Sphygmomanometer and sphygmomanometer control method

Abstract

A sphygmomanometer (100) according to the present invention is provided with: a blood pressure measurement unit (210) for measuring the blood pressure of a user on the basis of a pulse wave signal during a pressurization process for pressurizing a cuff pressure indicating the internal pressure of a cuff worn on a site to be measured of the user; and a pulse wave number measurement unit (215) that measures the pulse wave number of the user on the basis of the pulse wave signal during the pressurization process. The blood pressure measurement unit (210) determines whether or not to continue the pressurization process on the basis of the pulse wave number. The sphygmomanometer (100) is further provided with a monitoring unit (220) that monitors the arrhythmia of the user on the basis of the pulse wave signal during the pressurization process.

Description

Technical Field

[0001] The present disclosure relates to a sphygmomanometer and a control method of the sphygmomanometer. Background Art

[0002] Conventionally, as disclosed in Patent Document 1 (Chinese Patent No. 107205670), when atrial fibrillation, a type of arrhythmia, is detected during blood pressure measurement, a technique is known in which a cuff is repeatedly inflated and atrial fibrillation determination process is repeatedly performed to improve determination accuracy.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Chinese Patent No. 107205670 Summary of the invention

[0006] Problems to be solved by the invention

[0007] According to Patent Document 1, in order to improve the determination accuracy, it is necessary to repeatedly perform the determination process of atrial fibrillation, which takes a long time for measurement and causes the user to feel the tightness of being pressed by the cuff many times, which is a cumbersome task for the user.

[0008] In one aspect, an object of the present disclosure is to provide a sphygmomanometer and a method for controlling the sphygmomanometer that can easily and accurately determine the presence or absence of arrhythmia when measuring blood pressure.

[0009] Technical Solution

[0010] In one example of the present disclosure, a sphygmomanometer includes: a blood pressure measuring unit that measures the blood pressure of a user based on a pulse wave signal during a pressurization process, wherein the pressurization process pressurizes a cuff pressure representing an internal pressure of a cuff worn on a measured part of the user; and a pulse wave number measuring unit that measures the pulse wave number of the user based on the pulse wave signal during the pressurization process. The blood pressure measuring unit determines whether the pressurization process is continued based on the pulse wave number. The sphygmomanometer also includes a monitoring unit that monitors arrhythmia of the user based on the pulse wave signal during the pressurization process.

[0011] According to the above configuration, the presence or absence of arrhythmia can be determined simply and accurately when blood pressure is measured by the pressure measurement method.

[0012] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: when the pulse wave number is above a threshold value, the blood pressure is measured based on the pulse wave signal during the pressurization process, and the pressurization process is stopped after the measurement; when the pulse wave number is less than the threshold value, the pressurization process is continued.

[0013] According to the above configuration, a pulse wave number sufficient for determining the presence or absence of arrhythmia with high accuracy can be obtained in the pressurized measurement method.

[0014] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: the systolic blood pressure is measured based on the pulse wave signal during the pressurization process, and when the pulse wave number is above a threshold value at a first timing when the cuff pressure is pressurized to a specified pressure above the systolic blood pressure, the pressurization process is stopped; when the pulse wave number is less than the threshold value at the first timing, the pressurization process is continued.

[0015] According to the above configuration, a pulse wave number sufficient for determining the presence or absence of arrhythmia with high accuracy can be obtained in the pressurization measurement method.

[0016] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: if the pulse wave number becomes above a threshold at a second timing within the period before the cuff pressure reaches an upper pressure limit value greater than a specified pressure by continuing the pressurization process, the pressurization process is stopped at the second timing; if the pulse wave number does not reach above the threshold during this period, the pressurization process is stopped when the cuff pressure reaches the upper pressure limit value.

[0017] According to the above configuration, excessive pressurization of the cuff can be prevented in the pressurized measurement mode.

[0018] In another example of the present disclosure, a sphygmomanometer includes: a blood pressure measuring unit that measures the user's blood pressure based on a pulse wave signal during a decompression process after a pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of a cuff worn on a measured part of the user to a pressure greater than the estimated systolic blood pressure, and the decompression process decompresses the cuff pressure; and a pulse wave number measuring unit that measures the user's pulse wave number based on the pulse wave signal during the pressurization process. The blood pressure measuring unit determines whether the pressurization process is continued based on the pulse wave number. The sphygmomanometer also includes a monitoring unit that monitors the user's arrhythmia based on the pulse wave signal during the decompression process.

[0019] According to the above configuration, the presence or absence of arrhythmia can be determined simply and accurately when blood pressure is measured by the reduced pressure measurement method.

[0020] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: when the pulse wave number is greater than a threshold value, the pressurization process is stopped when the cuff pressure reaches a specified pressure greater than the estimated systolic blood pressure; when the pulse wave number is less than the threshold value, the pressurization process is continued.

[0021] According to the above configuration, a pulse wave number sufficient for determining the presence or absence of arrhythmia with high accuracy can be obtained in the reduced pressure measurement mode.

[0022] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: when the pulse wave number is greater than a threshold value at the first timing when the cuff pressure is increased to a specified pressure greater than the estimated systolic blood pressure, the pressurization process is stopped; when the pulse wave number is less than the threshold value at the first timing, the pressurization process is continued.

[0023] According to the above configuration, a pulse wave number sufficient for determining the presence or absence of arrhythmia with high accuracy can be obtained in the reduced pressure measurement mode.

[0024] In another example of the present disclosure, the blood pressure measurement unit performs the following processing: if the pulse wave number becomes above a threshold at a second timing within the period before the cuff pressure reaches an upper pressure limit value greater than a specified pressure by continuing the pressurization process, the pressurization process is stopped at the second timing; if the pulse wave number does not reach above the threshold during this period, the pressurization process is stopped when the cuff pressure reaches the upper pressure limit value.

[0025] According to the above configuration, excessive pressurization of the cuff can be prevented in the decompression measurement mode.

[0026] In another example of the present disclosure, a control method of a blood pressure monitor includes the following steps: measuring the user's blood pressure based on a pulse wave signal during a pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of a cuff worn on a measured part of the user; measuring the user's pulse wave number based on the pulse wave signal during the pressurization process; determining whether the pressurization process is to be continued based on the pulse wave number; and monitoring the user's arrhythmia based on the pulse wave signal during the pressurization process.

[0027] According to the above configuration, the presence or absence of arrhythmia can be determined simply and accurately when blood pressure is measured by the pressure measurement method.

[0028] In another example of the present disclosure, a control method of a sphygmomanometer includes the following steps: measuring the user's blood pressure based on a pulse wave signal during a decompression process after a pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of a cuff worn on a measured part of the user to a pressure greater than an estimated systolic blood pressure, and the decompression process decompresses the cuff pressure; measuring the user's pulse wave number based on the pulse wave signal during the pressurization process; determining whether to continue the pressurization process based on the pulse wave number; and monitoring the user's arrhythmia based on the pulse wave signal during the decompression process.

[0029] According to the above configuration, the presence or absence of arrhythmia can be determined simply and accurately when blood pressure is measured by the reduced pressure measurement method.

[0030] Effects of the Invention

[0031] According to the present disclosure, the presence or absence of arrhythmia can be determined simply and accurately when measuring blood pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a diagram showing a blood pressure monitor 100 according to this embodiment.

[0033] Figure 2 This is a block diagram showing an example of the hardware configuration of a sphygmomanometer.

[0034] Figure 3 This is a block diagram showing the functional configuration of a sphygmomanometer.

[0035] Figure 4 This is a flowchart showing an example of the processing procedure in the pressurization measurement mode of the sphygmomanometer.

[0036] Figure 5 This is a flowchart showing another example of the processing procedure in the pressurization measurement mode of the sphygmomanometer.

[0037] Figure 6 This is a flowchart showing an example of a processing procedure in the pressure reduction measurement mode of the sphygmomanometer.

[0038] Figure 7 This is a flowchart showing another example of the processing procedure in the pressure reduction measurement mode of the sphygmomanometer. DETAILED DESCRIPTION

[0039] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same components. Their names and functions are also the same. Therefore, they will not be described in detail again.

[0040] [Application examples]

[0041] Reference Figure 1 , an application example of the present invention is described. Figure 1 It is a diagram showing a blood pressure monitor 100 according to this embodiment.

[0042] Reference Figure 1 The sphygmomanometer 100 is an upper arm sphygmomanometer for measuring the blood pressure of a user. The sphygmomanometer 100 has a main body and a cuff (armband) as main components. It should be noted that the sphygmomanometer 100 may also be a wrist sphygmomanometer in which the main body and the cuff (armband) are integrated. Figure 1 Describe the processing content.

[0043] exist Figure 1 In the embodiment, it is assumed that a user measures his / her own blood pressure using the sphygmomanometer 100. The sphygmomanometer 100 measures the user's blood pressure by a pressurization measurement method in which the blood pressure is measured during the pressurization of the cuff pressure, wherein the cuff pressure indicates the internal pressure of the cuff attached to the user's measured part (e.g., arm).

[0044] The sphygmomanometer 100 starts to pressurize the cuff (corresponding to Figure 1 (1)). The cuff pressure increase speed is assumed to be constant. During the cuff pressure increase process, the sphygmomanometer 100 measures (counts) the pulse wave number (corresponding to Figure 1 of (2)).

[0045] Next, the sphygmomanometer 100 determines whether to continue or stop the cuff pressure increase process based on the pulse wave number. Specifically, the sphygmomanometer 100 stops the cuff pressure increase process when the measured pulse wave number is above the threshold value, and continues the cuff pressure increase process (corresponding to the pulse wave number) when the pulse wave number is below the threshold value. Figure 1 of (3)).

[0046] This is a process for obtaining a pulse wave number sufficient for detecting arrhythmia (e.g., atrial fibrillation) with high accuracy when measuring blood pressure. Typically, the sphygmomanometer 100 determines whether arrhythmia occurs based on the interval of the pulse wave signal (pulse wave interval) obtained when measuring blood pressure. Therefore, in order to perform this determination with high accuracy, a sufficient number of pulse wave intervals are required. Therefore, the sphygmomanometer 100 performs a process of continuously pressurizing the cuff until the counted pulse wave number reaches or exceeds a threshold value.

[0047] Then, the sphygmomanometer 100 calculates the blood pressure value of the user and determines whether arrhythmia (corresponding to Figure 1 In this case, the sphygmomanometer 100 displays the user's blood pressure value and the result of the arrhythmia determination on the display.

[0048] According to the above application example, in the process of measuring blood pressure, the pulse wave number sufficient for detecting the occurrence of arrhythmia with high accuracy is obtained. Therefore, the user's blood pressure can be measured and arrhythmia can be determined with high accuracy during one blood pressure measurement. In addition, the user will not feel the complexity of the measurement.

[0049] It should be noted that, when a decompression measurement method is used as a blood pressure measurement method in which the blood pressure is measured during a decompression process after a pressurization process of the cuff pressure, the cuff is continuously pressurized until the pulse wave number reaches a threshold value during the pressurization process. Therefore, the cuff pressure at the beginning of the decompression process is set higher than usual. As a result, if the decompression speed of the cuff is fixed, the pulse wave number obtained during the decompression process increases, and as a result, a sufficient number of pulse wave intervals are obtained. Therefore, even when a decompression measurement method is used, the user's blood pressure can be measured and a high-precision arrhythmia judgment can be made during a single blood pressure measurement.

[0050] As described above, according to the sphygmomanometer 100 of this embodiment, the presence or absence of arrhythmia can be determined simply and accurately when measuring blood pressure.

[0051] [Configuration example]

[0052] (Hardware composition)

[0053] Figure 2 1 is a block diagram showing an example of the hardware configuration of the sphygmomanometer 100. Figure 2 The sphygmomanometer 100 includes a main body 10 and a cuff 20 as main components. The cuff 20 contains a fluid bag 22. The main body 10 includes a processor 110, an air system component 30 for blood pressure measurement, an A / D conversion circuit 310, a pump drive circuit 320, a valve drive circuit 330, a display 50, a memory 51, an operation unit 52, a communication interface 53, and a power supply unit 54.

[0054] The processor 110 is a calculation processing unit such as a CPU (Central Processing Unit) or an MPU (MultiProcessing Unit). The processor 110 implements each process (step) of the sphygmomanometer 100 described later by reading and executing a program stored in the memory 51. For example, the processor 110 controls the driving pump 32 and the valve 33 according to an operation signal from the operation unit 52. In addition, the processor 110 calculates the blood pressure value using an algorithm for calculating the blood pressure based on the oscillometric method, and displays it on the display 50.

[0055] The memory 51 is implemented by a RAM (Random Access Memory), a ROM (Read-Only Memory), a flash memory, etc. The memory 51 stores a program for controlling the sphygmomanometer 100, data for controlling the sphygmomanometer 100, setting data for setting various functions of the sphygmomanometer 100, data of measurement results of blood pressure values, pulse wave numbers, pulse wave intervals, etc. In addition, the memory 51 is used as a working memory when executing a program, etc.

[0056] The air system assembly 30 supplies or discharges air to the fluid bag 22 contained in the cuff 20 through the air piping. The air system assembly 30 includes a pressure sensor 31 for detecting the pressure in the fluid bag 22, and a pump 32 and a valve 33 as an expansion and contraction mechanism for expanding and contracting the fluid bag 22.

[0057] The pressure sensor 31 detects the pressure (cuff pressure) in the fluid bag 22, and outputs a signal (cuff pressure signal) corresponding to the detected pressure to the A / D conversion circuit 310. The pressure sensor 31 is, for example, a piezoresistive pressure sensor, and is connected to the pump 32, the valve 33, and the fluid bag 22 contained in the cuff 20 via an air pipe. The pump 32 supplies air as a fluid to the fluid bag 22 via the air pipe to pressurize the cuff. The valve 33 opens and closes by discharging the air in the fluid bag 22 or sealing the air into the fluid bag 22 via the air pipe to control the cuff pressure.

[0058] The A / D conversion circuit 310 converts the output value of the pressure sensor 31 (for example, a voltage value corresponding to the change in resistance caused by the piezoresistive effect) from an analog signal into a digital signal and outputs it to the processor 110. The processor 110 obtains a signal indicating the cuff pressure based on the output value of the A / D conversion circuit 310. The pump drive circuit 320 controls the drive of the pump 32 based on the control signal given by the processor 110. The valve drive circuit 330 controls the opening and closing of the valve 33 based on the control signal given by the processor 110.

[0059] When measuring blood pressure by decompression measurement according to the general oscillometric method, the following actions are roughly performed. Specifically, the cuff is pre-wound around the measured part (wrist, arm, etc.) of the subject. During the measurement, the pump 32 and valve 33 are controlled to increase the cuff pressure to a level higher than the estimated systolic blood pressure, and then the pressure is slowly reduced. During the decompression process, the cuff pressure is detected by the pressure sensor, and the change in arterial volume generated in the artery of the measured part is extracted as a pulse wave signal. Based on the change in the amplitude of the pulse wave signal accompanied by the change in the cuff pressure at this time (mainly the rising edge and the falling edge), the highest blood pressure (systolic blood pressure) and the lowest blood pressure (diastolic blood pressure) are calculated.

[0060] The display 50 displays various information including blood pressure measurement results based on a control signal from the processor 110. The communication interface 53 exchanges various information with an external device. The power supply unit 54 supplies power to the processor 110 and various hardware.

[0061] The operation unit 52 inputs an operation signal corresponding to an instruction from the user to the processor 110. For example, the operation unit 52 includes a measurement switch 52A for accepting a blood pressure measurement instruction from the user.

[0062] (Functional composition)

[0063] Figure 3 is a block diagram showing the functional configuration of the sphygmomanometer 100. Figure 3The sphygmomanometer 100 includes a blood pressure measuring unit 210, a pulse wave number measuring unit 215, a monitoring unit 220, and an output control unit 230 as main functional components. These functions are realized by, for example, the processor 110 of the sphygmomanometer 100 executing a program stored in the memory 51. Some or all of these functions may also be realized by hardware.

[0064] The blood pressure measuring unit 210 controls the cuff pressure in accordance with a measurement start instruction from the user via the operation unit 52. Specifically, the blood pressure measuring unit 210 drives the pump 32 via the pump driving circuit 320 and drives the valve 33 via the valve driving circuit 330. The valve 33 opens and closes to discharge or seal the air in the fluid bag 22, thereby controlling the cuff pressure.

[0065] The blood pressure measuring unit 210 receives the cuff pressure signal detected by the pressure sensor 31, and extracts a pulse wave signal representing the pulse wave of the measured part superimposed on the cuff pressure signal. That is, the blood pressure measuring unit 210 detects the pulse wave as a pressure component superimposed on the cuff pressure signal in synchronization with the heart beat of the user from the cuff pressure signal.

[0066] The blood pressure measuring unit 210 calculates the blood pressure information of the user based on the cuff pressure signal and the pulse wave signal superimposed on the cuff pressure signal. The blood pressure measuring unit 210 measures the blood pressure of the user according to the oscillometric method. Specifically, the blood pressure measuring unit 210 performs a pressurization measurement mode or a decompression measurement mode when measuring the blood pressure, wherein the pressurization measurement mode measures the blood pressure of the user based on the pulse wave signal in the first pressurization process of pressurizing the cuff pressure, and the decompression measurement mode measures the blood pressure of the user based on the pulse wave signal in the decompression process of decompressing the cuff pressure after the second pressurization process of pressurizing the cuff pressure to a pressure greater than the estimated systolic blood pressure.

[0067] First, a description will be given of a case where the blood pressure measurement unit 210 executes the pressurization measurement mode which is a blood pressure measurement mode based on the pressurization measurement method.

[0068] When the pressurization measurement mode is executed, the pulse wave number measurement unit 215 measures the user's pulse wave number N1 based on the pulse wave signal in the first pressurization process. In this case, the blood pressure measurement unit 210 determines whether the first pressurization process is continuing based on the pulse wave number N1.

[0069] In one aspect, when the pulse wave number N1 is equal to or greater than the threshold value Th1, the blood pressure measurement unit 210 measures the blood pressure (systolic blood pressure and diastolic blood pressure) based on the pulse wave signal during the first pressurization process, and stops the first pressurization process after the measurement. On the other hand, when the pulse wave number N1 is less than the threshold value Th1, the blood pressure measurement unit 210 continues the first pressurization process. It should be noted that when the cuff pressure reaches the pressure upper limit value Pmax by continuously performing the first pressurization process, the blood pressure measurement unit 210 stops the first pressurization process at the timing of reaching. In this case, even if the pulse wave number N1 is less than the threshold value Th1, the blood pressure measurement unit 210 stops the first pressurization process. The threshold value Th1 is a value predetermined by the designer of the sphygmomanometer 100 or the like.

[0070] In another aspect, the blood pressure measurement unit 210 measures the blood pressure (systolic blood pressure and diastolic blood pressure) based on the pulse wave signal during the first pressurization process. When the pulse wave number N1 is equal to or greater than the threshold value Th1 at the timing T1 when the cuff pressure is pressurized to a pressure P1 above the systolic blood pressure, the blood pressure measurement unit 210 stops the first pressurization process. Typically, the pressure P1 is set to a value larger than the systolic blood pressure by a predetermined value (for example, 40 mmHg).

[0071] On the other hand, when the pulse wave number N1 is less than the threshold value Th1 at the timing T1, the blood pressure measurement unit 210 continues the first pressurization process. Then, when the pulse wave number N1 becomes equal to or greater than the threshold value Th1 at the timing T2 during the period before the cuff pressure reaches the pressure upper limit value Pmax (P1 < Pmax) by continuously performing the first pressurization process, the blood pressure measurement unit 210 stops the first pressurization process at the timing T2. On the other hand, when the pulse wave number N1 does not reach equal to or greater than the threshold value during this period, the blood pressure measurement unit 210 stops the first pressurization process at the timing when the cuff pressure reaches the pressure upper limit value Pmax.

[0072] The monitoring unit 220 monitors the arrhythmia (for example, atrial fibrillation) of the user based on the pulse wave signal during the first pressurization process (that is, determines whether arrhythmia has occurred). For the determination method of whether arrhythmia has occurred, a well-known method is used. For example, the monitoring unit 220 determines whether arrhythmia has occurred based on the generation intervals of a plurality of pulse waves obtained from the pulse wave signal.

[0073] The output control unit 230 displays the measurement result (for example, systolic blood pressure value and diastolic blood pressure value) of the blood pressure measurement unit 210 and the monitoring result (for example, determination result of whether arrhythmia has occurred) of the monitoring unit 220 on the display 50. It should be noted that the output control unit 230 can send the measurement result and the monitoring result to an external device via the communication interface 53, or can be configured to perform sound output via a speaker (not shown).

[0074] Next, a case where the blood pressure measurement unit 210 executes a decompression measurement mode, which is a blood pressure measurement mode based on the decompression measurement method, will be described.

[0075] When the pulse wave number measurement unit 215 executes the decompression measurement mode, it measures the user's pulse wave number N2 based on the pulse wave signal during the second pressurization process. In this case, the blood pressure measurement unit 210 determines whether to continue the second pressurization process based on the pulse wave number N2.

[0076] In one aspect, when the pulse wave number N2 is equal to or greater than the threshold Th2, the blood pressure measurement unit 210 stops the second pressurization process when the cuff pressure reaches a pressure P2 that is equal to or greater than the estimated systolic blood pressure. Typically, the pressure P2 is set to a value that is a specified value (e.g., 40 mmHg) greater than the estimated systolic blood pressure. On the other hand, when the pulse wave number N2 is less than the threshold Th2, the blood pressure measurement unit 210 continues the second pressurization process. It should be noted that when the cuff pressure reaches the pressure upper limit value Pmax by continuously performing the second pressurization process, the blood pressure measurement unit 210 stops the second pressurization process at the timing of reaching. The threshold Th2 is a value预先 determined by the designer of the sphygmomanometer or the like.

[0077] In another aspect, at the timing T3 when the cuff pressure is pressurized to a pressure P2 that is equal to or greater than the estimated systolic blood pressure, when the pulse wave number N2 is equal to or greater than the threshold Th2, the blood pressure measurement unit 210 stops the second pressurization process. On the other hand, when the pulse wave number N2 is less than the threshold Th2 at the timing T3, the blood pressure measurement unit 210 continues the second pressurization process. Next, at the timing T4 during the period before the cuff pressure reaches the pressure upper limit value Pmax (P3 < Pmax) by continuously performing the second pressurization process, when the pulse wave number N2 becomes equal to or greater than the threshold Th2, the blood pressure measurement unit 210 stops the second pressurization process at the timing T4. On the other hand, when the pulse wave number N2 does not reach equal to or greater than the threshold Th2 during this period, the blood pressure measurement unit 210 stops the second pressurization process at the timing when the cuff pressure reaches the pressure upper limit value Pmax.

[0078] The monitoring unit 220 monitors the user's arrhythmia based on the pulse wave signal during the decompression process. The output control unit 230 displays the measurement result of the blood pressure measurement unit 210 and the monitoring result of the monitoring unit 220 on the display 50.

[0079] (Processing step: pressurization measurement mode)

[0080] Figure 4 is a flowchart showing an example of the processing procedure in the pressurization measurement mode of the sphygmomanometer 100. It is assumed that at the start time of the processing, the user is in a state where the cuff 20 of the sphygmomanometer 100 is worn. This will be described later in Figure 5 to Figure 7The same is true in .

[0081] Reference Figure 4 , the processor 110 of the sphygmomanometer 100 receives a start instruction of blood pressure measurement from the user via the measurement switch 52A of the operation unit 52 (step S10). The processor 110 initializes the pressure sensor 31 (step S12). Specifically, the processor 110 initializes the processing storage area, and performs 0 mmHg adjustment (setting the atmospheric pressure to 0 mmHg) of the pressure sensor 31 in a state where the pump 32 is turned off (stopped) and the valve 33 is opened.

[0082] Next, the processor 110 closes the valve 33 via the valve drive circuit 330 (step S14), turns on (starts) the pump 32 via the pump drive circuit 320, and starts pressurizing the cuff 20 (fluid bag 22) (step S16). At this time, the processor 110 controls the pressurization speed of the cuff pressure, which is the pressure in the fluid bag 22, based on the output of the pressure sensor 31 while supplying air from the pump 32 to the fluid bag 22. Thus, the pressurization process in the pressurization measurement mode starts. It should be noted that the processor 110 controls the pressurization speed to be fixed.

[0083] Next, during the pressurization process, the processor 110 measures (counts) the pulse wave number N1 based on the pulse wave signal extracted from the cuff pressure signal detected by the pressure sensor 31 (step S18). The processor 110 determines whether the pulse wave number N1 is greater than the threshold value Th1 (step S20). When the pulse wave number N1 is less than the threshold value Th1 (No in step S20), the processor 110 returns to the process of step S16, and continues to pressurize the cuff 20 as long as the cuff pressure does not reach the upper pressure limit value Pmax (for example, 300 mmHg). When the pulse wave number N1 is greater than the threshold value Th1 (Yes in step S20), the processor 110 attempts to calculate the highest blood pressure (systolic blood pressure) and the lowest blood pressure (diastolic blood pressure), and determines whether the blood pressure calculation is completed (step S22).

[0084] When the blood pressure calculation cannot be completed due to insufficient data (No in step S22 ), the processor 110 repeats the processing of steps S16 to S22 and continues the pressurization process as long as the cuff pressure does not reach the predetermined pressure upper limit Pmax.

[0085] When the blood pressure calculation is completed (Yes in step S22), the processor 110 determines whether arrhythmia has occurred based on the pulse wave signal obtained during the pressurization process (step S24). It should be noted that the processing of step S24 can also be performed after the processing of step S26 or step S28 described later.

[0086] Next, the processor 110 stops the pump 32 (i.e., stops the pressurization process) (step S26), opens the valve 33 (step S28), and controls the air in the cuff 20 to be exhausted. The processor 110 displays the blood pressure value obtained in step S22 and the determination result obtained in step S24 on the display 50 (step S30).

[0087] Figure 5 FIG. 2 is a flowchart showing another example of the processing procedure of the sphygmomanometer 100 in the pressurization measurement mode. Figure 5 The processing of steps S10 to S16 is as follows Figure 4 As described in , the detailed description will not be repeated.

[0088] After step S16, the processor 110 attempts to calculate the highest blood pressure (systolic blood pressure) and the lowest blood pressure (diastolic blood pressure), and determines whether the blood pressure calculation is completed (step S40). If the blood pressure calculation is not completed (No in step S40), as long as the cuff pressure does not reach the upper pressure limit value Pmax, the processor 110 repeatedly performs the processing of steps S16 and S40 and continues the pressurization process.

[0089] When the blood pressure calculation is completed (Yes in step S40), the processor 110 determines whether the cuff pressure is greater than the pressure P1 of the measured systolic blood pressure (step S42). When the cuff pressure is less than the pressure P1 (No in step S42), the processor 110 returns to step S16 to continue pressurizing the cuff 20. When the cuff pressure is greater than the pressure P1 (Yes in step S42), the processor 110 measures (counts) the pulse wave number N1 based on the pulse wave signal during the pressurization process starting from step S16 (step S44).

[0090] The processor 110 determines whether the pulse wave number N1 is greater than the threshold value Th1 (step S46). If the pulse wave number N1 is less than the threshold value Th1 (No in step S46), the processor 110 returns to the process of step S16 and continues to pressurize the cuff 20 as long as the cuff pressure does not reach the upper pressure limit value Pmax. If the pulse wave number N1 is greater than the threshold value Th1 (Yes in step S46), the processor 110 executes the process of step S24. Each process of steps S24 to S30 is as described in Figure 4 As described in , the detailed description will not be repeated.

[0091] According to the above, in the pressurization measurement mode, the blood pressure can be measured during the pressurization process, and a pulse wave number sufficient for determining whether or not arrhythmia has occurred can be obtained, thereby improving the accuracy of the determination.

[0092] (Processing steps: Decompression measurement mode)

[0093] Figure 6 1 is a flowchart showing an example of a processing procedure of the sphygmomanometer 100 in the reduced pressure measurement mode.

[0094] Reference Figure 6 The processing of steps S50 to S56 is respectively Figure 4 The processing of steps S10 to S16 is the same, so the detailed description thereof will not be given. It should be noted that the pressurization process in the decompression measurement mode is started by the processing of step S56. At this time, the sphygmomanometer 100 controls the pressurization speed to be constant.

[0095] The processor 110 measures the pulse wave number N2 based on the pulse wave signal obtained during the pressurization process in the decompression measurement mode (step S58). The processor 110 determines whether the pulse wave number N2 is greater than the threshold value Th2 (step S60). When the pulse wave number N2 is less than the threshold value Th2 (no in step S60), the processor 110 returns to the process of step S56, and continues to pressurize the cuff 20 as long as the cuff pressure does not reach the upper pressure limit value Pmax. When the pulse wave number N2 is greater than the threshold value Th2 (yes in step S60), the processor 110 estimates the systolic blood pressure based on the pulse wave signal obtained during the pressurization process (step S62). The estimation of the systolic blood pressure is performed by a well-known method. The processor 110 determines whether the cuff pressure is greater than the pressure P2 (step S64).

[0096] When the cuff pressure is less than the pressure P2 (No in step S64), the processor 110 returns to step S56 to continue pressurizing the cuff 20. When the cuff pressure is greater than the pressure P2 (Yes in step S64), the processor 110 controls the pump 32 to stop (i.e., stop the pressurization process) (step S66) and gradually open the valve 33 (step S68). Thus, the pressurization process is changed to the decompression process, and the cuff pressure is gradually decompressed. At this time, the processor 110 controls the decompression speed to be fixed.

[0097] During the decompression process, the processor 110 extracts the pulse wave signal from the cuff pressure signal detected by the pressure sensor 31, attempts to calculate the systolic blood pressure and the diastolic blood pressure based on the pulse wave signal, and determines whether the blood pressure calculation is completed (step S70). If the blood pressure calculation is not completed (no in step S70), the processor 110 repeatedly performs the processing of steps S68 and S70. If the blood pressure calculation is completed (yes in step S70), the processor 110 determines whether arrhythmia has occurred based on the pulse wave signal obtained during the decompression process (step S72). It should be noted that the processing of step S72 can also be performed after the processing of step S74 described later.

[0098] The processor 110 controls the valve 33 to fully open (step S74) to rapidly discharge the air in the cuff 20. The processor 110 displays the blood pressure value obtained in step S70 and the determination result obtained in step S72 on the display 50 (step S76).

[0099] Figure 7 2 is a flowchart showing another example of the processing procedure of the sphygmomanometer 100 in the pressure increase / decrease measurement mode.

[0100] Reference Figure 7 The processing of steps S50 to S56 is respectively Figure 4 The processing of steps S10 to S16 is the same, so the detailed description thereof will not be given. The pressurization process in the decompression measurement mode is started by the processing of step S56.

[0101] The processor 110 estimates the systolic blood pressure based on the pulse wave signal obtained during the pressurization process in the decompression measurement mode (step S80 ). The processor 110 determines whether the cuff pressure is equal to or greater than the pressure P2 (step S82 ).

[0102] When the cuff pressure is less than the pressure P2 (No in step S82), the processor 110 returns to step S56 to continue pressurizing the cuff 20. When the cuff pressure is greater than the pressure P2 (Yes in step S82), the processor 110 measures the pulse wave number N2 based on the pulse wave signal obtained during the pressurization process (step S84). The processor 110 determines whether the pulse wave number N2 is greater than the threshold value Th2 (step S86).

[0103] If the pulse wave number N2 is less than the threshold value Th2 (No in step S86), the processor 110 returns to the process of step S56 and continues to pressurize the cuff 20 as long as the cuff pressure does not reach the upper pressure limit value Pmax. If the pulse wave number N2 is greater than the threshold value Th2 (Yes in step S86), the processor 110 executes the process of step S66. The processes of steps S66 to S76 are as described in Figure 6 As described in , the detailed description will not be repeated.

[0104] According to the above, in the decompression measurement mode, the blood pressure can be measured during the decompression process, and a pulse wave number sufficient for determining whether or not arrhythmia has occurred can be obtained, thereby improving the accuracy of the determination.

[0105] <Other Implementation Methods>

[0106] (1) In the above-mentioned embodiment, a program for causing a computer to function to execute the control described in the above-mentioned flowchart can also be provided. Such a program can be recorded on a non-temporary computer-readable recording medium such as a floppy disk, a CD-ROM (Compact Disc Read Only Memory), a secondary storage device, a main storage device, and a memory card attached to the computer, and provided as a program product. Alternatively, the program can be provided by recording on a recording medium such as a hard disk built into the computer. In addition, the program can also be provided by downloading via a network.

[0107] (2) The configurations described as examples in the above-mentioned embodiments are examples of the configurations of the present invention, and can be combined with other known technologies, and can be modified by omitting a portion of the configurations without departing from the gist of the present invention. In addition, in the above-mentioned embodiments, the processes and configurations described in other embodiments can be appropriately adopted for implementation.

[0108] [Note]

[0109] As described above, the present embodiment includes the following disclosures.

[0110] [Composition 1]

[0111] A sphygmomanometer (100) comprises: a blood pressure measuring unit (210) for measuring a user's blood pressure based on a pulse wave signal during a pressurization process, wherein the pressurization process pressurizes a cuff pressure representing an internal pressure of a cuff worn on a measured part of the user; and a pulse wave number measuring unit (215) for measuring the user's pulse wave number based on the pulse wave signal during the pressurization process, wherein the blood pressure measuring unit (210) determines whether the pressurization process is to be continued based on the pulse wave number, and the sphygmomanometer further comprises a monitoring unit (220) for monitoring arrhythmia of the user based on the pulse wave signal during the pressurization process.

[0112] [Composition 2]

[0113] According to the sphygmomanometer (100) described in configuration 1, the blood pressure measuring unit (210) performs the following processing: when the pulse wave number is greater than a threshold value, the blood pressure is measured based on the pulse wave signal during the pressurization process, and the pressurization process is stopped after the measurement; when the pulse wave number is less than the threshold value, the pressurization process is continued.

[0114] [Composition 3]

[0115] According to the sphygmomanometer (100) described in configuration 1, the blood pressure measuring unit (210) performs the following processing: the systolic blood pressure is measured based on the pulse wave signal during the pressurization process, and when the pulse wave number is above a threshold value at a first timing when the cuff pressure is pressurized to a specified pressure above the systolic blood pressure, the pressurization process is stopped, and when the pulse wave number is less than the threshold value at the first timing, the pressurization process is continued.

[0116] [Composition 4]

[0117] According to the sphygmomanometer (100) described in configuration 3, the blood pressure measuring unit (210) performs the following processing: if the pulse wave number becomes above the threshold at a second timing within the period before the cuff pressure reaches an upper pressure limit value greater than the specified pressure by continuing the pressurization process, the pressurization process is stopped at the second timing; if the pulse wave number does not reach above the threshold during the period, the pressurization process is stopped at the timing when the cuff pressure reaches the upper pressure limit value.

[0118] [Composition 5]

[0119] A sphygmomanometer (100) comprising: a blood pressure measuring unit (210) for measuring a user's blood pressure based on a pulse wave signal during a decompression process after a pressurization process, wherein the pressurization process pressurizes a cuff pressure representing an internal pressure of a cuff worn on a measured part of the user to a pressure greater than an estimated systolic blood pressure, and the decompression process decompresses the cuff pressure; and a pulse wave number measuring unit (215) for measuring the user's pulse wave number based on the pulse wave signal during the pressurization process, wherein the blood pressure measuring unit (210) determines whether the pressurization process is to be continued based on the pulse wave number, and the sphygmomanometer (100) further comprises a monitoring unit (220) for monitoring arrhythmia of the user based on the pulse wave signal during the decompression process.

[0120] [Composition 6]

[0121] According to the sphygmomanometer (100) described in configuration 5, the blood pressure measuring unit (210) performs the following processing: when the pulse wave number is above a threshold value, the pressurization process is stopped when the cuff pressure reaches a specified pressure above the estimated systolic blood pressure, and when the pulse wave number is less than the threshold value, the pressurization process is continued.

[0122] [Composition 7]

[0123] According to the sphygmomanometer (100) described in configuration 5, the blood pressure measuring unit (210) performs the following processing: when the cuff pressure is pressurized to a specified pressure above the estimated systolic blood pressure at a first timing and the pulse wave number is above a threshold value, the pressurization process is stopped; and when the pulse wave number is less than the threshold value at the first timing, the pressurization process is continued.

[0124] [Composition 8]

[0125] According to the sphygmomanometer (100) described in configuration 6, the blood pressure measuring unit (210) performs the following processing: if the pulse wave number becomes above the threshold at a second timing within the period before the cuff pressure reaches an upper pressure limit value greater than the specified pressure by continuing the pressurization process, the pressurization process is stopped at the second timing; if the pulse wave number does not reach above the threshold during the period, the pressurization process is stopped at the timing when the cuff pressure reaches the upper pressure limit value.

[0126] [Composition 9]

[0127] A control method for a sphygmomanometer (100), the control method comprising the following steps: measuring a user's blood pressure based on a pulse wave signal during a pressurization process, wherein the pressurization process pressurizes a cuff pressure representing an internal pressure of a cuff worn on a measured part of the user; measuring the pulse wave number of the user based on the pulse wave signal during the pressurization process; judging whether the pressurization process is to be continued based on the pulse wave number; and monitoring arrhythmia of the user based on the pulse wave signal during the pressurization process.

[0128] [Composition 10]

[0129] A control method for a sphygmomanometer (100), the control method comprising the following steps: measuring the blood pressure of a user based on a pulse wave signal during a decompression process after a pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of a cuff worn on a measured part of the user to a pressure greater than an estimated systolic blood pressure, and the decompression process decompresses the cuff pressure; measuring the pulse wave number of the user based on the pulse wave signal during the pressurization process; judging whether to continue the pressurization process based on the pulse wave number; and monitoring arrhythmia of the user based on the pulse wave signal during the decompression process.

[0130] The embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

[0131] Description of Reference Numerals

[0132] 10: Main body; 20: Cuff; 22: Fluid bag; 30: Air system component; 31: Pressure sensor; 32: Pump; 33: Valve; 50: Display; 51: Memory; 52: Operation unit; 52A: Measurement switch; 53: Communication interface; 54: Power supply unit; 100: Sphygmomanometer; 110: Processor; 210: Blood pressure measurement unit; 215: Pulse wave number measurement unit; 220: Monitoring unit; 230: Output control unit; 310: A / D conversion circuit; 320: Pump drive circuit; 330: Valve drive circuit.

Claims

1. A sphygmomanometer, comprising: The blood pressure measuring unit measures the user's blood pressure based on the pulse wave signal during the pressurization process, wherein: The pressurization process pressurizes the cuff pressure indicating the internal pressure of the cuff worn on the measured part of the user; and a pulse wave rate measuring unit for measuring the pulse wave rate of the user based on the pulse wave signal during the pressurization process; The blood pressure measuring unit determines whether the pressurization process is continuing based on the pulse wave number. The sphygmomanometer further includes a monitoring unit configured to monitor arrhythmia of the user based on a pulse wave signal during the pressurization.

2. The sphygmomanometer according to claim 1, wherein: The blood pressure measurement unit performs the following processing: When the pulse wave number is equal to or greater than a threshold value, blood pressure is measured based on the pulse wave signal during the pressurization process, and the pressurization process is stopped after the measurement. When the pulse wave number is smaller than the threshold value, the pressurization process is continued.

3. The sphygmomanometer according to claim 1, wherein: The blood pressure measurement unit performs the following processing: determining the systolic blood pressure based on the pulse wave signal during the pressurization process, When the pulse wave number is equal to or greater than a threshold value at a first timing when the cuff pressure is increased to a predetermined pressure equal to or greater than the systolic blood pressure, the pressurization process is stopped; When the pulse wave number is smaller than the threshold value at the first timing, the pressurization process is continued.

4. The sphygmomanometer according to claim 3, wherein: The blood pressure measurement unit performs the following processing: If the pulse wave number becomes equal to or greater than the threshold value at a second timing during a period before the cuff pressure reaches an upper pressure limit value greater than the predetermined pressure by continuing the pressurization process, stopping the pressurization process at the second timing, If the pulse wave number does not reach or exceed the threshold value during the period, the pressurization process is stopped at the timing when the cuff pressure reaches the upper pressure limit value.

5. A sphygmomanometer, comprising: The blood pressure measuring unit measures the user's blood pressure based on the pulse wave signal during the decompression process after the pressurization process, wherein: The pressurization process pressurizes the cuff pressure indicating the internal pressure of the cuff worn on the measured part of the user to a pressure greater than the estimated systolic blood pressure, and the depressurization process depressurizes the cuff pressure; and a pulse wave rate measuring unit for measuring the pulse wave rate of the user based on the pulse wave signal during the pressurization process; The blood pressure measuring unit determines whether the pressurization process is continuing based on the pulse wave number. The sphygmomanometer further includes a monitoring unit configured to monitor arrhythmia of the user based on a pulse wave signal during the decompression process.

6. The sphygmomanometer according to claim 5, wherein: The blood pressure measurement unit performs the following processing: When the pulse wave number is equal to or greater than a threshold value and the cuff pressure reaches a predetermined pressure equal to or greater than the estimated systolic blood pressure, the pressurization process is stopped; When the pulse wave number is smaller than the threshold value, the pressurization process is continued.

7. The sphygmomanometer according to claim 5, wherein: The blood pressure measurement unit performs the following processing: When the pulse wave number is equal to or greater than a threshold value at a first timing when the cuff pressure is increased to a predetermined pressure equal to or greater than the estimated systolic blood pressure, the pressurization process is stopped; When the pulse wave number is smaller than the threshold value at the first timing, the pressurization process is continued.

8. The sphygmomanometer according to claim 7, wherein: The blood pressure measurement unit performs the following processing: If the pulse wave number becomes equal to or greater than the threshold value at a second timing during a period before the cuff pressure reaches an upper pressure limit value greater than the predetermined pressure by continuing the pressurization process, stopping the pressurization process at the second timing, If the pulse wave number does not reach or exceed the threshold value during the period, the pressurization process is stopped at the timing when the cuff pressure reaches the upper pressure limit value.

9. A method for controlling a sphygmomanometer, the method comprising the following steps: measuring the user's blood pressure based on the pulse wave signal during the pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of the cuff worn on the measured part of the user; determining the pulse wave number of the user based on the pulse wave signal during the pressurization process; determining whether to continue the pressurization process based on the pulse wave number; and The user is monitored for arrhythmia based on the pulse wave signal during the compression process.

10. A method for controlling a sphygmomanometer, the method comprising the following steps: Measuring the blood pressure of the user based on the pulse wave signal in the decompression process after the pressurization process, wherein the pressurization process pressurizes the cuff pressure representing the internal pressure of the cuff worn on the measured part of the user to a pressure greater than the estimated systolic blood pressure, and the decompression process decompresses the cuff pressure; determining the pulse wave number of the user based on the pulse wave signal during the pressurization process; determining whether to continue the pressurization process based on the pulse wave number; and The user is monitored for arrhythmia based on the pulse wave signal during the decompression process.

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