JP2012024391A - Determining apparatus of measurement position, determining method of measurement position, control program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine an appropriate wearing position of a biological sound sensor for detecting a biological sound.SOLUTION: A measuring apparatus 30 includes: a biological sound extraction part 3 which is put on a biological body and obtains sound data containing a measuring subject sound detected by a sound sensor 20 which detects at least one kind of measuring subject sound generated from the biological body; a position determining part 4 which determines suitability of the wearing position of the sound sensor 20 on the basis of the sound data obtained by the biological sound extraction part 3. The biological sound extraction part 3 obtains a plurality of sound data from the sound sensor 20 which is placed on a different wearing position and the position determining part 4 relatively determines suitability of the sound sensor 20 by mutually comparing measuring subject sounds in which a plurality of sound data contained.

Description

  The present invention relates to a determination device and a determination method for determining the suitability of a mounting position of a sound sensor mounted on a living body.

As a simple test method for sleep apnea syndrome, a pulse oximetry method and a flow sensor method are known. The pulse oximetry method is a method for measuring the presence of apnea by measuring blood oxygen saturation (SpO ₂ ) or pulse. An example of such a method is disclosed in Patent Documents 1 and 2.

  In addition, as disclosed in Patent Document 3, breathing sound, snoring sound, body movement, or body position are measured simultaneously with blood oxygen saturation to improve measurement accuracy. There is also a simple inspection method using a flow sensor that measures the airflow in the mouth or nose.

  Further, in the invention described in Patent Document 1, apnea syndrome is displayed by displaying changes in the apnea index and changes in other related physiological indices (exercise, obesity information, blood pressure, etc.). The subjects are motivated to perform therapy to improve their symptoms.

JP 2008-5964 A (published January 17, 2008) JP 2008-110108 A (published May 15, 2008) JP 2009-240610 A (released on October 22, 2009)

  However, in the conventional configuration, a pulse oximeter is used to measure blood oxygen saturation, and in this case, a sensor is attached to the fingertip. A sensor for measuring breathing sound is attached to the tip of the nose. Therefore, when a subject moves during sleep, there is a possibility that accurate measurement cannot be performed due to a cause such as sensor disconnection.

  The above-mentioned problem is solved by wearing a sensor for detecting a body sound such as a breathing sound on the chest. However, it may be difficult for a user with poor medical knowledge to know where to wear the chest. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a measurement position determination device that determines an appropriate mounting position of a biological sound sensor that detects a biological sound.

  In order to solve the above-described problem, a measurement position determination apparatus according to the present invention is a sound that includes a measurement target sound detected by a biological sound sensor that is attached to a living body and detects at least one type of measurement target sound emitted from the living body. Sound data acquisition means for acquiring data, and determination means for determining suitability of the mounting position of the biological sound sensor based on the sound data acquired by the sound data acquisition means. A plurality of sound data is acquired from the body sound sensor at a position, and the determination unit compares the sound to be measured included in the plurality of sound data acquired by the sound data acquisition unit with each other to determine whether the mounting position is appropriate. It is characterized by determining relatively.

  In order to solve the above problems, a measurement position determination method according to the present invention is a sound that includes a measurement target sound detected by a biological sound sensor that is attached to a living body and detects at least one measurement target sound emitted from the living body. A sound data acquisition step for acquiring data; and a determination step for determining suitability of the mounting position of the biological sound sensor based on the sound data acquired in the sound data acquisition step. In the sound data acquisition step, A plurality of sound data is acquired from the biological sound sensors at different mounting positions, and in the determination step, the measurement target sounds included in the plurality of sound data acquired in the sound data acquisition step are compared with each other, thereby the mounting position It is characterized by relatively determining the suitability of.

  According to said structure, the biological sound sensor which detects the at least 1 type of measuring object sound which a biological body emits is mounted | worn with a biological body, and sound data acquisition means acquires the sound data of the measuring object sound which the said biological sound sensor detected To do. A plurality of sound data of the measurement target sound detected by the body sound sensors at different mounting positions are acquired. The determination unit determines whether or not the mounting position of the biological sound sensor is appropriate by comparing the measurement target sounds included in the plurality of sound data acquired by the sound data acquisition unit.

  Therefore, it is possible to notify the user who does not know where the biological sound sensor should be attached whether or not the attachment position is appropriate.

  Moreover, it is preferable that the said determination means determines the suitability of the said mounting position based on the result of having compared the amplitude of the measurement object sound which the said sound data shows with a predetermined reference value.

  According to the above configuration, the suitability of the mounting position is determined by comparing the amplitude of the measurement target sound at a certain mounting position with the reference value.

  Therefore, even when there is only one position where the biological sound sensor is mounted, it is possible to notify the user whether or not the mounting position is preferable.

  The biological sound sensor detects a plurality of types of measurement target sounds emitted from the living body, and the determination means determines whether the mounting position is appropriate based on the plurality of types of measurement target sounds included in the sound data. Is preferably determined.

  According to said structure, a multiple types of biological sound is detected simultaneously with one biological sound sensor. The determination unit determines whether the mounting position is appropriate based on a plurality of types of measurement target sounds detected by the biological sound sensor. For example, the suitability of the mounting position is determined based on whether or not multiple types of measurement target sounds satisfy a predetermined condition.

  Therefore, even when there are a plurality of measurement target sounds, the user can be notified of a preferred mounting position.

  Moreover, it is preferable that the sound data acquisition means acquires a plurality of sound data respectively obtained from the plurality of biological sound sensors having different mounting positions.

  According to said structure, a some biological sound sensor is mounted | worn with a biological body, and sound data are output from each biological sound sensor. The sound data acquisition means acquires the plurality of sound data output in this way. Then, the determination unit relatively determines which mounting position is more preferable by comparing the measurement target sounds included in the plurality of acquired sound data with each other.

  Therefore, the user can know which position is more preferable (or most preferable) by attaching the biological sound sensor to a plurality of positions as a trial, and can easily know an appropriate mounting position. .

  Moreover, it is preferable that the determination means determines the suitability of the mounting position based on whether the amplitudes of the plurality of types of measurement target sounds have reached a predetermined reference value corresponding to the type of measurement target sound.

  According to the above configuration, the predetermined reference value regarding the amplitude of the measurement target sound is set according to the type of the measurement target sound, and the amplitude of each measurement target sound detected by the biological sound sensor is set to the predetermined reference value. Whether or not the mounting position is appropriate is determined based on whether or not it has been reached.

  Therefore, even when there are a plurality of measurement target sounds, the user can be notified of a preferred mounting position based on the amplitude of each measurement target sound.

  Moreover, it is preferable to further provide a notification unit that notifies the determination result of the determination means.

  With the above configuration, the determination result of the determination unit can be notified to the user.

  Also included in the technical scope of the present invention are a control program for causing a computer to function as each means of the measurement position determination device and a computer-readable recording medium on which the control program is recorded.

  As described above, the measurement position determination device according to the present invention acquires sound data including a measurement target sound detected by a biological sound sensor that is attached to a living body and detects at least one type of measurement target sound emitted from the living body. Sound data acquisition means; and determination means for determining the suitability of the mounting position of the biological sound sensor based on the sound data acquired by the sound data acquisition means, wherein the sound data acquisition means includes the biological data at different mounting positions. A plurality of sound data is acquired from a sound sensor, and the determination unit relatively compares the measurement target sounds included in the plurality of sound data acquired by the sound data acquisition unit with each other to determine whether the mounting position is appropriate. It is the structure which determines.

  The measurement position determination method according to the present invention is a sound data acquisition method for acquiring sound data including a measurement target sound that is detected by a biological sound sensor that is attached to a living body and detects at least one type of measurement target sound emitted from the living body. And a determination step of determining suitability of the mounting position of the biological sound sensor based on the sound data acquired in the sound data acquisition step, wherein the biological sound at a different mounting position in the sound data acquisition step. By acquiring a plurality of sound data from the sensor and comparing the measurement object sounds included in the plurality of sound data acquired in the sound data acquisition step with each other in the determination step, the suitability of the mounting position is relatively determined. It is the structure which determines.

  Therefore, there is an effect that it is possible to notify a user who does not know where to attach the biological sound sensor, whether the mounting position is appropriate.

It is the schematic which shows the structure of the measuring device which concerns on one Embodiment of this invention. It is sectional drawing which shows the structure of the sound sensor with which the said measuring device is provided. (A) is a figure for demonstrating the maximum value setting method, (b) is a figure which shows an example of the determination sound which changes as it approaches the maximum amplitude value. It is a flowchart which shows an example of the flow of a process in the said measuring device. It is the schematic which shows the structure of the measuring device which concerns on another embodiment of this invention. It is a flowchart which shows an example of the flow of a process in the said measuring device.

[Embodiment 1]
The following describes one embodiment of the present invention with reference to FIGS. In the present embodiment, a measurement device (measurement position determination device) 30 that detects an apnea state will be described. However, the present invention is not limited to a measurement device that detects an apnea state, and is attached to a subject (living body). Any measuring device provided with a sound sensor for detecting sound may be used, and the present invention can also be applied to a measuring device for detecting symptoms other than apnea.

  In the following description, the measurement device 30 is described as being operated by a subject, but may be operated by a user such as a medical staff other than the subject.

  The measuring device 30 guides the subject to attach the sound sensor 20 to an appropriate position by notifying the subject of the preference of the attachment position of the sound sensor (biological sound sensor) 20 by a determination sound or the like. FIG. 1 is a schematic diagram illustrating the configuration of the measurement device 30. As shown in the figure, the measurement device 30 includes an analysis device 1 and a sound sensor 20.

<Sound sensor 20>
The sound sensor 20 is a close-contact microphone that is attached to the subject's chest and the like and detects a breathing sound emitted by the subject. As the sound sensor 20, for example, a contact microphone described in JP 2009-233103 A can be used. FIG. 2 is a cross-sectional view showing the configuration of the sound sensor 20. As shown in the figure, the sound sensor 20 is a so-called condenser microphone type sound collecting unit. The sound sensor 20 is a columnar housing portion 21 having one end surface opened, and a housing so as to close the opening surface of the housing portion 21. A diaphragm 23 in close contact with the body 21 is provided. The sound sensor 20 includes a substrate 28 on which the first conversion unit 25 and the second conversion unit 27 are mounted, and a battery unit 29 that supplies power to the first conversion unit 25 and the second conversion unit 27.

  An adhesive layer 24 is provided on the surface of the diaphragm 23, and the sound sensor 20 is attached to the body surface (H) of the subject by the adhesive layer 24. The mounting position of the sound sensor 20 is, for example, the chest and may be a location where the breathing sound can be effectively picked up.

  When the patient emits a body sound by performing coughing, breathing, swallowing, or the like, the diaphragm 23 minutely vibrates in accordance with the wavelength of the body sound. The minute vibrations of the diaphragm 23 are propagated to the first converter 25 through the conical air chamber wall 26 whose upper and lower surfaces are opened.

  The vibration transmitted through the air chamber wall 26 is converted into an electrical signal by the first conversion unit 25, converted into a digital signal by the second conversion unit 27, and is converted into a biological signal as biological sound data. 3 is transmitted.

  The sound sensor 20 and the analysis device 1 may be connected so as to be communicable, may be connected by wire, or may be connected wirelessly. However, wireless connection is preferable because the wiring does not get in the way. In addition, the analysis device 1 may be built in the sound sensor 20.

  Moreover, the sound sensor 20 should just be mounted | worn with the location which can pick up a measurement object sound, and should just be mounted | worn to abdomen when picking up abdominal sound.

<Analyzer 1>
The analysis device 1 detects the apnea state of the subject using the biological sound data transmitted from the sound sensor 20. As shown in FIG. 1, the analysis device 1 includes a main control unit 2, a storage unit 7, an operation unit 8, a display unit 9, and a speaker (notification unit) 10, and the main control unit 2 is a biological sound extraction unit. (Sound data acquisition means) 3, position determination unit (determination unit) 4, symptom detection unit 5, and data analysis unit 6 are provided.

<Body sound extraction unit 3>
The body sound extraction unit 3 receives the body sound data transmitted from the sound sensor 20, and extracts the body sound (measurement target sound) to be measured from the body sound data. In the present embodiment, the biological sound extraction unit 3 extracts a low-frequency (7 Hz or less) signal (referred to as a respiratory sound signal) that reflects the respiratory action from the biological sound data.

<Position determination unit 4>
The position determination unit 4 determines whether the mounting position of the sound sensor 20 is appropriate based on the body sound data acquired by the body sound extraction unit 3. More specifically, the position determination unit 4 relatively determines the suitability of the sound sensor 20 by comparing the measurement target sounds extracted by the biological sound extraction unit 3 with each other (first determination method). Alternatively, the position determination unit 4 determines the suitability of the mounting position of the sound sensor 20 based on the result of comparing the amplitude of the measurement target sound extracted by the biological sound extraction unit 3 with a predetermined reference value (second determination method) ).

(First determination method)
In the first determination method, when searching for an optimal mounting position by changing the mounting position of one sound sensor 20, the amplitude of the measurement target sound at the current mounting position and the measurement target sound at the previous mounting position are determined. Compare the amplitude of. When the current amplitude is larger than the previous amplitude, the determination sound generation interval is shortened, and vice versa.

  Moreover, you may receive biological sound data from the several sound sensor 20 from which an attachment position differs, respectively. In this case, the position determination unit 4 compares the measurement target sounds extracted from each body sound data with each other, and specifies information (such as the number of the sound sensor 20) that identifies the sound sensor 20 from which the measurement target sound having the largest amplitude is obtained. ) Is displayed on the display unit 9.

(Second determination method)
In the second determination method, the position determination unit 4 compares the amplitude range (amplitude level) determined in advance with the amplitude of the measurement target sound extracted by the biological sound extraction unit 3, and determines the measurement target sound. It is determined which amplitude level the amplitude of corresponds to. And the position determination part 4 controls the speaker 10 so that the determination sound according to the determined amplitude level may be output.

  The amplitude level is set, for example, in three stages, and is set so that the interval between determination sounds becomes shorter in order of increasing amplitude.

  One reference value may be compared with the amplitude of the measurement target sound, and this reference value is, for example, a value corresponding to the minimum amplitude necessary for detecting the symptom to be detected.

  Moreover, since the volume (amplitude) of the body sound generated by the subject is different, the range or maximum value of the amplitude may be determined for each subject. Therefore, a reference value setting mode for determining a reference value for setting a preferable amplitude range or a maximum value setting mode for setting a maximum value of amplitude may be provided.

  FIG. 3A is a diagram for explaining a maximum value setting method. In the maximum value setting mode, the subject causes the sound sensor 20 to pick up the body sound while changing the mounting position of the sound sensor 20 on the human body 50. The biological sound extraction unit 3 sequentially extracts biological sounds from the biological sound data transmitted from the sound sensor 20 and outputs them to the position determination unit 4. The position determination unit 4 measures the amplitude of the received biological sound and stores the amplitude value in the storage unit 7.

  When the maximum value setting mode ends, the position determination unit 4 stores the maximum amplitude value among the plurality of amplitude values stored in the storage unit 7 in the storage unit 7 as the maximum amplitude value of the subject.

  When determining whether or not the mounting position of the sound sensor 20 is appropriate, the position determination unit 4 causes the amplitude value of the biological sound output from the sound sensor 20 to approach the maximum amplitude value as shown in FIG. As a result, the interval of the judgment sound is shortened. FIG. 3B is a diagram illustrating an example of the determination sound that changes as the maximum amplitude value is approached.

  On the other hand, in the reference value setting mode, for example, a value obtained by subtracting a predetermined value from the maximum value of the amplitude value acquired from the subject is used as a reference value, and the subject is notified whether the reference value is exceeded.

  Such a reference value (or maximum value) setting function may be provided to the position determination unit 4, or a reference value setting unit (or maximum value setting unit) different from the position determination unit 4 may be provided. Alternatively, a reference value (or maximum value) setting mode may be provided for a predetermined time, and a normal mode for automatically determining the mounting position after a predetermined time may be shifted.

<Symptom detection unit 5>
The symptom detection unit 5 detects a specific symptom by analyzing the amplitude, generation pattern, and the like of the measurement target sound extracted by the biological sound extraction unit 3. In the present embodiment, the symptom detection unit 5 detects an apnea state. For example, the symptom detection unit 5 determines that the patient is in an apnea state when a breathing sound having an amplitude greater than or equal to a predetermined amplitude is not detected for 10 seconds or more. The detection result of the symptom is stored in the storage unit 7 as detection record data together with information on the date and time when the symptom is detected.

  Note that the symptom detection unit 5 may set the detection threshold of the breathing sound to two levels and detect the apnea state and the hypopnea state separately. Apnea means that the airflow in the mouth and nose stops for 10 seconds or more, and hypopnea means a state in which the ventilation volume is reduced by 50% or more for 10 seconds or more.

  When the measurement device 30 is realized as a device for detecting symptoms other than apnea syndrome, the symptom detection unit 5 may detect the detection target symptom from the measurement target sound. For example, symptoms such as valvular heart disease, congenital heart disease, and heart failure may be detected from heart sounds, and symptoms such as pneumothorax, bronchial asthma, and obstructive pulmonary disease may be detected from abnormal sounds of respiratory sounds. In addition, symptoms such as intestinal noise (intestinal obstruction), low bowel noise (decreased function), high bowel noise (hyperfunctional bowel noise) may be detected from abdominal sounds (intestinal noise). If the bowel sounds disappear after symptoms of high bowel noise are seen, it can be very severe and can lead to necrosis of the intestinal tissue. High bowel noise also begins as an intestinal response to disease.

  A method for detecting each symptom described above in the symptom detection unit 5 may be a known method and is not directly related to the essence of the present invention, and thus the description thereof is omitted.

<Data analysis unit 6>
The data analysis unit 6 analyzes the detection record data stored in the storage unit 7 in the medium and long term, and creates a graph or the like showing changes in the symptoms of the subject. The processing of the data analysis unit 6 may be performed at any time according to the test subject's instruction, or may be performed periodically.

  For example, the data analysis unit 6 may determine the long-term change in the frequency of occurrence of apnea, physiological indices (weight, blood pressure, daytime sleepiness, etc.) related to apnea and / or lifestyle of the subject. By displaying a graph or the like together with changes (such as momentum), it may be indicated how much the symptoms of apnea syndrome have been improved by changes in the lifestyle of the subject. Information regarding the physiological index and lifestyle may be input by the subject through the operation unit 8 and stored in the storage unit 7.

  Further, the data analysis unit 6 may generate information such as how many apneas have occurred during sleeping on a specified day according to the test subject's instructions by analyzing the detection record data. For example, sleep apnea, such as mild when 5 to 14 breaths have stopped for 10 seconds or more in an hour, moderate when 15 to 29, and severe when 30 or more. Symptoms of the syndrome may be indicated by stage. The number of apneas may be displayed on the display unit 9 in the form of a numerical value, a graph, a table, or the like.

  In addition, sleep apnea syndrome is: “An apnea state of 10 seconds or more occurs during sleep (7 hours) more than 30 times, or there are 5 apneas or hypopneas per hour of sleep. It is defined as having symptoms that occur.

  In addition, apnea hypopnea index (AHI), which is the sum of the number of apneas per hour and the number of hypopneas (AHI) is 5 or more, and is accompanied by symptoms such as daytime hypersomnia There is also a definition of sleep apnea syndrome.

  In addition, although this definition does not apply, there may be cases in which insomnia is complained by repeating hypopnea, and in such cases, the patient's snoring and bruxism are often severe, so it is called “snoring / growth insomnia”.

<Storage unit 7>
The storage unit 7 records (1) a control program for each unit, (2) an OS program, (3) an application program, and (4) various data to be read when these programs are executed. Is. The storage unit 7 is configured by a nonvolatile storage device such as a hard disk or a flash memory.

  In addition, in order to preserve | save biological sound data, the memory | storage device which can be attached or detached may be provided in the analyzer 1. FIG.

<Operation unit 8>
The operation unit 8 is an input device for inputting various set values or inputting various commands to the analysis apparatus 1, and is, for example, an input button or a changeover switch.

<Display unit 9>
The display unit 9 displays setting information or analysis results of the analysis apparatus 1 and is, for example, a liquid crystal display.

<Speaker 10>
The speaker 10 is a notifying unit that notifies the user of the appropriateness of the mounting position of the sound sensor 20 and emits a sound (referred to as a determination sound) according to the determination result of the position determination unit 4, thereby The user is notified of the degree of preference.

  This judgment sound indicates the suitability of the mounting position by the interval at which the sound is emitted, the volume, the tone color, or the like. For example, when the mounting position is not preferable, the interval between the determination sounds may be increased ("pip ..., beep ..., beep ..."), and when the mounting position is preferable, the interval between the determination sounds may be decreased ("Pi, Pi, Pi "). Alternatively, the tone of the determination sound may be lowered when the mounting position is not preferable, and the tone of the determination sound may be increased when the mounting position is preferable. Alternatively, the volume or melody of the determination sound may be changed according to the preference of the wearing position, or the preference of the wearing position may be notified by voice.

  Further, the interval between the determination sounds may be shortened as the amplitude of the body sound obtained from the sound sensor 20 approaches the preset maximum amplitude value.

  Moreover, you may show the preference of a mounting position with the lighting pattern or luminescent color of a light-emitting device (for example, light emitting diode). Moreover, you may show the preference of a mounting position with a character and a figure in the display part 9. FIG. Further, the sound sensor 20 may be vibrated according to the preference of the mounting position. In these cases, the light emitting device, the display unit 9 or the sound sensor 20 serves as a notification unit.

  Further, the speaker 10 may be built in the sound sensor 20.

(Processing flow in the measuring device 30)
Next, an example of a process flow (measurement position determination method) in the measurement apparatus 30 will be described. FIG. 4 is a flowchart illustrating an example of a process flow in the measurement apparatus 30. Here, a description will be given of a configuration in which determination sound intervals are set by the above-described second determination method when searching for an optimal mounting position by changing the mounting position of one sound sensor 20.

  As shown in FIG. 4, first, the sound sensor 20 attached to the subject's chest continuously monitors the body sound (S1), and the body sound data including the detected body sound is converted into the body sound of the analysis apparatus 1. Output to the extraction unit 3.

  When the body sound extraction unit 3 receives the body sound data (sound data acquisition step), the body sound extraction unit 3 extracts a signal (breathing sound signal) of 7 Hz or less from the body sound data and outputs the extracted breathing sound signal to the position determination unit 4. (S2).

  The position determination unit 4 determines whether the amplitude of the respiratory sound signal extracted by the body sound extraction unit 3 is included in a predetermined amplitude range (determination step), and corresponds to the determined amplitude range. The speaker 10 is controlled so that the judgment sound is output (S3).

  And the determination sound which the position determination part 4 set is output from the speaker 10 (S4).

  Here, when the subject changes the mounting position of sound sensor 20 (NO in S5), the processing from step S1 to S4 is repeated.

  When the subject determines the mounting position of the sound sensor 20 (YES in S5) and inputs a command for starting monitoring of apnea, the biological sound extraction unit 3 extracts a respiratory sound signal from the biological sound data, The extracted respiratory sound signal is output to the symptom detection unit 5. The symptom detector 5 starts monitoring apnea for the received respiratory sound signal (S6).

  The symptom detection unit 5 determines that the patient is in an apnea state when a respiratory sound signal having an amplitude equal to or greater than a predetermined amplitude is not detected for 10 seconds or more (YES in S7). Detection record data including information and the time when the apnea state has continued is created and stored in the storage unit 7 (S8).

  Thereafter, the detection record data stored in the storage unit 7 is analyzed by the data analysis unit 6.

(Effect of measuring device 30)
As described above, the measurement device 30 determines an appropriate mounting position of the sound sensor 20 based on the respiratory sound actually detected by the sound sensor 20, and allows a subject who does not know where the sound sensor 20 should be mounted. On the other hand, the preference of the mounting position can be notified. Therefore, it is possible to assist the subject to perform measurement more accurately.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. In addition, about the member similar to Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The measuring device 40 of the present embodiment detects an apnea state from heart sounds and breathing sounds, and the sound sensor 20 detects heart sounds and breathing sounds (a plurality of types of measurement target sounds) emitted by the subject. .

  The sound sensor 20 is mounted between the chest and throat in order to detect heart sounds and breathing sounds, but the configuration may be the same as that shown in FIG.

  FIG. 5 is a schematic diagram showing the configuration of the measuring device 40 of the present embodiment. As shown in the figure, the measuring device 40 includes a biological sound extraction unit (sound data acquisition unit) 41 instead of the biological sound extraction unit 3, and a position determination unit (determination unit) 44 instead of the position determination unit 4. I have.

<Body sound extraction unit 41>
The body sound extraction unit 41 includes a heart sound extraction unit 42 and a respiratory sound extraction unit 43.

  The heart sound extraction unit 42 receives the body sound data transmitted from the sound sensor 20 and extracts a heart sound (heart sound) from the body sound data. In the case of a normal heart sound, it has two frequencies, 30 Hz and 70 Hz, as intrinsic frequencies, and the heart sound extraction unit 42 extracts these 30 Hz and 70 Hz signals.

  The breathing sound extraction unit 43 extracts the breathing sound from the body sound data in the same manner as the body sound extraction unit 3.

<Position determination unit 44>
The position determination unit 44 determines the suitability of the mounting position of the sound sensor 20 based on whether or not a plurality of types of measurement target sounds included in the biological sound data satisfy a predetermined condition. Specifically, the position determination unit 44 determines whether the amplitude of the heart sound extracted by the heart sound extraction unit 42 has reached a reference value set in advance for the heart sound, and the respiratory sound extracted by the breathing sound extraction unit 43. The suitability of the mounting position of the sound sensor 20 is determined based on whether the amplitude has reached a reference value set in advance for the breathing sound. Furthermore, the position determination unit 44 compares determination scores at a plurality of mounting locations (or a plurality of sound sensors 20 with different mounting locations) with each other, and determines a more preferable mounting location.

  For example, if the judgment score is set in three stages, the score “3” (optimum) is set when both the amplitudes of the heart sound and the breathing sound reach the reference value, and the score “2” is set when only one of them reaches the reference value. When both have not reached the reference value, the score “1” is set, and the determination sound corresponding to each score may be output from the speaker 10. Further, the determination score may be four or more levels, and a plurality of levels of reference values for the amplitudes of heart sounds and breathing sounds may be provided according to the amplitudes.

  Or the position determination part 44 may change the light emission mode of a light-emitting device (for example, LED (Light Emitting Diode)) (not shown) according to a determination score. Specifically, for example, for each of the heart sound and the breathing sound, two determination scores are set, and an LED indicating the heart sound determination score and an LED indicating the breathing sound determination score are provided. Then, the position determination unit 44 lights the LED in green when the heart sound or breathing sound exceeds the reference value, and lights in red when the sound does not exceed the reference value.

  Therefore, when both the heart sound and the breathing sound exceed the reference value, the two LEDs are lit in green. When either one does not reach the reference value, it lights up in red / green or green / red.

  Similarly to the first embodiment, a reference value setting mode for determining a reference value for determining a preferable amplitude range for each subject, or a maximum value setting mode for setting a maximum amplitude value may be provided.

<Symptom detection unit 5>
The symptom detection unit 5 detects the apnea state (and the degree thereof) by analyzing the amplitude, generation pattern, and the like of the heart sound extracted by the heart sound extraction unit 42 and the breathing sound extracted by the breathing sound extraction unit 43. If apnea is reached, the oxygen saturation in arterial blood decreases, and the heart rate increases accordingly. Therefore, it may be determined that the patient is in an apnea state when the breathing sound is smaller than the predetermined reference value and the heart rate is increased above the predetermined reference value.

(Processing flow in the measuring device 40)
Next, an example of the flow of processing in the measuring device 40 will be described. FIG. 6 is a flowchart illustrating an example of a processing flow in the measurement device 40.

  As shown in FIG. 6, first, the sound sensor 20 attached to the subject's chest continuously monitors the body sound (S11), and the body sound data including the body sound is extracted from the body sound of the analyzer 1. Output to the unit 41.

  Upon receiving the body sound data, the heart sound extraction unit 42 of the body sound extraction unit 41 extracts signals of 30 Hz and 70 Hz (heart sound signal) from the body sound data, and outputs the extracted heart sound signal to the position determination unit 44 ( S12).

  On the other hand, when receiving the body sound data, the breathing sound extraction unit 43 extracts a signal (breathing sound signal) of 7 Hz or less from the body sound data, and outputs the extracted breathing sound signal to the position determination unit 44 (S13). .

  The position determination unit 44 determines whether or not the amplitude of the heart sound signal extracted by the heart sound extraction unit 42 has reached a reference value set in advance for the heart sound, and the amplitude of the respiratory sound signal extracted by the breathing sound extraction unit 43. A determination sound is set based on whether or not a preset reference value for the breathing sound has been reached, and the speaker 10 is controlled to output the determination sound (S14).

  Then, the determination sound set by the position determination unit 44 is output from the speaker 10 (S15).

  Here, when the subject changes the mounting position of sound sensor 20 (NO in S16), the processing from steps S11 to S15 is repeated. At this time, the position determination unit 44 stores the determination score calculated at each mounting position in the storage unit 7 in time series, and the determination score at the mounting position at a certain time is higher than the determination score at the previous mounting position. In such a case, the fact may be notified to the subject by shortening the interval between the judgment sounds. Conversely, when the determination score at the mounting position at a certain point is lower than the determination score at the previous mounting position, the fact may be notified to the subject by increasing the interval of the determination sound.

  On the other hand, when the subject determines the mounting position of the sound sensor 20 (YES in S16) and inputs a command to start monitoring of apnea, the biological sound extraction unit 3 extracts the heart sound signal and the respiratory sound signal from the biological sound data. And the extracted signal is output to the symptom detection unit 5. The symptom detection unit 5 determines the presence or absence of an apnea state from the received heart sound signal and respiratory sound signal (S17).

  When an apnea state is detected (YES in S18), the symptom detection unit 5 creates detection record data including information on the date and time when the apnea state is detected and the degree of the symptom, and stores it in the storage unit 7 (S19).

  Since the method of using the detected record data stored in the storage unit 7 is the same as that in the first embodiment, the description thereof is omitted.

(Example of change)
Two sound sensors 20 may be provided in the measuring device 40, one sound sensor 20 may detect a respiratory sound, and the other sound sensor 20 may detect a heart sound. In this case, the preference of the mounting position of the sound sensor 20 for detecting respiratory sounds and the preference of the mounting position of the sound sensor 20 for detecting heart sounds are separately determined and notified to the subject. Since breathing sounds and heart sounds have different frequencies, it is possible to distinguish which sound is picked up by the frequency. Therefore, it is not always necessary to distinguish the two sound sensors 20 for detecting respiratory sounds and detecting heart sounds.

  In addition, the measuring device 40 may measure the presence / absence or degree of a disease related to a heart disease from a heart sound by using one sound sensor 20, and may also measure the presence / absence or the degree of a disease related to a respiratory organ from a respiratory sound. . That is, one type of symptom may be detected from two types of body sounds, or two types of symptoms may be detected from two types of body sounds.

(Effect of measuring device 40)
As described above, the measurement device 40 can notify the subject of the preferred mounting position of the sound sensor 20 even when two types of biological sounds are detected by the single sound sensor 20, and even a subject who does not know the preferred mounting position. Appropriate measurements can be taken.

(Other changes)
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  For example, the present invention may be applied to animals other than humans, and may be used to detect the pathology of pets and livestock. That is, in the present invention, the target to which the biological sound sensor is attached is not limited to a human (subject) but includes a living body including a human.

  Moreover, each block of the measuring device 30 and the measuring device 40 described above, particularly the main control unit 2 of the analyzing device 1 may be configured by hardware logic, or realized by software using a CPU as follows. Also good.

  In other words, the measuring device 30 and the measuring device 40 include a central processing unit (CPU) that executes instructions of a control program that realizes each function, a read only memory (ROM) that stores the program, and a RAM (random) that expands the program. access memory), a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is to program the program code (execution format program, intermediate code program, source program) of the control program (measurement position determination program) of the measuring device 30 and the measuring device 40, which is software that realizes the functions described above. This can also be achieved by supplying the recording medium recorded in a readable manner to the measuring device 30 and the measuring device 40 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU). It is.

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the measurement device 30 and the measurement device 40 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR (high data rate), mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention can also be expressed as follows.

  That is, the physical information measuring device of the present invention is characterized by comprising means for acquiring an optimal measurement position for observing a specific health condition.

  Moreover, it is preferable that the said physical information measuring device accumulate | stores the detected value of the means with which the own apparatus was equipped, and makes the position where the detected value is the maximum into an optimal measurement position.

  Moreover, it is preferable to improve the observation accuracy of the health condition by providing a plurality of acquisition means.

  Moreover, it is preferable that the said physical information measuring device displays a state change by accumulating the data acquired by the own apparatus.

  Moreover, it is preferable that the said physical information measuring device can display the improvement degree of a health condition with the data acquired by the own apparatus, and the input action information.

  Moreover, it is preferable that the said physical information measuring device presents how many times the apnea state was during sleeping.

  Moreover, it is preferable that the said physical information measuring device receives input, such as a weight or oversleeping during the day.

  The present invention can inform a user of a preferred mounting position of a biological sound sensor, and thus can be applied to a diagnosis device, a health management device, and the like handled by a general user who does not have specialized knowledge.

1 Analysis device (measurement position determination device)
4 Position determination unit (determination means)
9 Display part (notification part)
10 Speaker (notification part)
20 sound sensor (biological sound sensor)
30 Measuring device (Measurement position determination device)
40 Measuring device (Measurement position determination device)
44 Position determination unit (determination means)
50 human body (subject)

Claims (9)

Sound data acquisition means for acquiring sound data including a measurement target sound detected by a biological sound sensor that is attached to a living body and detects at least one type of measurement target sound emitted from the living body;
Determination means for determining the suitability of the mounting position of the biological sound sensor based on the sound data acquired by the sound data acquisition means,
The sound data acquisition means acquires a plurality of sound data from the biological sound sensor at different mounting positions,
The determination means relatively determines whether or not the mounting position is appropriate by comparing measurement target sounds included in a plurality of sound data acquired by the sound data acquisition means with each other. .   The measurement position determination apparatus according to claim 1, wherein the determination unit determines whether the mounting position is appropriate based on a result of comparing the amplitude of the measurement target sound indicated by the sound data with a predetermined reference value. . The biological sound sensor detects a plurality of types of measurement target sounds emitted from the living body,
The measurement position determination apparatus according to claim 1, wherein the determination unit determines whether the mounting position is appropriate based on a plurality of types of measurement target sounds included in the sound data.   The measurement position determination according to any one of claims 1 to 3, wherein the sound data acquisition means acquires a plurality of sound data respectively obtained from a plurality of the body sound sensors having different mounting positions. apparatus.   The determination means determines whether or not the mounting position is appropriate based on whether or not the amplitudes of the plurality of types of measurement target sounds have reached a predetermined reference value corresponding to the type of measurement target sound. Item 4. The measurement position determination device according to Item 3.   The measurement position determination apparatus according to claim 1, further comprising a notification unit that notifies a determination result of the determination unit. A sound data acquisition step of acquiring sound data including the measurement target sound detected by the biological sound sensor that is mounted on the living body and detects at least one type of measurement target sound emitted from the living body;
A determination step of determining suitability of the mounting position of the biological sound sensor based on the sound data acquired in the sound data acquisition step,
In the sound data acquisition step, a plurality of sound data are acquired from the biological sound sensors at different mounting positions,
In the determination step, a measurement position determination method characterized by relatively determining whether or not the mounting position is appropriate by comparing the measurement target sounds included in the plurality of sound data acquired in the sound data acquisition step with each other. .   The control program for functioning a computer as each means of the measurement position determination apparatus of any one of Claim 1-6. A computer-readable recording medium on which the control program according to claim 8 is recorded.

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