JP2006102150A - Blood pressure measuring device, blood pressure measuring method, control program, and computer-readable storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood pressure measuring device capable of adjusting a signal level so that the signal level of pulse wave signals is within a prescribed standard range for appropriately measuring the blood pressure in a blood pressure measuring region, and reducing the physical burden on a user caused by the cuff pressure by reducing the blood pressure measuring time. <P>SOLUTION: The blood pressure measuring device comprises a detecting means for detecting pulse wave signals of the blood in a blood vessel, a level adjusting means for adjusting the signal level of the pulse wave signals, and a blood pressure measurement control means for making the level adjusting means adjust the signal level within a prescribed range if the signal level of the pulse wave signals is out of the prescribed standard range and measuring the blood pressure when the cuff pressure is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a level adjustment of a pulse wave signal in a blood pressure measurement device, particularly a blood pressure measurement device that measures blood pressure based on a pulse wave signal.

In a blood pressure measurement device that measures blood pressure based on a conventional pulse wave signal, if the pulse wave signal level is low or highly saturated for any reason, an appropriate blood pressure measurement cannot be performed. Output a signal to prompt the change of the cuff attachment position and perform re-measurement, or perform signal level adjustment by signal amplification etc. by the method disclosed in Patent Document 1, and then pressurize again to measure blood pressure It was.
Japanese Patent Publication No. 6-18555

  However, if the pulse wave signal level is low or highly saturated for some reason, change the appropriate cuff attachment position or set an appropriate signal adjustment value and then remeasure. There was annoyance that had to be done. As a result, the person to be measured required multiple measurements, that is, compression with multiple cuffs, which was a physical burden.

  The present invention has been made in view of the above problems, and in order to enable appropriate blood pressure measurement, it is possible to adjust the signal level so that the signal level of the pulse wave signal is within a predetermined standard range, and at the same time, blood pressure measurement. The present invention provides a blood pressure measurement device and a blood pressure measurement method that make it possible to reduce the physical burden on the user due to the cuff pressure by shortening the time.

  In order to solve this problem, a blood pressure measurement device according to the present invention is attached to an appropriate place for measuring blood pressure, a cuff for compressing the blood pressure, detection means for detecting a pulse wave signal due to blood in the blood vessel, When the blood pressure is measured from the pulse wave signal detected by the detection means when the cuff is pressurized and the level adjustment means for adjusting the signal level of the pulse wave signal, and the signal level of the pulse wave signal is outside the predetermined range, Blood pressure measurement control means for adjusting the signal level to be within a predetermined range by the level adjusting means and measuring the blood pressure when the cuff is decompressed.

  Then, the blood pressure measurement control means ends the blood pressure measurement immediately when the signal level of the pulse wave signal detected by the level detection means is within a predetermined range.

  A blood pressure measuring device according to the present invention is mounted at a proper place for measuring blood pressure, a cuff for compressing the blood pressure, a detecting means for detecting a pulse wave signal due to blood in the blood vessel, and adjusting the signal level of the pulse wave signal If the signal level of the pulse wave signal detected by the detecting means before or during pressurization of the cuff is outside the predetermined range, the signal level is set within the predetermined range by the level adjusting means. Blood pressure measurement control means for adjusting the pressure and continuously pressurizing the cuff to measure the blood pressure.

  In the blood pressure measurement device according to the present invention, blood pressure at a plurality of different locations is measured. The pulse wave signal detected by the detecting means is a photoelectric pulse wave signal obtained by absorption and reflection of light by blood in the blood vessel.

  Further, the level adjusting means includes a light quantity adjusting means for adjusting the output light quantity from the light emitting element and a gain setting means for adjusting the signal level from the light receiving element, and the signal level of the pulse wave signal detected by the level detecting means is When it is outside the predetermined range, the signal level is adjusted so as to be within the predetermined range by at least one of the light amount setting means and the gain setting means.

  In order to solve this problem, a blood pressure measurement method according to the present invention includes a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached to an appropriate place for blood pressure measurement, If the blood pressure is measured from the pulse wave signal detected by the detection step when the cuff is pressurized and the signal level of the pulse wave signal is outside the predetermined range, the level adjustment step for adjusting the signal level A blood pressure measurement control step of adjusting the signal level to be within a predetermined range and measuring the blood pressure when the cuff is decompressed.

  Then, the blood pressure measurement control method immediately ends the blood pressure measurement when the signal level of the pulse wave signal detected by the level detection step is within a predetermined range.

  A blood pressure measurement method according to the present invention includes a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached to a blood pressure measurement site, a level adjustment step of adjusting the signal level of the pulse wave signal, and a cuff. If the signal level of the pulse wave signal detected by the detection step before or during pressurization is outside the predetermined range, the level adjustment step is performed to adjust the signal level to be within the predetermined range. And a blood pressure measurement control step of measuring the blood pressure by pressurizing the cuff.

  In the blood pressure measurement method according to the present invention, blood pressure at a plurality of different locations is measured.

  The pulse wave signal detected by the detection step is a photoelectric pulse wave signal obtained by absorption and reflection of light by blood in the blood vessel.

  Furthermore, the level adjustment step includes a light amount adjustment step for adjusting the output light amount from the light emitting element and a gain setting step for adjusting the signal level from the light receiving element, and the signal level of the pulse wave signal detected by the level detection step is If it is outside the predetermined range, the signal level is adjusted to be within the predetermined range by at least one of the light amount setting step and the gain setting step.

  In order to solve this problem, a blood pressure measurement control program according to the present invention executes a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached at a proper position for blood pressure measurement. Blood pressure is detected from a program code, a program code for executing a level adjustment process for adjusting the signal level of the pulse wave signal, and a pulse wave signal detected by the program code for executing a detection process when the cuff is pressurized. If the signal level of the pulse wave signal is outside the predetermined range, the blood pressure measurement control step of adjusting the signal level to be within the predetermined range by the level adjustment step and measuring the blood pressure when the cuff is decompressed And a program code for executing.

  Further, the control program immediately ends the blood pressure measurement when the signal level of the pulse wave signal detected by the program code for executing the level detection step is within a predetermined range.

  The control program according to the present invention includes a program code for executing a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached at an appropriate position for measuring blood pressure, and a signal level of the pulse wave signal The signal level of the pulse wave signal detected by the program code for executing the level adjusting step for adjusting the level and the program code for executing the detecting step before or during pressurization of the cuff is outside a predetermined range. If there is, the program code for executing the blood pressure measurement control step for adjusting the signal level within the predetermined range by the program code for executing the level adjustment step and subsequently pressurizing the cuff to measure the blood pressure And.

The control program according to the present invention is characterized by measuring blood pressure at a plurality of different locations.
The pulse wave signal detected by the program code for executing the detection step is a photoelectric pulse wave signal obtained by light absorption and reflection by blood in the blood vessel.

  Furthermore, the program code for executing the level adjusting process is for executing the light intensity adjusting process for adjusting the light intensity output from the light emitting element and the gain setting process for adjusting the signal level from the light receiving element. If the signal level of the pulse wave signal detected by the program code for executing the level detection process is outside the predetermined range, the program code for executing the light amount setting process and the gain setting The signal level is adjusted so as to be within a predetermined range by at least one of the program codes for executing the process.

  Further features of the present invention will become apparent from the following best mode for carrying out the invention and the accompanying drawings.

  According to the present invention, the signal level can be adjusted so that the signal level of the pulse wave signal falls within a predetermined standard range in order to enable appropriate blood pressure measurement at an appropriate place for measuring blood pressure. In addition, it is possible to provide a blood pressure measurement device that can reduce the physical burden on the user due to the cuff pressure by enabling the blood pressure measurement time to be shortened.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the constituent elements described in this embodiment are merely examples, and are not intended to limit the scope of the present invention only to them.

(First embodiment)
As a first embodiment of the electronic sphygmomanometer according to the present invention, a photoelectric volume pulse sphygmomanometer will be described below as an example.

<Device configuration>
FIG. 1 is a block diagram showing the configuration of the photoelectric volume pulse wave sphygmomanometer of the embodiment. In the figure, 1 is a cuff and is fixed to a blood pressure measurement site. Reference numeral 2 denotes an air tube that forms a flow path of air into the cuff 1. Reference numeral 3 denotes a pressure pump that feeds pressurized air into the cuff 1. 4 is a rapid discharge valve, which rapidly reduces the pressure in the cuff 1. Reference numeral 5 denotes a fine exhaust valve, which reduces the pressure in the cuff 1 at a constant speed (for example, 2 to 3 mmHg / sec). Reference numeral 6 denotes a pressure sensor, which changes an electrical parameter according to the pressure in the cuff 1. A pressure detection amplifier (AMP) 7 detects an electrical parameter of the pressure sensor 6, converts it into an electrical signal, amplifies it, and outputs an analog cuff pressure signal P.

  Reference numeral 8 denotes a pulse wave sensor installed in the cuff 1, which includes an LED 8a that irradiates light to a pulsating vascular blood flow, and a phototransistor 8b that detects reflected light from the vascular blood flow (FIG. 2). A pulse wave detection amplifier (AMP) 9 amplifies the output signal of the phototransistor 8b and outputs an analog pulse wave signal M. Here, the LED 8a is connected to a light amount control unit 18 that automatically changes the light amount, and the pulse wave detection amplifier 9 includes a gain control unit 19a that automatically changes the gain and a pulse wave detection filter / amplifier 9. A time constant control unit 19b that changes the time constants of the filter amplifiers 91 and 92 described later is connected. An A / D converter (A / D) 10 converts analog signals M and P (not shown) into digital data D (not shown).

  Reference numeral 11 denotes a control unit (CPU) which performs main control of the present photoelectric volume pulse wave sphygmomanometer. The CPU 11 has an adjustment pressure register 11a that stores the adjustment pressure. Details of this control will be described later with reference to the flowcharts of FIGS. Reference numeral 12 denotes a ROM, which stores a program that is executed by the CPU 11 and performs, for example, the control shown in FIGS. A RAM 13 includes a data memory, an image memory, and the like. A liquid crystal display (LCD) 14 displays the contents of the image memory. Reference numeral 16 denotes a keyboard which can be used to set a measurement start command, an adjustment pressure value, and the like by a user operation. A buzzer 15 informs the user that the device has sensed that the key in the keyboard 16 has been pressed, the measurement has been completed, and the like. In this example, the adjustment pressure register 11 a is provided in the CPU 11, but an adjustment pressure storage unit may be provided in the RAM 13.

  FIG. 3 is an external perspective view of the photoelectric volume pulse wave sphygmomanometer of the embodiment. In the figure, reference numeral 17 denotes a sphygmomanometer body, which includes a configuration excluding the cuff 1 and the pulse wave sensor 8 of FIG. Here, the rubber tube 2 includes a signal line (not shown) with the pulse wave sensor 8 and is connected to the cuff 1 and the pulse wave sensor 8 (not shown). The display panel 14 of the LCD uses a dot matrix type display panel, and therefore can display various information (for example, characters, figures, signal waveforms, etc.). Reference numeral 20 denotes a power switch, and the keyboard 16 has a measurement start switch (ST) and a numeric keypad for inputting a cuff pressure value and the like.

<How to attach to measurement site>
The measurement unit including the cuff is configured to appropriately compress an appropriate place for measuring blood pressure, for example, an appropriate place such as an upper arm, a wrist, and an ankle.

<Operation of the device>
Next, the operation of the photoelectric volume pulse wave sphygmomanometer according to this embodiment will be described below. FIG. 4 is a flowchart of a measurement processing procedure of the photoelectric volume pulse wave sphygmomanometer according to the first embodiment.
When the apparatus is turned on by the power switch 20, a self-initial diagnosis process (not shown) is first performed to initialize the apparatus. Thereafter, the process is started by pressing the measurement start switch ST.

  In step S101, the cuff pressure P is read, and in step S102, it is determined whether or not the residual pressure of the cuff 1 is within a specified value. If the residual pressure exceeds the specified value, “residual pressure error” is displayed on the LCD 14 in step S123. If the residual pressure is within the specified value, a cuff pressurization upper limit value (for example, a value larger than the maximum blood pressure value of 120 to 280 mmHg) is set using the keyboard 16 in step S103, and the light amount and gain are set to predetermined values in step S104. Set to value.

  When the setting of the pressurization value and the light quantity / gain is completed, the quick exhaust valve 4 and the fine exhaust valve 5 are closed in steps S105 and S106. In step S107, driving of the pressure pump 3 is started and pressurization (pressure increase) is started. This is the start of the measurement process during pressurization, and the cuff pressure starts increasing at a constant speed (for example, 2 to 3 mmHg / sec). During this time, data processing by each functional block is performed in step S108, and the minimum blood pressure (diastolic blood pressure) and the maximum blood pressure (systolic blood pressure) are measured. When the maximum blood pressure is measured (S109), the pressurizing pump 3 is stopped in step S112. In step S110, it is determined whether or not the cuff pressure is higher than the pressure value U set in S103. If P> U, it is still in the normal measurement range and measurement is continued. On the other hand, when P> U, the cuff pressure is already higher than the set value, so “measurement error” is displayed on the LCD 14 in step S111. If necessary, detailed information such as “signal abnormality during pressurization” is additionally displayed. In step S114, the light amount and gain are adjusted based on the signal level of the pulse wave signal obtained during pressurization.

  When the adjustment of the light quantity / gain is completed, the fine exhaust valve 5 is opened in step S115. This is the start of the measurement process during pressure reduction (pressure reduction), and the cuff pressure starts to decrease at a constant speed (for example, 2 to 3 mmHg / sec). During this time, data processing by each functional block is performed in step S116, and the systolic blood pressure and the diastolic blood pressure are measured. In step S117, it is determined whether or not a minimum blood pressure value is detected during decompression. If not detected, continue measurement. In step S118, it is determined whether or not the cuff pressure is lower than a predetermined value L (for example, 40 mmHg). If P <L, it is still in the normal measurement range, and the flow returns to step S116. On the other hand, when P <L, the cuff pressure is already lower than the normal measurement range, so “measurement error” is displayed on the LCD 14 in step S119. If necessary, display detailed information such as “signal anomaly during decompression”.

  When the measurement is completed in the determination in step S117, the measurement process is completed in the normal measurement range, and the maximum blood pressure value and the minimum blood pressure value measured on the LCD 14 are displayed in step S120, and the tone signal is displayed to the buzzer 15 in step S121. Send. Preferably, different tone signals are sent after normal termination and abnormal termination. In step S122, the remaining air of the cuff 1 is quickly exhausted and the next measurement start is awaited.

<Blood pressure calculation operation>
FIG. 6 shows a graph (schematic diagram) of the cuff pressure and the pulse wave signal in the time from the start of measurement during pressurization (step S108) to the end of measurement during depressurization (step S116). The blood pressure measurement is generally performed as follows for the graph of FIG. That is, in the measurement at the time of pressurization, the cuff pressure at the point (a) at which the change in the magnitude of the pulse wave signal has started is set as the minimum blood pressure, and the cuff pressure at the time point (b) when the pulse wave signal disappears is set as the maximum blood pressure. On the other hand, the blood pressure measurement at the time of decompression is opposite to the blood pressure measurement at the time of pressurization, and the cuff pressure at the present time (c) when the pulse wave signal is output is the maximum blood pressure, and the change in the magnitude of the pulse wave signal is eliminated (d). The cuff pressure is the minimum blood pressure.

<Detailed operation of device light quantity and gain adjustment>
FIG. 5 shows a detailed flowchart of the light amount and gain adjustment shown in step S114 of FIG. 4, and FIG. 7 shows a circuit example for realizing the light amount and gain adjustment.

  First, at the time of light quantity and gain adjustment, the time constants of the pulse wave filter amplifiers 91 and 92 are halved by turning on SW1 to SW2 in FIG. In this state, the carrier level is detected in step S52, and it is checked in step S53 whether the pulse wave carrier is within the standard value (20 to 40% of the full scale of A / D10). If it is equal to or smaller than the standard value, the process proceeds to step S54 to check whether or not the light amount is maximum. If not, the light amount controller 18 is controlled in step S56 to increase the light amount. If the amount of light is maximum, the gain is increased by controlling the feedback of the amplifier 90 in step S55. After the process of step S55 or S56, the process returns to step S52 to repeat the carrier wave check again.

On the other hand, if the carrier level is greater than or equal to the standard value in step S53, it is checked in step S57 whether or not the gain is minimum. If not, the gain is controlled by controlling the feedback of the amplifier 90 by the gain controller 19a in step S59. Lower. If it is the minimum, the light amount is decreased in step S58. When the process of step S58 or S59 ends, the process returns to step S52 and the carrier wave level is checked again.
If the carrier level is within the standard value in step S53, SW1 to SW2 are opened in step S60, the time constants of the pulse wave filter amplifiers 91 to 92 are restored, and the pulse wave gain is adjusted by the amplifier 93 in step S61. And return.

  In the present embodiment, an example in which reflected light from blood in a blood vessel is detected has been described, but transmitted light may be detected instead.

  As described above, the photoelectric volume pulse wave sphygmomanometer according to the present embodiment makes it possible to adjust the signal level so that the signal level of the pulse wave signal is within a predetermined standard range, and at the same time enables highly accurate measurement, By making it possible to shorten the blood pressure measurement time, it is possible to provide a photoelectric volumetric pulse wave sphygmomanometer that can reduce the physical burden on the user due to the cuff pressure.

(Second Embodiment)
As a second embodiment of the electronic sphygmomanometer according to the present invention, a photoelectric volume pulse sphygmomanometer will be described below as an example. In the present embodiment, the light amount and gain are adjusted based on the pulse wave signal obtained prior to the measurement of blood pressure during pressurization, and high-precision blood pressure measurement is provided only by the measurement during pressurization.
Note that the configuration of the apparatus, the mounting method on the measurement site, the blood pressure calculation operation, and the detailed operation of the apparatus light amount and gain adjustment are the same as those in the first embodiment, and thus description thereof is omitted.

<Operation of the device>
Next, the operation of the photoelectric volume pulse wave sphygmomanometer according to this embodiment will be described below. FIG. 8 is a flowchart of the measurement processing procedure of the photoelectric volume pulse wave sphygmomanometer of the second embodiment.
When the apparatus is turned on by the power switch 20, a self-initial diagnosis process (not shown) is first performed to initialize the apparatus. Thereafter, the process is started by pressing the measurement start switch ST.

  In step S201, the cuff pressure P is read, and in step S202, it is determined whether or not the residual pressure of the cuff 1 is within a specified value. If the residual pressure exceeds the specified value, “residual pressure error” is displayed on the LCD 14 in step S222. If the residual pressure is within the specified value, a cuff pressure value (for example, a value larger than the maximum blood pressure value of 120 to 210 mmHg) is set using the keyboard 16 in step S203, and the light amount and gain are set to predetermined values in step S204. Set to.

  When the setting of the pressurization value and the light quantity / gain is completed, the quick exhaust valve 4 and the fine exhaust valve 5 are closed in steps S205 and S206. In step S207, driving of the pressure pump 3 is started and pressurization (pressure increase) is started.

  In step S208, it is determined whether or not the cuff pressure is higher than the pressure value C set in S203. If P> C, pressurization is continued. On the other hand, when P> C, the pressurizing pump 3 is stopped in step S209. In step S210, the sensor 8 is used to acquire a pulse wave signal, and in step S211, the light quantity and gain value are reset to obtain a predetermined signal level. In step S212, driving of the pressure pump 3 is started and pressurization is started again. This is the start of the measurement process during pressurization, and the cuff pressure starts increasing at a constant speed (for example, 2 to 3 mmHg / sec). During this time, data processing by each functional block is performed in step S213, and the minimum blood pressure and the maximum blood pressure are measured. When the maximum blood pressure is measured (S214), the pressurizing pump 3 is stopped in step S217, and the remaining air in the cuff 1 is rapidly exhausted in step S218.

  In step S215, it is determined whether or not the cuff pressure is higher than the pressurization value U set in S203. If P> U, it is still in the normal measurement range and measurement is continued. On the other hand, when P> U, the cuff pressure is already higher than the set value, so “measurement error” is displayed on the LCD 14 in step S216. If necessary, detailed information such as “signal abnormality during pressurization” is additionally displayed.

  When the measurement is completed in step S214, the measurement process is completed in the normal measurement range. In step S219, the highest blood pressure value and the lowest blood pressure value measured are displayed on the LCD 14, and a tone signal is sent to the buzzer 15 in step S220. . Preferably, different tone signals are sent after normal termination and abnormal termination.

As described above, the photoelectric volume pulse wave sphygmomanometer of the present embodiment allows the signal level to be adjusted so that the signal level of the pulse wave signal is within a predetermined standard range in order to enable appropriate blood pressure measurement. This has the effect of reducing the probability of blood pressure remeasurement during decompression. By making it possible to further shorten the blood pressure measurement time, it is possible to provide a photoelectric volume pulse wave sphygmomanometer that can reduce the physical burden on the user due to the cuff pressure. (Third embodiment)
As a third embodiment of the electronic sphygmomanometer according to the present invention, a photoelectric volume pulse sphygmomanometer will be described below as an example. As described above, in the first and second embodiments, the irradiation unit (LED 8a) that irradiates light to the blood flow of the blood vessel at one measurement site among the appropriate locations for measuring blood pressure using the cuff. And a light receiving portion (phototransistor 8b) for detecting reflected light from the bloodstream.

  On the other hand, in the third embodiment, cuffs are attached to, for example, the upper arm part and the ankle, respectively, at appropriate positions for measuring blood pressure, and light irradiation parts (see FIG. 9: LEDs 8a and 21a) and reflected light are applied to both of them. It has a light receiving section (see FIG. 9: phototransistors 8b and 21b) to detect, and can simultaneously measure blood pressure at a plurality of sites.

As shown in FIG. 9, the blood pressure measurement device according to the third embodiment has a pulse wave sensor 21 in the other cuff 20 in addition to the device configuration of the first embodiment (see FIG. 1). Yes. The cuff 20 includes an LED 21a that irradiates light to the pulsating blood vessel blood flow, and a phototransistor 21b that detects reflected light from the blood vessel blood flow. A sensor using a different measurement principle (such as a method using a pressure pulse wave) may be used for blood pressure measurement.
Since other configurations and operations are the same as those in the first and second embodiments, description thereof will be omitted.

  The photoelectric volume pulse wave sphygmomanometer of the present embodiment makes it possible to set the signal level of the pulse wave signal to be within a predetermined standard range at a plurality of measurement sites, thereby enabling highly accurate blood pressure measurement. Become. At the same time, it is possible to provide a photoelectric volume pulse wave sphygmomanometer that makes it possible to reduce the physical burden on the user due to the cuff pressure by enabling the blood pressure measurement time to be shortened.

(Other embodiments)
Although the embodiments of the present invention have been described in detail above, the present invention may be applied to a system constituted by a plurality of devices or may be applied to an apparatus constituted by one device.

  The present invention can also be achieved by supplying a program that realizes the functions of the above-described embodiments directly or remotely to a system or apparatus, and the system or apparatus reads and executes the supplied program code. The Accordingly, the program code itself installed in the computer in order to realize the functional processing of the present invention by the computer is also included in the technical scope of the present invention. In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS.

  As a recording medium for supplying the program, for example, floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card ROM, DVD (DVD-ROM, DVD-R) and the like.

  As another program supply method, a client computer browser is used to connect to an Internet homepage, and the computer program itself of the present invention or a compressed file including an automatic installation function is downloaded from the homepage to a recording medium such as a hard disk. Can also be supplied. It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the claims of the present invention.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. It is also possible to execute the encrypted program by using the key information and install the program on a computer.

  In addition to the functions of the above-described embodiments being realized by the computer executing the read program, the OS running on the computer based on the instruction of the program is a part of the actual processing. Alternatively, the functions of the above-described embodiment can be realized by performing all of them and performing the processing.

  Furthermore, after the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion board or The CPU or the like provided in the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

It is a block diagram of the photoelectric volume pulse wave sphygmomanometer of 1st Embodiment. It is explanatory drawing which showed the sensor operation | movement in the cuff of the photoelectric volume pulse wave sphygmomanometer of 1st Embodiment. It is an external appearance perspective view of the photoelectric volume pulse wave sphygmomanometer of 1st Embodiment. It is explanatory drawing which showed the flowchart of the blood-pressure measurement operation | movement of the photoelectric volume pulse wave sphygmomanometer of 1st Embodiment. It is explanatory drawing which showed the flowchart of the signal level adjustment operation | movement of the photoelectric volume pulse wave sphygmomanometer of 1st Embodiment. It is a graph (schematic diagram) of a cuff pressure and a pulse wave signal during measurement with the photoelectric volume pulse wave sphygmomanometer of the first embodiment. It is a circuit diagram of the photoelectric volume pulse wave sphygmomanometer of the first embodiment. It is explanatory drawing which showed the flowchart of the blood-pressure measurement operation | movement of the photoelectric volume pulse wave sphygmomanometer of 2nd Embodiment. It is a block diagram of the photoelectric volume pulse wave sphygmomanometer of 3rd Embodiment.

Claims (19)

A cuff that is worn in place to measure blood pressure and compresses it,
Detection means for detecting a pulse wave signal due to blood in the blood vessel;
Level adjusting means for adjusting the signal level of the pulse wave signal;
When the blood pressure is measured from the pulse wave signal detected by the detection unit when the cuff is pressurized, and the signal level of the pulse wave signal is outside a predetermined range, the signal level is set to a predetermined level by the level adjustment unit. Blood pressure measurement control means for adjusting the pressure to be within a range and measuring blood pressure when the cuff is decompressed;
A blood pressure measurement apparatus comprising: The blood pressure measurement control means further ends blood pressure measurement immediately when the signal level of the pulse wave signal detected by the level detection means is within a predetermined range. Blood pressure measurement device. A cuff that is worn in place to measure blood pressure and compresses it,
Detection means for detecting a pulse wave signal due to blood in the blood vessel;
Level adjusting means for adjusting the signal level of the pulse wave signal;
If the signal level of the pulse wave signal detected by the detection means before or during pressurization of the cuff is outside the predetermined range, the signal level is set within the predetermined range by the level adjusting means. Blood pressure measurement control means for adjusting and subsequently pressurizing the cuff to measure blood pressure;
A blood pressure measurement apparatus comprising: The blood pressure measurement device according to any one of claims 1 to 3, wherein blood pressure is measured at a plurality of different locations. The pulse wave signal detected by the detection means is
The blood pressure measurement device according to any one of claims 1 to 4, wherein the blood pressure measurement device is a photoelectric pulse wave signal obtained by absorption and reflection of light by blood in a blood vessel. The level adjusting means includes
A light amount adjusting means for adjusting an output light amount from the light emitting element;
Gain setting means for adjusting the signal level from the light receiving element,
When the signal level of the pulse wave signal detected by the level detection means is outside a predetermined range, adjustment is made so that the signal level falls within a predetermined range by at least one of the light amount setting means and the gain setting means. The blood pressure measurement device according to claim 5. A detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached in place for measuring blood pressure;
A level adjustment step of adjusting the signal level of the pulse wave signal;
When the blood pressure is measured from the pulse wave signal detected by the detection step when the cuff is pressurized, and the signal level of the pulse wave signal is out of a predetermined range, the signal level is set to a predetermined level by the level adjustment step. A blood pressure measurement control step of adjusting the pressure to be within a range and measuring the blood pressure when the cuff is decompressed;
A blood pressure measurement method comprising: The blood pressure measurement control step further ends the blood pressure measurement immediately when the signal level of the pulse wave signal detected by the level detection means is within a predetermined range. Blood pressure measurement method. A detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached in place for measuring blood pressure;
A level adjustment step of adjusting the signal level of the pulse wave signal;
If the signal level of the pulse wave signal detected by the detection step before or during pressurization of the cuff is outside the predetermined range, the signal level is set within the predetermined range by the level adjustment step. A blood pressure measurement control step of performing adjustment and subsequently pressurizing the cuff to measure blood pressure;
A blood pressure measurement method comprising: The blood pressure measurement method according to any one of claims 7 to 9, wherein blood pressure is measured at two or more different locations. The pulse wave signal detected by the detection step is
The blood pressure measurement method according to any one of claims 7 to 10, wherein the blood pressure measurement signal is a photoelectric pulse wave signal obtained by absorption and reflection of light by blood in a blood vessel. The level adjustment step includes
A light amount adjustment step for adjusting the output light amount from the light emitting element;
And a gain setting step for adjusting the signal level from the light receiving element,
When the signal level of the pulse wave signal detected by the detection step is outside a predetermined range, adjustment is performed so that the signal level falls within a predetermined range by at least one of the light amount setting step and the gain setting step. The blood pressure measurement method according to claim 11. A control program for executing a blood pressure measurement method,
A program code for executing a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached in place for measuring blood pressure;
Program code for executing a level adjustment process for adjusting the signal level of the pulse wave signal;
If the blood pressure is measured from a pulse wave signal detected by a program code for executing the detection step when the cuff is pressurized, and the signal level of the pulse wave signal is outside a predetermined range, the level adjustment step A program code for executing a blood pressure measurement control step of adjusting the signal level to be within a predetermined range by a program code for performing
A control program comprising: 14. The control according to claim 13, wherein the blood pressure measurement control step further ends the blood pressure measurement when the signal level of the pulse wave signal detected by the level detection means is within a predetermined range. program. A control program for executing a blood pressure measurement method,
A program code for executing a detection step of detecting a pulse wave signal due to blood in a blood vessel compressed by a cuff attached in place for measuring blood pressure;
Program code for executing a level adjustment process for adjusting the signal level of the pulse wave signal;
If the signal level of the pulse wave signal detected by the program code for executing the detection step before or during pressurization of the cuff is outside a predetermined range, the level adjustment step is executed. A program code for performing a blood pressure measurement control step of adjusting the signal level by a program code so as to be within a predetermined range and subsequently pressurizing the cuff to measure blood pressure;
A control program comprising: The control program according to any one of claims 13 to 15, wherein blood pressure is measured at two or more different locations. The control according to any one of claims 13 to 16, wherein the pulse wave signal detected in the detection step is a photoelectric pulse wave signal obtained by absorption and reflection of light by blood in a blood vessel. program. The level adjustment step includes a light amount adjustment step of adjusting an output light amount from the light emitting element, and a gain setting step of adjusting a signal level from the light receiving element,
When the signal level of the pulse wave signal detected in the detection step is out of a predetermined range, adjustment is performed so that the signal level falls within a predetermined range by at least one of the light amount setting step and the gain setting step. The control program according to claim 17. A computer-readable storage medium storing the control program according to any one of claims 13 to 18.

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