedure 90 shown in FIG. 5 (step S1). In step S <b> 1, air is supplied into the bag body 30 by the air supply pipe 23 shown in FIG. 1, and the cuff pressure of the pneumatic cuff 20 is raised to cause the pressing surface 32 to protrude. Since the tragus 5 is clamped by the U-shaped body 31, it is pressed by the pressing force 53 of the pressing surface 32. Here, in the blood pressure measurement device 60 shown in FIG. 1, the pressing is continued while detecting whether the pulse wave of the tragus 5 has stopped (step S2). When the pressing force 53 is further increased and the blood flow inside the tragus 5 is stopped, the pressing is stopped while the pressing force 53 is maintained (step S3). Here, detection of whether or not the pulse wave of the tragus 5 has stopped may be, for example, by detecting the photoelectric pulse wave by the photoelectric pulse wave detection unit 25 or by Korotkoff sound by the microphone 21 as the sound wave detection unit. May be detected. Moreover, you may detect a pressure pulse with the cuff pressure detector 51 as a pressure pulse wave detection part. And when a pulse wave or Korotkoff sound disappears in each detection part, it can detect that the pulse wave of tragus 5 stopped.

  Next, the blood pressure measurement device 60 shown in FIG. 1 performs an initial setting procedure 91 for blood pressure measurement. First, the cuff pressure is detected when the pulse wave is stopped (step S4), and the time t is set to 0 (step S5) and stored in the memory 45, respectively. Then, the cuff pressure is reduced (step S6), and the detection procedure 92 is performed. The cuff pressure is detected by a cuff pressure detector 51 shown in FIG. Further, the cuff pressure is reduced by discharging the air inside the bag body 30 from the air supply pipe 23. Then, the pressing force 53 gradually decreases.

In the detection procedure 92, first, after step S5, the time t is set to t + Δt (step S7) and stored in the memory 45, and the cuff pressure at that time is detected (step S8) and stored in the memory 45. Then, the pulse wave of the tragus 5 shown in FIG. 1 is detected (step S9), and the detected value is stored in the memory 45. Here, in this embodiment, in step S9 for detecting a pulse wave, the photoelectric pulse wave detection unit 25, the cuff pressure detector 51 as a pressure pulse wave detection unit, and the microphone 21 as a sound wave detection unit shown in FIG. At least two of them are made to detect each detection target. Thus, in step S9 for detecting the pulse wave, at least two types of blood pressure results among the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method can be obtained, and therefore the validity of the measurement result can be judged. It is. Therefore, blood pressure can be measured with high accuracy. Furthermore, when the photoelectric pulse wave detection unit 25, the cuff pressure detector 51, and the microphone 21 are provided as in the present embodiment, three types of detection are performed by the detection procedure 92 using the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method. Blood pressure results can be obtained and blood pressure can be measured with higher accuracy.
Then, it is determined whether or not the cuff pressure is less than a predetermined value (cp: for example, pressure that does not burden the tragus 5 such as cp <10 mmhg) (step S10), and the cuff pressure is less than the predetermined value. The cuff pressure reduction is stopped (step S11).

  Thereafter, in the blood pressure calculation procedure 93, the detected pulse wave value stored in the memory 45 is read, and the maximum blood pressure and the minimum blood pressure are calculated (step S12). In step S12, it is determined whether the blood pressure can be calculated (step S13). If the blood pressure can be calculated, the calculated blood pressure is output (step S15). If the blood pressure cannot be calculated, an error is output (step S15). Step S14). When the blood pressure can be measured, the blood pressure measurement is terminated.

  Here, as to whether or not the blood pressure could be calculated, one or both of the maximum blood pressure and the minimum blood pressure could not be calculated. In addition, the blood pressure may be output, for example, by displaying the blood pressure value on the display screen or printing it on paper. Moreover, you may graph with the past blood pressure result. An output method can be applied as appropriate so that the subject can easily understand the blood pressure measurement result. The error output may be displayed on a display screen, or blood pressure may be automatically remeasured. Alternatively, it may be displayed on the display screen and automatically remeasured. In this case, the control flow returns to the pressing procedure 90 in FIG. In the decompression stop process in step S11, all the air remaining in the bag 30 shown in FIG. 1 may be discharged in step S11, but may be discharged after confirming the calculation of blood pressure in step S13. In the case of re-measurement, the pressing process can be shortened.

  In the present embodiment, a photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit 25 to detect a pulse wave before pressing by the pneumatic cuff 20 shown in FIG. A decompression amount calculation procedure for calculating a decompression amount per unit time from a product of the pulse rate per unit time obtained from the pulse wave detected in step 1 and a predetermined decompression amount per beat, and in FIG. In the pulse wave detection process of step S9 of the detection procedure 92, the pneumatic cuff 20 shown in FIG. 1 is shown in FIG. 1 while being depressurized from a predetermined pressing force according to the pressure reduction amount per unit time calculated in the pressure reduction amount calculation procedure. At least two of the photoelectric pulse wave detector 25, the cuff pressure detector 51 as a pressure pulse wave detector, and the microphone 21 as a sound wave detector are detected.

  Here, the predetermined pressing force is, for example, 100 mmhg or more as shown in FIG. 3, but considering the burden on the tragus 5, when the pulse wave is stopped in the pressing procedure 90 shown in FIG. 5. The pressing force (= cuff pressure) may be set to a predetermined pressing force.

  Here, FIG. 6 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. In the control flow shown in FIG. 6, between the start and the pressing procedure 90, the photoelectric pulse wave detecting procedure (step S101) for causing the photoelectric pulse wave detecting unit 25 shown in FIG. The amount of decompression per unit time is calculated from the product of step S102 and the pulse rate per unit time obtained from the pulse wave detected in the photoelectric pulse wave detection procedure (step S101) and a predetermined amount of decompression per beat. And a decompression amount calculation procedure (step S103).

  In the photoelectric pulse wave detection procedure (step S101), the detected detection value is stored in the memory 45. In the decompression amount calculation procedure (step S103), the detection value detected in the photoelectric pulse wave detection procedure (step S101) is read from the memory 45, and the decompression amount (decompression rate) per unit time is calculated. However, this configuration is only an example of the control flow. Further, the time-out time in step S102 is, for example, 2. in order to obtain at least two or more pulses, considering that the average minimum value of the pulse rate of the human body is 50 times / second to 60 times / second. What is necessary is just 5 seconds.

  By determining the decompression speed by the decompression amount calculation procedure (step S103), the blood pressure can be measured at an appropriate decompression speed according to the pulse rate of the subject, so that the blood pressure can be measured accurately in a short time. it can.

  In the present embodiment, after the detection procedure 92 shown in FIG. 5, at least the photoelectric pulse wave detection unit 25 shown in FIG. 1, the cuff pressure detector 51 as the pressure pulse wave detection unit, or the microphone 21 as the sound wave detection unit. The method further includes an average value calculation procedure for calculating an average value of the systolic blood pressure value or the diastolic blood pressure value determined based on the detected values obtained from the two. The present embodiment can be realized in the process of calculating the blood pressure in step S12 shown in FIG.

  In the process of calculating the blood pressure in step S12, each method is obtained by taking an average value of the results obtained by at least two methods among the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method as pulse wave information detection means. It is possible to compensate for the error in the measurement result by, and to obtain a more appropriate blood pressure value.

  Further, in this embodiment, after the detection procedure 92 shown in FIG. 5, the photoelectric pulse wave detection unit 25 shown in FIG. 1, the cuff pressure detector 51 as the pressure pulse wave detection unit, and the microphone 21 as the sound wave detection unit are obtained. Including an intermediate value selection procedure for selecting a maximum blood pressure value or an intermediate value of the minimum blood pressure values determined based on each detected value. The present embodiment can be realized in the process of calculating the blood pressure in step S12 shown in FIG.

  In the process of calculating blood pressure in step S12 shown in FIG. 5, by taking an intermediate value of the results obtained by the three methods of the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method as the pulse wave information detection means, The error of the measurement result by each method can be compensated, and a more appropriate blood pressure value can be obtained.

  In the present embodiment, after the detection procedure 92 shown in FIG. 5, at least the photoelectric pulse wave detection unit 25 shown in FIG. 1, the cuff pressure detector 51 as the pressure pulse wave detection unit, or the microphone 21 as the sound wave detection unit. An error signal output procedure for outputting an error signal when the difference between the maximum blood pressure value or the minimum blood pressure value determined based on the detected values obtained from the two is greater than a predetermined value.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, at least two of the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. I will do it. Further, the difference between the maximum blood pressure value or the minimum blood pressure value is determined between the process of determining whether or not the blood pressure can be calculated in step S13 of the blood pressure calculation procedure 93 shown in FIG. 5 and the process of outputting the blood pressure in step S15. It is determined whether or not the absolute value is larger than a predetermined value.

  FIG. 7 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. FIG. 7 shows a case where detection is performed by three of the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. 1 in the process of detecting the pulse wave in step S9 shown in FIG.

  As shown in FIG. 7, after the process of determining whether or not the blood pressure has been calculated in step S <b> 13, detection is performed by the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. 1. It is determined whether or not the difference between the absolute values of the respective systolic blood pressures calculated based on the detection result is larger than a predetermined value (step S145), and an error output procedure (step S146) for displaying an error if the difference is larger. Furthermore, whether or not the difference between the absolute values of the diastolic blood pressures calculated based on the detection results detected by the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 is greater than a predetermined value. (Step S147), and an error output procedure (step S148) for displaying an error if it is larger is included.

  In FIG. 7, the determination is made with respect to the maximum blood pressure and the minimum blood pressure, but either one may be used. In addition, when any two of the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. 1 are used for detection, the two systolic blood pressure and the systolic blood pressure calculated based on the two detection results are used. Judgment will be made. Further, the determination may be made for the maximum blood pressure and the minimum blood pressure, or may be made for either one. By determining the maximum blood pressure and the minimum blood pressure as in this embodiment, a more accurate blood pressure value can be selected.

  Thus, after the detection procedure 92 shown in FIG. 5, the absolute difference between the results obtained by at least two methods of the photoelectric pulse wave method, the pressure pulse wave method, and the Korotkoff method as the pulse wave information detection means By outputting an error signal when the value is larger than the predetermined value, it is possible to determine the validity of the measurement result, such as the possibility of noise being mixed during blood pressure measurement by each method. Therefore, it is possible to make a judgment such as re-measurement.

  Further, in the present embodiment, the pulse wave is detected by the photoelectric pulse wave detection unit 25 and the cuff pressure detector 51 as the pressure pulse wave detection unit while reducing the pressing force by the pneumatic cuff 20 as the pressing unit shown in FIG. And the maximum amplitude value of the pulse wave amplitude detected by the cuff pressure detector 51 in the detection procedure is predetermined based on the pulse wave intensity detected by the photoelectric pulse wave detector 25 before being pressed by the pneumatic cuff 20. A warning output procedure for outputting a warning when the value is smaller than the value.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, the pulse wave is detected by the photoelectric pulse wave detector 25 and the cuff pressure detector 51 shown in FIG. And Further, the above warning output procedure is provided between the process of stopping the decompression in step S11 shown in FIG. 5 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure.

  FIG. 8 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. FIG. 8 shows a case where detection is performed by two of the photoelectric pulse wave detection unit 25 and the cuff pressure detector 51 shown in FIG. 1 in the process of detecting the pulse wave in step S9. As shown in FIG. 8, whether the maximum value of the amplitude intensity of the pulse wave is smaller than a predetermined value between the process of stopping the decompression in step S11 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure 93. A warning output procedure 921 having a step S111 for judging whether or not and a step S112 for giving a warning when the maximum value of the amplitude intensity of the pulse wave is smaller than a predetermined value. The amplitude intensity of the pulse wave is the detection result of the photoelectric pulse wave detected in step S9.

  In step S111 for determining whether or not the maximum value of the amplitude of the pulse wave is smaller than a predetermined value, the pressure pulse amplitude intensity stored in the memory 45 in the process of detecting the pulse wave shown in FIG. It is determined whether or not the maximum value is smaller than a predetermined value (C (photoelectric pulse wave intensity)) stored in the memory 45 in the process of detecting the photoelectric pulse wave in step S9. Here, the maximum value of the pressure pulse amplitude intensity refers to the amplitude intensity in the vicinity of 30 seconds of the pressure pulse waveform 36 shown in FIG. 3, and the predetermined value (C (intensity of photoelectric pulse wave)) is illustrated in FIG. This is a predetermined value determined based on the amplitude intensity when the photoelectric pulse waveform 35 converges to a constant value after 60 seconds. For example, in FIG. It may be set to a value not less than a certain noise level and not more than the amplitude value of the pressure pulse waveform 36 at time T12. Further, the amplitude value of the pressure pulse waveform 36 at time T12 is obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the pressure pulse waveform 36, but the setting of this predetermined value is only an example. .

  Thus, in the warning output procedure 921, when the maximum value of the amplitude intensity of the detected pulse wave of the cuff pressure detector 51 is smaller than the predetermined value, the detection sensitivity of the cuff pressure detector 51 shown in FIG. There is a possibility that the pressure of the pearl 5 is insufficient. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the cuff pressure detector 51 and prompting the blood pressure measuring device 60 to be remounted. Further, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on the warning made in the warning output procedure 921. Moreover, it can also be judged from the measurement result after the warning that re-measurement is necessary in the subject.

  In the present embodiment, the pressure pulse 53 is reduced by the pneumatic cuff 20 as the pressing portion shown in FIG. 1, the pulse wave is detected by the photoelectric pulse wave detection portion 25, and the Korotkoff sound is detected by the microphone 21 as the sound wave detection portion. And the maximum value of the detection signal intensity detected by the microphone 21 in the detection procedure is greater than a predetermined value based on the intensity of the pulse wave detected by the photoelectric pulse wave detection unit 25 before being pressed by the pneumatic cuff 20. A warning output procedure for outputting a warning when it is small.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, the pulse wave detection unit 25 and the microphone 21 shown in FIG. Further, the above warning output procedure is provided between the process of stopping the decompression in step S11 shown in FIG. 5 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure 93.

  FIG. 9 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. FIG. 9 shows a case where detection is performed by two of the photoelectric pulse wave detector 25 and the microphone 21 shown in FIG. 1 in the process of detecting the pulse wave in step S9. As shown in FIG. 9, whether the maximum value of the Korotkoff sound detection intensity is smaller than a predetermined value between the process of stopping the pressure reduction in step S11 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure 93. A warning output procedure 922 having a step S113 for judging whether or not and a step S114 for giving a warning when the maximum value of the detected intensity of the Korotkoff sound is smaller than a predetermined value. The amplitude intensity of the pulse wave is the detection result of the photoelectric pulse wave detected in step S9.

  In step S113 for determining whether or not the maximum value of the Korotkoff sound detection intensity is smaller than a predetermined value, the maximum value of the Korotkoff sound detection intensity stored in the memory 45 in the process of detecting the pulse wave (step S9) is calculated. In the process of detecting the photoelectric pulse wave in step S9, it is determined whether or not the value is smaller than a predetermined value (C (photoelectric pulse wave intensity)) stored in the memory 45. Here, the maximum value of the detected intensity of the Korotkoff sound means the amplitude intensity when the Korotkoff sound waveform 37 shown in FIG. 3 is generated, and the predetermined value (C (photoelectric pulse wave intensity)) is shown in FIG. This is a predetermined value determined based on the amplitude intensity when the photoelectric pulse waveform 35 converges to a constant value after 60 seconds. For example, in FIG. 3, the electrical current around 20 seconds where the Korotkoff sound disappears in FIG. It may be set to a value not less than a certain noise level and not more than the amplitude value of the Korotkoff sound waveform 37 at time T13. The amplitude value of the Korotkoff sound waveform 37 at time T13 is obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the Korotkoff sound waveform 37, but the setting of this predetermined value is only an example. .

  Thus, in the warning output procedure 922 shown in FIG. 9, when the detection signal intensity of the microphone 21 is smaller than a predetermined value, the detection sensitivity of the microphone 21 shown in FIG. 1 is low or the compression of the tragus 5 is insufficient. There is a possibility. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the microphone 21 or prompting the blood pressure measuring device 60 to be remounted. Also, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on the warning made in the warning output procedure 922. Moreover, it can also be judged from the measurement result after the warning that re-measurement is necessary in the subject.

  In the present embodiment, the pulse wave is applied to the photoelectric pulse wave detection unit 25 and the cuff pressure detector 51 serving as the pressure pulse wave detection unit while the pressing force 53 is reduced by the pneumatic cuff 20 serving as the pressing unit illustrated in FIG. And a detection procedure for detecting the Korotkoff sound by the microphone 21 as the sound wave detection unit, and the maximum value of the amplitude intensity of the pulse wave detected by the cuff pressure detector 51 in the detection procedure or the detection signal intensity detected by the microphone 21 A warning output procedure for outputting a warning when the value is smaller than a predetermined value based on the intensity of the pulse wave detected by the photoelectric pulse wave detection unit 25 before being pressed by the pneumatic cuff 20.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. And Further, the above warning output procedure is provided between the process of stopping the decompression in step S11 shown in FIG. 5 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure 93.

  FIG. 10 shows an example of a control flow of the blood pressure measurement device according to this embodiment. FIG. 10 shows a case where detection is performed by the photoelectric pulse wave detector 25, the cuff pressure detector 51, and the microphone 21 shown in FIG. 1 in the process of detecting the pulse wave in step S9. As shown in FIG. 10, whether the maximum value of the Korotkoff sound detection signal intensity is smaller than a predetermined value between the process of stopping the decompression in step S11 and the process of calculating the blood pressure in step S12 of the blood pressure calculation procedure 93. Step S115 for determining whether or not the maximum value of the amplitude intensity of the pulse wave is smaller than a predetermined value, and the maximum value of the detection signal intensity of the Korotkoff sound is smaller than the predetermined value and the pulse wave A warning output procedure 923 having a warning step S116 when the maximum value of the amplitude intensity is smaller than a predetermined value. The amplitude intensity of the pulse wave is the detection result of the photoelectric pulse wave detected in step S9.

  In step S115 for determining whether the maximum value of the amplitude intensity of the Korotkoff sound waveform is smaller than a predetermined value and determining whether the maximum value of the amplitude intensity of the pulse wave is smaller than the predetermined value, the pulse wave The maximum values of the pressure pulse amplitude intensity and the Korotkoff sound detection signal intensity stored in the memory 45 in the process of detecting the signal (step S9) are the predetermined values stored in the memory 45 in the process of detecting the photoelectric pulse wave in step S9. It is determined whether or not it is smaller than the values (C1 (intensity of photoelectric pulse wave)) and (C2 (intensity of photoelectric pulse wave)). Here, the maximum value of the pressure pulse amplitude intensity means the amplitude intensity around 30 seconds of the pressure pulse waveform 36 shown in FIG. 3, and the predetermined value (C1 (intensity of photoelectric pulse wave)) is shown in FIG. This is a predetermined value determined based on the amplitude intensity when the photoelectric pulse waveform 35 converges to a constant value after 60 seconds. For example, in FIG. It may be set to a value not less than a certain noise level and not more than the amplitude value of the pressure pulse waveform 36 at time T12. Further, the amplitude value of the pressure pulse waveform 36 at time T12 is obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the pressure pulse waveform 36, but the setting of this predetermined value is only an example. .

  Further, the maximum value of the detected signal intensity of the Korotkoff sound means the amplitude intensity when the Korotkoff sound waveform 37 shown in FIG. 3 is generated, and the predetermined value (C2 (intensity of photoelectric pulse wave)) is shown in FIG. This is a predetermined value determined based on the amplitude intensity when the photoelectric pulse waveform 35 converges to a constant value after 60 seconds. For example, in FIG. 3, the electrical current around 20 seconds where the Korotkoff sound disappears in FIG. It may be set to a value not less than a certain noise level and not more than the amplitude value of the Korotkoff sound waveform 37 at time T13. The amplitude value of the Korotkoff sound waveform 37 at time T13 is obtained from the relationship between the amplitude intensity of the photoelectric pulse waveform 35 and the amplitude value of the Korotkoff sound waveform 37, but the setting of this predetermined value is only an example.

  Thus, in the warning output procedure 923, when the maximum value of the amplitude intensity of the detected pulse wave of the cuff pressure detector 51 is smaller than the predetermined value or the detected signal intensity of the microphone 21 is smaller than the predetermined value, FIG. There is a possibility that the detection sensitivity of the cuff pressure detector 51 or the microphone 21 shown is low, or the compression of the tragus 5 is insufficient. Therefore, it is possible to take measures such as outputting a warning to increase the detection sensitivity of the cuff pressure detector 51 or the microphone 21 or prompting the blood pressure measurement device 60 to be remounted. Further, it is possible to perform processing such as automatically re-measurement by determining that re-measurement is necessary based on the warning made in the warning output procedure 923 shown in FIG. Moreover, it can also be judged from the measurement result after the warning that re-measurement is necessary in the subject.

  Further, in the present embodiment, the rising point of the envelope 54 of the pulse wave waveform detected by the photoelectric pulse wave detecting unit 25 while reducing the pressure from the predetermined pressing force to the pneumatic cuff 20 as the pressing unit shown in FIG. Whether the absolute value of the difference between the pressing force 53 that starts to be detected and the pressing force 53 that starts to detect the Korotkoff sound with the microphone 21 as the sound wave detection unit is greater than a predetermined value or the Korotkoff sound that is detected by the microphone 21 disappears. The absolute value of the difference between the pressing force 53 and the pressing force 53 at which the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is greater than a predetermined value. A determination procedure for determining whether or not the value is large is included.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, the pulse wave is detected by the photoelectric pulse wave detector 25 shown in FIG. 1, and the Korotkoff sound is detected by the microphone 21. And Further, the above determination procedure is provided between the process of determining whether or not the blood pressure in step S13 shown in FIG. 5 has been calculated and the process of outputting the blood pressure in step S15.

FIG. 11 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. FIG. 11 shows a case where detection is performed by the photoelectric pulse wave detector 25 and the microphone 21 shown in FIG. As shown in FIG. 11, in the control flow according to the present embodiment, after step S13, the pressing force (P ₁₎ starts to detect the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25. Step S131 for determining whether the absolute value of the difference between the _{photoelectric pulse wave} ) and the pressing force at which the microphone 21 starts detecting Korotkoff sound (P1 _{Korotkoff sound} ) is larger than a predetermined value; Korotkoff detected by the microphone 21 pressing force sound disappears (P 2 _{Korotkoff sounds)} and the pressing force which the slope of the envelope 54 of the pulse wave waveform detected by the photoelectric pulse wave detector 25 becomes the inflection point of the negatively and envelope 54 (P ₂ Step S132 for determining whether or not the absolute value of the difference from the _{photoelectric pulse wave} is larger than a predetermined value.

In addition, in the determination procedure 931, if the absolute value of the difference is larger than the predetermined value in step S131, it is determined whether or not P1 _{photoelectric pulse wave} > P1 _{Korotkoff sound} , and P in step S133. If it is determined that _{1 photoelectric pulse wave} ≦ P _{1 Korotkoff sound} , step S134 in which the same determination as in step S132 is performed, and if it is determined in step S134 that the absolute value of the difference is greater than a predetermined value, P _{2 Korotkoff sound} If it is determined that the absolute value of the difference is larger than the predetermined value in step S135 for determining whether or not> P2 _{photoelectric pulse wave, and} whether or not P2 _{Korotkoff sound} > P2 _{photoelectric pulse wave} is determined in step S132 Step S135. The provision of steps S133 to S136 is based on the fact that the generation of Korotkoff sounds is delayed due to the viscosity of blood, and the disappearance is accelerated.

  If the determinations are different in step S133, step S135, and step S136, an error is output (step S151, step S152, and step S153). Further, in the determination in step S134, step S135, or step S136, it is output that there is a possibility that the blood viscosity is high in a predetermined case (step S154). In short, in these steps, the photoelectric pulse waveform 35 and the Korotkoff waveform 37 shown in FIG. 3 are compared, and when P13 is on the inside in a predetermined range with respect to P11 or P23 is on the inside with reference to P21. Means that the blood viscosity may be high. Regardless of the above, if P13 is outside in a predetermined range with P11 as a reference or P23 is outside with P21 as a reference, an error is output.

  Here, the predetermined value C1 is set to, for example, twice the difference between P11 and P13 shown in FIG. The predetermined value C2 is set to, for example, twice the difference between P21 and P23 shown in FIG. Note that the pressing force at which the slope of the envelope 54 of the pulse wave detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is the cuff pressure P21 at time T21 in FIG. Corresponding to

  As described above, in the determination procedure 931, the Korotkoff sound is started to be detected by the pressing force 53 and the microphone 21 which starts detecting the rising point of the envelope 54 of the pulse wave waveform detected by the photoelectric pulse wave detector 25 shown in FIG. The absolute value of the difference from the pressing force 53 or the pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears and the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detecting unit 25 is negative and the envelope 54 When the absolute value of the difference from the pressing force 53 that is the inflection point is larger than the predetermined value, it can be notified that the viscosity of the blood is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute difference between the pressing force 53 that starts detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detecting unit 25 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21. Value or the pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears, and the inclination of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative, and the pressing force becomes the inflection point of the envelope 54 If the absolute value of the difference from 53 is larger than the predetermined value, the measurement result may not be valid. In this case, processing such as outputting an error and performing remeasurement after the determination procedure 931 can be performed.

  In the present embodiment, the cuff pressure detector 51 as the pressure pulse wave detector 51 detects the pulse wave and detects the sound wave while reducing the pressure from the predetermined pressure to the pneumatic cuff 20 as the pressing portion shown in FIG. A pressing force that causes the microphone 21 to detect Korotkoff sound and starts detecting the rising point of the envelope 55 of the waveform of the pulse wave detected by the cuff pressure detector 51; and a pressing force that starts to detect Korotkoff sound by the microphone 21; Whether the absolute value of the difference between the two is greater than a predetermined value, or the slope of the envelope 55 of the waveform of the pulse wave detected by the cuff pressure detector 51 and the pressing force at which the Korotkoff sound disappears by the microphone 21 is negative and the envelope And a determination procedure for determining whether or not the absolute value of the difference from the pressing force at 55 inflection point is larger than a predetermined value.

  In the present embodiment, in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. 5, the cuff pressure detector 51 shown in FIG. 1 detects the pulse wave, and the microphone 21 detects Korotkoff sound. To do. Further, the above determination procedure is provided between the process of determining whether or not the blood pressure in step S13 shown in FIG. 5 has been calculated and the process of outputting the blood pressure in step S15.

FIG. 12 shows an example of a control flow of the blood pressure measurement device according to this embodiment. FIG. 12 shows a case where detection is performed by the cuff pressure detector 51 and the microphone 21 shown in FIG. In the control flow according to the present embodiment, as shown in FIG. 12, the pressing force (P1 _pressure) that starts detecting the rising point of the envelope 55 of the waveform of the pulse wave detected by the cuff pressure detector 51 after step S13. Step S137 for determining whether the absolute value of the difference between the _{pulse wave} ) and the pressing force at which the microphone 21 starts to detect Korotkoff sounds (P1 _{Korotkoff sound} ) is greater than a predetermined value; Korotkoff sounds detected by the microphone 21 _Pressure (P _{2 Korotkoff sound} ) and the inclination of the envelope 55 of the pulse waveform detected by the cuff pressure detector 51 are negative, and the _pressure (P _{2 pressure pulse)} becomes the inflection point of the envelope 55 Step S138 for determining whether or not the absolute value of the difference from the ( _wave ) is larger than a predetermined value.

In addition, in the determination procedure 932, if the absolute value of the difference is larger than the predetermined value in step S137, it is determined whether or not P _{1 pressure pulse wave} > P _{1 Korotkoff sound,} and in step S139, When it is determined that P _{1 pressure pulse wave} ≦ P _{1 Korotkoff sound} , step S140 in which the same determination as in step S138 is performed, and in step S140, when it is determined that the absolute value of the difference is greater than a predetermined value, P _{2 Korotkoff sound} Step S141 for determining whether or not _sound > P2 _{pressure pulse wave, and} if it is determined in step S138 that the absolute value of the difference is greater than a predetermined value, it is determined whether or not P2 _{Korotkoff sound} > P2 _{pressure pulse wave.} Step S142. The provision of steps S139 to S142 is based on the fact that the generation of Korotkoff sounds is delayed due to the viscosity of blood and disappearance is accelerated.

  If the determinations in step S139, step S141, and step S142 are different, an error is output (step S155, step S156, and step S157). Further, in the determinations in step S140, step S141, and step S142, it is output that there is a possibility that blood viscosity is high in a predetermined case (step S158). In short, in these steps, the pressure pulse waveform 36 and the Korotkoff waveform 37 shown in FIG. 3 are compared, and when P13 is inward within a predetermined range with P12 as a reference or P23 is inward with P22 as a reference Means that the blood viscosity may be high. Regardless of the above, if P13 is outside in a predetermined range with P12 as a reference or P23 is outside with P22 as a reference, an error is output.

  Here, the predetermined value C1 is set to, for example, twice the difference between P12 and P13 shown in FIG. The predetermined value C2 is set to, for example, twice the difference between P22 and P23 shown in FIG. Note that the pressing force at which the slope of the envelope 55 of the pulse waveform detected by the cuff pressure detector 51 is negative and the inflection point of the envelope 55 is the cuff pressure P22 at time T22 in FIG. Correspond.

  As described above, in the determination procedure 932, the pressing force 53 that starts detecting the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 shown in FIG. 1 and the pressing force 53 that starts detecting Korotkoff sound by the microphone 21 are detected. The absolute value of the difference from the pressure 53 or the slope of the envelope 55 of the pulse wave waveform detected by the pressing force 53 and the cuff pressure detector 51 where the Korotkoff sound detected by the microphone 21 disappears and the envelope 55 changes When the absolute value of the difference from the pressing force 53 serving as the bending point is larger than the predetermined value, it can be notified that the blood viscosity is high. Thereby, it is possible to know the health condition of the subject.

  On the other hand, the absolute value of the difference between the pressing force at which the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 starts to be detected and the pressing force 53 at which the Korotkoff sound starts to be detected by the microphone 21 or The pressing force 53 at which the Korotkoff sound detected by the microphone 21 disappears, and the pressing force 53 at which the inclination of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 is negative and becomes the inflection point of the envelope 55. If the difference is large compared to the predetermined value, the measurement result may not be valid. In this case, processing such as performing remeasurement after the determination procedure 932 can be performed.

  In the present embodiment, the pneumatic cuff 20 as the pressing unit shown in FIG. 1 is depressurized from the predetermined pressing force 53 while the photoelectric pulse wave detecting unit 25 and the cuff pressure detector 51 as the pressure pulse wave detecting unit are used. A pulse wave is detected, and a pressing force 53 that starts detecting the rising point of the envelope 54 of the pulse wave detected by the photoelectric pulse wave detector 25 and an envelope 55 of the pulse waveform detected by the cuff pressure detector 51 are detected. Whether the absolute value of the difference from the pressing force 53 that starts detecting the rising point of the pulse wave is larger than a predetermined value, or the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the envelope The difference between the pressing force 53 that is the inflection point of the line 54 and the pressing force 53 that is the inclination of the envelope 55 of the waveform of the pulse wave detected by the cuff pressure detector 51 and is the inflection point of the envelope 55 A determination procedure for determining whether or not the absolute value is larger than a predetermined value is included.

  In the present embodiment, the pulse wave is detected by the photoelectric pulse wave detector 25 and the cuff pressure detector 51 shown in FIG. 1 in the process of detecting the pulse wave in step S9 of the detection procedure 92 shown in FIG. Further, the above determination procedure is provided between the process of determining whether or not the blood pressure in step S13 shown in FIG. 5 has been calculated and the process of outputting the blood pressure in step S15.

  FIG. 13 shows an example of a control flow of the blood pressure measurement device according to the present embodiment. FIG. 13 shows a case where a pulse wave is detected by the photoelectric pulse wave detector 25 and the cuff pressure detector 51 shown in FIG. In the control flow according to the present embodiment, as shown in FIG. 13, after step S <b> 13, a push to start detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 shown in FIG. 1 is started. Step S143 for determining whether the absolute value of the difference between the pressure 53 and the pressing force 53 at which the rising point of the envelope 55 of the pulse wave waveform detected by the cuff pressure detector 51 starts to be detected is greater than a predetermined value; The pulse waveform detected by the cuff pressure detector 51 and the pressing force 53 and the inflection point of the envelope 54 are negative and the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative. A determination procedure 933 including a step S144 of determining whether or not an absolute value of a difference from the pressing force 53 that is an inflection point of the envelope 55 is greater than a predetermined value when the inclination of the envelope 55 is negative. ing. If the value is larger than the predetermined value in either step S143 or step S144, an error is output (step S159).

  Here, the predetermined value C1 is set to, for example, twice the difference between P11 and P12 shown in FIG. The predetermined value C2 is set to, for example, twice the difference between P21 and P22 shown in FIG. Note that the pressing force at which the slope of the envelope 54 of the pulse wave detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 is the cuff pressure P21 at time T21 in FIG. Corresponding to Further, the pressing force at which the slope of the envelope 55 of the pulse waveform detected by the cuff pressure detector 51 is negative and the inflection point of the envelope 55 is the cuff pressure P22 at time T22 in FIG. Correspond.

  As described above, the pressing force 53 that starts detecting the rising point of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 shown in FIG. 1 and the envelope of the pulse waveform detected by the cuff pressure detector 51 are detected. The absolute value of the difference from the pressing force 53 that starts detecting the rising point of the line 55 or the slope of the envelope 54 of the pulse waveform detected by the photoelectric pulse wave detector 25 is negative and the inflection point of the envelope 54 The absolute value of the difference between the pressing force 53 and the pressing force 53 that is the inflection point of the envelope 55 is negative and the slope of the envelope 55 of the pulse waveform detected by the cuff pressure detector 51 is negative. If it is large, the measurement result may be invalid. In this case, processing such as performing re-measurement after the determination procedure 933 in FIG. 13 can be performed.

  As described above, in the control method of the blood pressure measurement device according to the present embodiment, more accurate blood pressure measurement can be performed by making use of the respective features of the Korotkoff method, the pressure pulse wave method, and the photoelectric pulse wave method to compensate for the drawbacks. Make it possible.

  The blood pressure measurement device of the present invention can be applied to the use as a means for knowing the physical condition and the activity state of the body because it enables measurement of blood pressure for a long time at a small site such as the outer ear of a living body.

It is the schematic which mounted | wore with the tragus of the outer ear of the biological body as a test subject the blood pressure measuring device which concerns on 1 embodiment. It is the schematic which mounted | wore with the tragus of the outer ear of the biological body as a test subject the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed each result which measured the photoelectric pulse wave, the pressure pulse, and the Korotkoff sound in the pressure reduction process by pressing the tragus as a subject. It is the schematic which showed another form of the blood-pressure measuring apparatus. It is the figure which showed one example of the basic control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment. It is the figure which showed one example of the control flow of the control part of the blood pressure measuring device which concerns on 1 embodiment.

Explanation of symbols

2: blood vessel, 3: blood cell, 5: tragus 6: opposite ring, 7: ear ring leg, 8: opposite ring, 9: outer ear 19: pressure transmission pipe, 20: pneumatic cuff, 21: microphone, 22: piezoelectric element 23: Air supply pipe 24: Support part 25a: Light receiving element, 25b: Light emitting element, 25: Photoelectric pulse wave detecting part 27: Cavity, 28: Holding part, 29: Housing 51: Cuff pressure detector, 52: Air pump 54 55: envelope 30: bag body, 31: U-shaped body, 32: pressing surface 41a, b, c, d, e, f: instruction wiring
45: Memory, 46: Control unit 47: Transmitted light, 48: Scattered light, 49: Irradiated light 53: Pressure 60, 70, 80: Blood pressure measuring device

Claims (30)

A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit;
A blood pressure measuring device comprising:
The control unit causes the photoelectric pulse wave detection unit to detect a pulse wave, and reduces the pressure reduction per unit time from the product of the pulse rate per unit time obtained from the detected pulse wave and a predetermined amount of pressure reduction per beat. In the process of calculating the amount, depressurizing the pressing unit from a predetermined pressing force according to the depressurizing amount per unit time, and depressurizing the pressing unit, the photoelectric pulse wave detecting unit and the pressure pulse wave detecting unit A blood pressure measurement device characterized by detecting the blood pressure. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds from the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit causes the photoelectric pulse wave detection unit to detect a pulse wave, and reduces the pressure reduction per unit time from the product of the pulse rate per unit time obtained from the detected pulse wave and a predetermined amount of pressure reduction per beat. In the process of calculating the amount, depressurizing the pressing unit from a predetermined pressing force according to the depressurizing amount per unit time, and depressurizing the pressing unit, the photoelectric pulse wave detecting unit detects the pulse wave and the sound wave detection A blood pressure measuring apparatus, characterized in that a Korotkoff sound is detected by a part. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit causes the photoelectric pulse wave detection unit to detect a pulse wave, and reduces the pressure reduction per unit time from the product of the pulse rate per unit time obtained from the detected pulse wave and a predetermined amount of pressure reduction per beat. In the process of calculating the amount, depressurizing the pressing unit from a predetermined pressing force according to the depressurizing amount per unit time, and depressurizing the pressing unit, the photoelectric pulse wave detecting unit and the pressure pulse wave detecting unit And detecting the Korotkoff sound in the sound wave detection unit. A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detecting means for detecting information relating to the pulse wave of the subject from the outside of the subject;
A control unit for increasing / decreasing the pressing force of the pressing unit and instructing detection by the pulse wave information detecting unit;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
At least two detection units,
The control unit outputs an error signal when an absolute value of a difference between a systolic blood pressure value or a diastolic blood pressure value determined based on the detected values detected by the at least two detecting units is larger than a predetermined value. A blood pressure measuring device characterized by the above. A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detection means for detecting information related to the pulse wave of the subject from outside the subject;
A control unit for increasing / decreasing the pressing force of the pressing unit and instructing detection by the pulse wave information detecting unit;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
At least two detection units,
The blood pressure measuring device, wherein the control unit calculates a maximum blood pressure value or an average value of minimum blood pressure values determined based on the detection values detected by the at least two detection units. A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detection means for detecting information related to the pulse wave of the subject from outside the subject;
A control unit for increasing / decreasing the pressing force of the pressing unit and instructing detection by the pulse wave information detecting unit;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
Have
The control unit selects an intermediate value of a systolic blood pressure value or a diastolic blood pressure value determined based on each detection value detected by the photoelectric pulse wave detecting unit, the pressure pulse wave detecting unit, and the sound wave detecting unit. A blood pressure measuring device characterized by the above. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit;
A blood pressure measuring device comprising:
The control unit detects a pulse detected by the photoelectric pulse wave detecting unit before the pressure by the pressing unit is detected by the maximum amplitude intensity of the detected pulse wave of the pressure pulse wave detecting unit in the process of reducing the pressing force by the pressing unit. A blood pressure measurement device that outputs a warning when the value is smaller than a predetermined value based on the amplitude intensity of a wave. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds in the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit is configured such that the maximum value of the detection signal intensity of the sound wave detection unit in the process of reducing the pressing force by the pressing unit is the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before the pressing by the pressing unit. A blood pressure measurement device that outputs a warning when it is smaller than a predetermined value based on the blood pressure. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit detects the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit in the process of reducing the pressing force by the pressing unit and the detection of the sound wave detection unit in the process of reducing the pressing force by the pressing unit. A blood pressure measurement device that outputs a warning when the maximum value of the signal intensity is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds from the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit causes the photoelectric pulse wave detection unit to detect a pulse wave and the sound wave detection unit to detect a Korotkoff sound in a process of depressurization from a predetermined pressing force by the pressing unit, and the photoelectric pulse wave detection unit detects the pulse wave. Whether or not the absolute value of the difference between the pressing force at which the rising point of the envelope of the waveform of the pulse wave to be detected starts to detect the Korotkoff sound at the sound wave detection unit is greater than a predetermined value, or whether the sound wave The difference between the pressing force at which the Korotkoff sound detected by the detecting unit disappears and the pressing force at which the slope of the envelope of the pulse waveform detected by the photoelectric pulse wave detecting unit is negative and becomes the inflection point of the envelope It is judged whether the absolute value of is larger than a predetermined value. A pressing part that can increase or decrease the pressing force on the subject;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the pressure pulse wave detection unit and the sound wave detection unit;
A blood pressure measuring device comprising:
The control unit operates the pressure pulse wave detection unit and the sound wave detection unit in a process of reducing pressure from a predetermined pressing force by the pressing unit, and detects an envelope of a waveform of a pulse wave detected by the pressure pulse wave detection unit. Whether the absolute value of the difference between the pressing force at which the rising point starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound is greater than a predetermined value, or the Korotkoff sound detected by the sound wave detection unit disappears Whether the absolute value of the difference between the pressing force and the pressing force that becomes the inflection point of the envelope is larger than a predetermined value, and the slope of the envelope of the pulse wave detected by the pressure pulse wave detector is negative A blood pressure measurement device characterized by determining whether or not. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A control unit that increases or decreases the pressing force of the pressing unit and instructs the operation of the photoelectric pulse wave detection unit and the pressure pulse wave detection unit;
A blood pressure measuring device comprising:
The control unit causes the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave in a pressure reducing process from a predetermined pressing force by the pressing unit, and detects a pulse wave detected by the photoelectric pulse wave detection unit. The absolute value of the difference between the pressing force at which the rising point of the waveform envelope starts to be detected and the pressing force at which the rising point of the envelope of the pulse wave detected by the pressure pulse wave detection unit starts to be detected is greater than a predetermined value. The pulse wave detected by the pressure pulse wave detection unit and the pressing force that is negative or has a negative envelope slope of the pulse wave waveform detected by the photoelectric pulse wave detection unit and becomes an inflection point of the envelope curve A blood pressure measuring apparatus, comprising: determining whether or not an absolute value of a difference from a pressing force serving as an inflection point of the envelope is greater than a predetermined value when the slope of the envelope of the waveform is negative.   The blood pressure measuring device according to any one of claims 1 to 12, wherein the subject is an outer ear of a living body and / or its periphery.   The blood pressure measuring device according to any one of claims 1 to 12, wherein the subject is a living external ear canal and / or pinna.   The blood pressure measuring device according to any one of claims 1 to 12, wherein the subject is a living tragus and / or its periphery. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave by a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A method for controlling a blood pressure measurement device comprising:
A photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before being pressed by the pressing unit;
A decompression amount calculation procedure for calculating a decompression amount per unit time from a product of a pulse rate per unit time obtained from the pulse wave detected by the photoelectric pulse wave detection procedure and a predetermined decompression amount per beat;
Detection that causes the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect pulse waves while reducing the pressure from a predetermined pressing force to the pressing unit according to the pressure reduction amount per unit time calculated in the pressure reduction amount calculation procedure Procedure and
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds from the subject;
A method for controlling a blood pressure measurement device comprising:
A photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before being pressed by the pressing unit;
A decompression amount calculation procedure for calculating a decompression amount per time from a product of the pulse rate per unit time obtained from the pulse wave detected by the photoelectric pulse wave detection procedure and a predetermined decompression amount per beat;
In accordance with the pressure reduction amount per unit time calculated in the pressure reduction amount calculation procedure, the photoelectric pulse wave detection unit detects a pulse wave and the sound wave detection unit detects Korotkoff sound while reducing the pressure from a predetermined pressing force to the pressing unit. A detection procedure for detecting
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pulse wave measurement unit that measures a pulse wave from vibration of the surface of the subject; and
A sound wave detector for detecting Korotkoff sounds from the subject;
A blood pressure measuring device comprising:
A photoelectric pulse wave detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave before being pressed by the pressing unit;
A decompression amount calculation procedure for calculating a decompression amount per time from a product of the pulse rate per unit time obtained from the pulse wave detected by the photoelectric pulse wave detection procedure and a predetermined decompression amount per beat;
In accordance with the pressure reduction amount per unit time calculated in the pressure reduction amount calculation procedure, the photoelectric pulse wave detection unit and the pressure pulse wave detection unit detect a pulse wave while reducing the pressure from a predetermined pressing force to the pressing unit, and A detection procedure for causing the sound wave detection unit to detect Korotkoff sounds;
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detection means for detecting information related to the pulse wave of the subject from outside the subject;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
At least two detection units,
A detection procedure for causing the at least two detection units to detect respective detection targets while reducing the pressure from a predetermined pressing force to the pressing unit;
After the detection procedure, an error signal is output when the absolute value of the difference between the systolic blood pressure value or the diastolic blood pressure value determined based on the respective detection values obtained from the at least two detection units is greater than a predetermined value. Error output procedure and
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detection means for detecting information related to the pulse wave of the subject from outside the subject;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
At least two detection units,
A detection procedure for causing the at least two detection units to detect respective detection targets while reducing the pressure from a predetermined pressing force to the pressing unit;
After the detection procedure, an average value calculation procedure for calculating an average value of the systolic blood pressure value or the diastolic blood pressure value determined based on the respective detection values obtained from the at least two detection units;
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
Pulse wave information detection means for detecting information related to the pulse wave of the subject from outside the subject;
A blood pressure measuring device comprising:
The pulse wave information detection means is a light emitting element that irradiates light to the subject, and a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element. A photoelectric pulse wave detector for detecting a pulse wave;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
Have
A detection procedure for causing the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit to detect respective detection targets while reducing the pressure from a predetermined pressing force to the pressing unit;
After the detection procedure, the intermediate value of the maximum blood pressure value or the minimum blood pressure value determined based on the respective detection values obtained from the photoelectric pulse wave detection unit, the pressure pulse wave detection unit, and the sound wave detection unit is selected. Intermediate value selection procedure;
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure for causing the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave while reducing the pressing force by the pressing unit;
The maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detection unit in the detection procedure is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit. When the warning output procedure to output a warning,
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds from the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave and causing the sound wave detection unit to detect Korotkoff sound while reducing the pressing force by the pressing unit;
When the maximum value of the detection signal intensity of the sound wave detection unit in the detection procedure is smaller than a predetermined value based on the amplitude intensity of the detected pulse wave of the photoelectric pulse wave detection unit before being pressed by the pressing unit, a warning is issued. And a warning output procedure for outputting the blood pressure measurement device. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure in which the photoelectric pulse wave detection unit and the pressure pulse wave detection unit detect a pulse wave and the sound wave detection unit detects a Korotkoff sound while reducing the pressing force by the pressing unit;
Detection of the photoelectric pulse wave detection unit before the pressing by the pressing unit is the maximum value of the amplitude intensity of the detected pulse wave of the pressure pulse wave detecting unit or the maximum value of the detection signal intensity of the sound wave detecting unit in the detection procedure A warning output procedure for outputting a warning when it is smaller than a predetermined value based on the amplitude intensity of the pulse wave;
A control method for a blood pressure measurement device, comprising: A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A sound wave detector for detecting Korotkoff sounds from the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure for causing the photoelectric pulse wave detection unit to detect a pulse wave and causing the sound wave detection unit to detect Korotkoff sound while reducing the pressing force by the pressing unit;
In the detection procedure, the absolute value of the difference between the pressing force at which the rising point of the envelope of the pulse wave waveform detected by the photoelectric pulse wave detection unit starts to be detected and the pressing force at which the sound wave detection unit starts to detect the Korotkoff sound The pressure of the Korotkoff sound detected by the sound wave detection unit disappears and the slope of the envelope of the waveform of the pulse wave detected by the photoelectric pulse wave detection unit is negative and the envelope A control method for a blood pressure measurement device, comprising: a determination procedure for determining whether an absolute value of a difference from a pressing force that is an inflection point of a line is larger than a predetermined value. A pressing part that can increase or decrease the pressing force on the subject;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A sound wave detector for detecting Korotkoff sounds from the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure in which the pressure pulse wave detection unit detects a pulse wave and the sound wave detection unit detects Korotkoff sound while reducing the pressing force by the pressing unit;
In the detection procedure, the pressure pulse wave detection unit detects the pulse wave and the sound wave detection unit detects Korotkoff sound, and detects the rising point of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit. Whether the absolute value of the difference between the pressing force to start and the pressing force to start detecting the Korotkoff sound by the sound wave detection unit is greater than a predetermined value, or the pressing force at which the Korotkoff sound detected by the sound wave detection unit disappears Judgment is made as to whether or not the slope of the envelope of the pulse wave detected by the pressure pulse wave detector is negative and the absolute value of the difference from the pressing force that is the inflection point of the envelope is greater than a predetermined value The control method of the blood-pressure measuring device characterized by including the judgment procedure to do. A pressing part that can increase or decrease the pressing force on the subject;
A light emitting element that irradiates light to the subject, and a photoelectric pulse wave that detects a pulse wave with a light receiving element that receives light transmitted through the subject or light scattered inside the subject out of light from the light emitting element A detection unit;
A pressure pulse wave detection unit for detecting a pulse wave from vibration of the surface of the subject;
A method for controlling a blood pressure measurement device comprising:
A detection procedure for causing the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave while reducing the pressing force by the pressing unit;
A pressing force that causes the photoelectric pulse wave detection unit and the pressure pulse wave detection unit to detect a pulse wave in the detection procedure and starts detecting a rising point of an envelope of a pulse wave waveform detected by the photoelectric pulse wave detection unit; Whether the absolute value of the difference from the pressing force at which the rising point of the envelope of the pulse wave waveform detected by the pressure pulse wave detection unit starts to be detected is larger than a predetermined value or detected by the photoelectric pulse wave detection unit The slope of the envelope of the pulse wave waveform is negative and the slope of the envelope of the pulse waveform detected by the pressure pulse wave detector and the pressing force that is the inflection point of the envelope is negative and the envelope A control method for a blood pressure measurement device, comprising: a determination procedure for determining whether an absolute value of a difference from a pressing force that is an inflection point of a line is larger than a predetermined value.   The method for controlling a blood pressure measurement device according to any one of claims 16 to 27, wherein the subject is an outer ear of a living body and / or its periphery.   28. The method for controlling a blood pressure measurement device according to any one of claims 16 to 27, wherein the subject is an external auditory canal and / or pinna of a living body. 28. The method of controlling a blood pressure measurement device according to claim 16, wherein the subject is a living tragus and / or its periphery.

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