Sphygmomanometer and blood pressure measurement method

Abstract

A sphygmomanometer (100) is provided with: a blood pressure measurement unit (210) for measuring the blood pressure of a user; a monitoring unit (220) that monitors arrhythmia of the user during the first blood pressure measurement by the blood pressure measurement unit (210); and an output control unit (230) that outputs the blood pressure value of the user measured by the blood pressure measurement unit (210). When the monitoring unit (220) determines that the arrhythmia has occurred, the blood pressure measurement unit (210) further measures the blood pressure of the user multiple times or more, and the output control unit (230) outputs, as the blood pressure value of the user, the blood pressure value measured during the first blood pressure measurement and the average value of the blood pressure values measured during the blood pressure measurement multiple times or more.

Description

Technical Field

[0001] The present disclosure relates to a sphygmomanometer and a blood pressure measuring method. Background Art

[0002] Conventionally, there is known a technique for detecting abnormal cardiac conditions such as atrial fibrillation using a pulse pressure waveform used for blood pressure measurement. For example, a cardiac abnormality detection device disclosed in Patent Document 1 (Japanese Patent Application Publication No. 2020-146140) collects a pulse pressure waveform from a sphygmomanometer, performs statistical analysis on amplitude waveform data of a spectrum obtained by frequency analysis of the sampled pulse pressure waveform data, and detects abnormal conditions of the pulse pressure waveform generated in atrial fibrillation or the like.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-146140 Summary of the invention

[0006] Problems to be solved by the invention

[0007] When a subject suffering from arrhythmia such as atrial fibrillation measures blood pressure using a sphygmomanometer, there is a high possibility that errors will occur in the blood pressure value due to omission of pulse wave signals and fluctuations in the amplitude of the pulse wave signals. Therefore, it is recommended that the subject suffering from arrhythmia measure blood pressure more than once. Therefore, such a subject needs to perform blood pressure measurement operations more than once when measuring his or her own blood pressure.

[0008] In one aspect, an object of the present disclosure is to provide a blood pressure meter and a blood pressure measurement method that can easily and accurately measure the blood pressure of a subject suffering from an arrhythmia.

[0009] Technical Solution

[0010] In one example of the present disclosure, a blood pressure meter is provided, which includes: a blood pressure measuring unit that measures the blood pressure of a user; a monitoring unit that monitors the user's arrhythmia during the first blood pressure measurement performed by the blood pressure measuring unit; and an output control unit that outputs the blood pressure value of the user measured by the blood pressure measuring unit. When the monitoring unit determines that arrhythmia has occurred, the blood pressure measuring unit further measures the blood pressure of the user multiple times or more, and the output control unit outputs the average of the blood pressure value measured during the first blood pressure measurement and the blood pressure values ​​measured during the multiple blood pressure measurements as the blood pressure value of the user.

[0011] According to the above configuration, even a subject suffering from arrhythmia can perform blood pressure measurement simply and accurately.

[0012] In another example of the present disclosure, when the monitoring unit determines that arrhythmia has not occurred, the output control unit outputs the blood pressure value measured in the first blood pressure measurement as the blood pressure value of the user.

[0013] According to the above configuration, the blood pressure value is outputted by only one blood pressure measurement, so that the measurement time and other discomforts are not caused to the subject who does not suffer from arrhythmia.

[0014] In another example of the present disclosure, the blood pressure measurement unit measures the user's blood pressure using an oscillometric method, and the monitoring unit determines whether arrhythmia occurs based on a pulse wave signal obtained during the first blood pressure measurement.

[0015] According to the above configuration, blood pressure measurement and determination of the occurrence of arrhythmia can be performed simultaneously, and there is no need to prepare a separate device for detecting arrhythmia.

[0016] In another example of the present disclosure, the monitoring unit receives an input of an electrocardiogram waveform from the user during the first blood pressure measurement, and determines whether arrhythmia occurs based on the electrocardiogram waveform.

[0017] According to the above configuration, blood pressure measurement and determination of the presence or absence of arrhythmia can be performed simultaneously.

[0018] In another example of the present disclosure, the sphygmomanometer further includes an electrocardiogram waveform measurement circuit that measures an electrocardiogram waveform.

[0019] According to the above configuration, there is no need to separately prepare a device for measuring an electrocardiogram waveform.

[0020] In another example of the present disclosure, the sphygmomanometer is configured to be able to communicate with an electrocardiograph that measures an electrocardiogram waveform.

[0021] According to the above configuration, it is not necessary to provide a function for measuring an electrocardiogram waveform inside the sphygmomanometer.

[0022] In another example of the present disclosure, a blood pressure measurement method performed by a sphygmomanometer is provided. The blood pressure measurement method includes: a step of measuring the blood pressure of a user; a step of determining whether the user has arrhythmia during the first blood pressure measurement; and a step of outputting the measured blood pressure value of the user. In the case where it is determined that arrhythmia has occurred, the step of measuring includes further measuring the blood pressure of the user more than once, and the step of outputting includes outputting the average of the blood pressure value measured during the first blood pressure measurement and the blood pressure values ​​measured during the more than one blood pressure measurements as the blood pressure value of the user.

[0023] According to the above configuration, even a subject suffering from arrhythmia can perform blood pressure measurement simply and accurately.

[0024] Effects of the Invention

[0025] According to the present disclosure, even a subject suffering from arrhythmia can perform blood pressure measurement simply and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a diagram showing a blood pressure monitor according to this embodiment.

[0027] Figure 2 This is a block diagram showing an example of the hardware configuration of the sphygmomanometer according to the first embodiment.

[0028] Figure 3 This is a block diagram showing the functional configuration of the sphygmomanometer according to the first embodiment.

[0029] Figure 4 This is a flowchart showing an example of the processing procedure of the sphygmomanometer according to the first embodiment.

[0030] Figure 5 This is a flowchart showing another example of the processing procedure of the sphygmomanometer according to the first embodiment.

[0031] Figure 6 This is a diagram showing the hardware configuration of the sphygmomanometer according to the second embodiment.

[0032] Figure 7 This is a block diagram showing the functional configuration of the sphygmomanometer according to the second embodiment. DETAILED DESCRIPTION

[0033] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same components are marked with the same reference numerals. Their names and functions are also the same. Therefore, they will not be described in detail again.

[0034] [Application examples]

[0035] Reference Figure 1 , an application example of the present invention is described. Figure 1 It is a diagram showing a sphygmomanometer 100 according to this embodiment.

[0036] 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 , while explaining the processing content.

[0037] exist Figure 1In the embodiment, it is assumed that a user uses the sphygmomanometer 100 to measure his own blood pressure. The sphygmomanometer 100 starts the first blood pressure measurement (with Figure 1 For example, the sphygmomanometer 100 extracts a pulse wave signal (variation component) superimposed on the cuff pressure indicating the internal pressure of a cuff worn on a measured part (eg, arm) of the user, and calculates the blood pressure value by oscillometric method based on the pulse wave signal.

[0038] In addition, the sphygmomanometer 100 uses the pulse wave signal to determine whether arrhythmia occurs during the first blood pressure measurement (with Figure 1 (2) corresponds to).

[0039] Next, when it is determined that arrhythmia has occurred, the sphygmomanometer 100 automatically performs a plurality of additional blood pressure measurements (with Figure 1 That is, even without receiving a blood pressure measurement instruction from the user, the sphygmomanometer 100 automatically starts additional blood pressure measurements. Here, it is assumed that the sphygmomanometer 100 performs additional second and third blood pressure measurements.

[0040] The sphygmomanometer 100 calculates the average of the blood pressure values ​​measured in the first to third blood pressure measurements (average blood pressure value), and displays the average blood pressure value on the display (with the same display as the user's blood pressure value). Figure 1 (4) corresponds to).

[0041] It should be noted that, when the sphygmomanometer 100 determines that arrhythmia has not occurred, the sphygmomanometer 100 displays the blood pressure value calculated at the first blood pressure measurement as the blood pressure value of the user on the display.

[0042] According to the above application example, when arrhythmia of the user is detected during the first blood pressure measurement, multiple or more blood pressure measurements are automatically performed additionally, and the average of the measured blood pressure values ​​is displayed as the blood pressure value of the user. Therefore, for users with arrhythmia, complicated operations such as re-measurement instruction operation are not imposed, and the user can be automatically notified of a high-precision blood pressure value. On the other hand, for users who do not suffer from arrhythmia, the blood pressure value is notified only through one blood pressure measurement, so the user will not feel uncomfortable due to the length of the measurement time, etc.

[0043] As described above, according to the sphygmomanometer 100 of this embodiment, even a subject suffering from arrhythmia can perform blood pressure measurement simply and accurately.

[0044] [Configuration example]

[0045] <Implementation Method 1>

[0046] (Hardware composition)

[0047] Figure 2 1 is a block diagram showing an example of the hardware configuration of the sphygmomanometer 100 according to the first embodiment. 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.

[0048] The processor 110 is a calculation processing unit such as a CPU (Central Processing Unit) or an MPU (MultiProcessing Unit). The processor 110 implements various processes (steps) 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 the blood pressure value on the display 50.

[0049] 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, and data of measurement results of blood pressure values, pulse counts, pulse wave intervals, etc. In addition, the memory 51 is used as a working memory when executing a program, etc.

[0050] The air system assembly 30 supplies air to the fluid bag 22 contained in the cuff 20 or discharges air from the fluid bag 22 contained in the cuff 20 through the gas 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.

[0051] 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 a gas pipe. In order to pressurize the cuff pressure, the pump 32 supplies air as a fluid to the fluid bag 22 via the gas pipe. The valve 33 opens / closes in order to discharge the air in the fluid bag 22 or to seal the air into the fluid bag 22 via the gas pipe to control the cuff pressure.

[0052] The A / D conversion circuit 310 converts the output value of the pressure sensor 31 (e.g., a voltage value corresponding to a 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 a control signal given by the processor 110. The valve drive circuit 330 controls the opening / closing of the valve 33 based on a control signal given by the processor 110.

[0053] When measuring blood pressure according to the ordinary oscillometric method, the following actions are generally performed. Specifically, the cuff is pre-wound around the measured part (wrist, arm, etc.) of the subject. During the measurement, the pump 32 and the valve 33 are controlled to increase the cuff pressure to a level higher than the estimated maximum blood pressure, and then the cuff pressure is gradually 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 taken out as a pulse wave signal. Based on the change in the amplitude of the pulse wave signal (mainly rising and falling) accompanied by the change in the cuff pressure at this time, the maximum blood pressure (systolic blood pressure) and the minimum blood pressure (diastolic blood pressure) are calculated.

[0054] 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.

[0055] 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 receiving a blood pressure measurement instruction from the user.

[0056] (Functional composition)

[0057] Figure 3 2 is a block diagram showing the functional configuration of the sphygmomanometer 100 according to the first embodiment. Figure 3The sphygmomanometer 100 includes a blood pressure measuring unit 210, a monitoring unit 220, and an output control unit 230 as main functional components. These functions are implemented, for example, by causing the processor 110 of the sphygmomanometer 100 to execute a program stored in the memory 51. It should be noted that some or all of these functions may also be implemented by hardware.

[0058] 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 controls the pump 32 to be driven via the pump driving circuit 320 and the valve 33 to be driven via the valve driving circuit 330. The valve 33 is opened / closed in order to discharge or seal air in the fluid bag 22 and control the cuff pressure.

[0059] 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 pressure component, i.e., the pulse wave, superimposed on the cuff pressure signal in synchronization with the heart beat of the user from the cuff pressure signal.

[0060] The blood pressure measuring unit 210 calculates the user's blood pressure information based on the cuff pressure signal and the pulse wave signal superimposed on the cuff pressure signal. Specifically, the blood pressure measuring unit 210 measures the user's blood pressure according to the oscillometric method. For example, in the case of a decompression measuring method in which the pulse wave is detected when the fluid bag 22 is decompressed, the blood pressure measuring unit 210 calculates the highest blood pressure based on the cuff pressure when the amplitude of the pulse wave signal increases sharply (when it rises), the lowest blood pressure based on the cuff pressure when the amplitude of the pulse wave signal decreases sharply (when it falls), the pulse rate, and the pulse pressure. It should be noted that the blood pressure measuring unit 210 may also adopt a so-called pressurization measuring method in which the pulse wave is detected when the fluid bag 22 is pressurized.

[0061] The monitoring unit 220 monitors the user's arrhythmia during the first blood pressure measurement performed by the blood pressure measurement unit 210 (i.e., during the blood pressure measurement performed in accordance with the measurement start instruction from the user). Specifically, the monitoring unit 220 determines whether arrhythmia occurs based on the pulse wave signal obtained (detected) during the first blood pressure measurement. A known method is used for determining arrhythmia. For example, the monitoring unit 220 determines whether arrhythmia occurs based on the generation interval of a plurality of pulse waves obtained from the pulse wave signal.

[0062] When the monitoring unit 220 determines that arrhythmia has occurred, the blood pressure measuring unit 210 further measures the user's blood pressure multiple times or more. Specifically, the blood pressure measuring unit 210 repeatedly measures the user's blood pressure multiple times based on the cuff pressure signal obtained by controlling the cuff pressure and the pulse wave signal superimposed on the cuff pressure signal. Next, the blood pressure measuring unit 210 calculates the average of the blood pressure value measured in the first blood pressure measurement and the blood pressure values ​​measured in the multiple blood pressure measurements, and outputs the average as the measurement result of the user's blood pressure value. Specifically, the output control unit 230 displays the measurement result (in this case, the average value) of the blood pressure measuring unit 210 on the display 50.

[0063] On the other hand, when the monitoring unit 220 determines that arrhythmia has not occurred, the blood pressure measurement unit 210 outputs the blood pressure value measured in the first blood pressure measurement as the measurement result. The output control unit 230 displays the measurement result of the blood pressure measurement unit 210 (in this case, the first blood pressure value) on the display 50. It should be noted that the output control unit 230 can send the measurement result to an external device via the communication interface 53, or can be a structure that outputs sound via a speaker (not shown).

[0064] (Processing process)

[0065] Figure 4 This is a flowchart showing an example of the processing procedure of the sphygmomanometer 100 according to the first embodiment. Figure 4 The process shown is a process of measuring blood pressure by the pressure measurement method. At the start time of the process, it is assumed that the user is wearing the cuff 20 of the blood pressure monitor 100.

[0066] 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 disconnected (stopped) and the valve 33 is opened.

[0067] 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 through the air pipe.

[0068] Next, the processor 110 extracts a pulse wave signal from the cuff pressure signal detected by the pressure sensor 31, attempts to calculate the highest blood pressure (systolic blood pressure) and the lowest blood pressure (diastolic blood pressure) based on the pulse wave signal, and determines whether the blood pressure calculation is completed (step S18).

[0069] If the blood pressure calculation cannot be completed due to insufficient data (No in step S18), the processor 110 repeats the processing of steps S16 and S18 unless the cuff pressure reaches a preset upper limit pressure (e.g., 300 mmHg). If the blood pressure calculation is completed (Yes in step S18), the processor 110 performs the following control: stop the pump 32 (step S20), open the valve 33 (step S22), and exhaust the air in the cuff 20.

[0070] The processor 110 determines whether the current blood pressure measurement (blood pressure calculation) is the first blood pressure measurement (step S24). If it is the first blood pressure measurement (yes in step S24), the processor 110 determines whether arrhythmia occurs based on the pulse wave signal extracted in step S18 (step S26). If arrhythmia occurs (yes in step S26), the processor 110 returns to step S14 and starts additional blood pressure measurement. If arrhythmia does not occur (no in step S26), the processor 110 displays the blood pressure value measured in the first blood pressure measurement as the user's blood pressure value on the display 50 (step S28).

[0071] On the other hand, when it is not the first blood pressure measurement (No in step S24), the processor 110 determines whether the additional blood pressure measurement of more than one time has been completed (step S30). For example, when the number of additional measurements is set to two, the processor 110 determines whether the two additional measurements have been completed. When the additional measurement has not been completed (No in step S30), the process returns to step S14 and the additional measurement of blood pressure is started. When the additional measurement is completed (Yes in step S30), the processor 110 calculates the average of the blood pressure value measured in the first blood pressure measurement and the blood pressure value measured in the additional measurement, and displays the average as the blood pressure value of the user on the display 50 (step S28).

[0072] Figure 5 This is a flowchart showing another example of the processing procedure of the sphygmomanometer 100 according to the first embodiment. Figure 5 The process shown is a process of measuring blood pressure by the decompression measurement method. At the start time of the process, it is assumed that the user is wearing the cuff 20 of the blood pressure monitor 100 .

[0073] Reference Figure 5The processing of steps S50 to S56 is respectively the same as the processing of steps S10 to S16, so their detailed description is omitted.

[0074] The processor 110 estimates the systolic blood pressure based on the pulse wave signal obtained during the pressurization (step S58). The processor 110 determines whether the cuff pressure reaches or exceeds a threshold value Th (step S60). Typically, the threshold value Th is set to a value that is a fixed value (eg, 40 mmHg) higher than the estimated systolic blood pressure value.

[0075] When the cuff pressure is less than the threshold value Th (No in step S60), the processor 110 returns to step S56. When the cuff pressure is greater than the threshold value Th (Yes in step S60), the processor 110 controls the pump 32 to stop (step S62) and gradually opens the valve 33 (step S64). Thus, the process changes from the pressurization process to the decompression process, and the cuff pressure is gradually reduced.

[0076] During the decompression process, the processor 110 extracts the pulse wave signal from the cuff pressure signal detected by the pressure sensor 31, and attempts to calculate the highest blood pressure (systolic blood pressure) and the lowest blood pressure (diastolic blood pressure) based on the pulse wave signal, and determines whether the blood pressure calculation is completed (step S66). In the case where the blood pressure calculation cannot be completed due to insufficient data (no in step S66), the processor 110 repeatedly performs the processing of steps S64 and S66. In the case where the blood pressure calculation is completed (yes in step S66), the processor 110 performs the following control: fully open the valve 33 (step S68) to quickly discharge the air in the cuff 20.

[0077] The processing of steps S70 to S76 is respectively the same as the processing of steps S24 to S30 , and therefore a detailed description thereof will not be given.

[0078] <Implementation Method 2>

[0079] In the first embodiment, the configuration for determining the presence or absence of arrhythmia based on the pulse wave signal is described, whereas in the second embodiment, the configuration for determining the presence or absence of arrhythmia using the electrocardiogram waveform is described.

[0080] (Hardware composition)

[0081] Figure 6 2 is a diagram showing the hardware configuration of a blood pressure monitor 100A according to Embodiment 2. Figure 6 The sphygmomanometer 100A includes a main body 10A, a cuff 20, a reference electrode 35, and a measurement electrode 36. The main body 10A corresponds to the main body 10 of the first embodiment with an electrocardiogram waveform measurement circuit 340 added thereto.

[0082] The reference electrode 35 has at least a surface formed of a conductive material and is a part of the user's body (eg, at least the left or right thumb) that contacts the electrode when measuring the electrocardiogram waveform to remove noise that may be included in the electrocardiogram waveform.

[0083] The measurement electrode 36 has at least a surface formed of a conductive material and is a part of the user's body (eg, the index finger, middle finger, little finger, etc. other than the thumb) that contacts the electrode when measuring an electrocardiogram waveform.

[0084] The user makes fingers other than the left and right thumbs (index finger, middle finger, ring finger) contact the measurement electrodes 36 on the left and right sides. The user makes one or both of the left and right thumbs contact the reference electrode 35. When the user makes the fingers of both hands contact the measurement electrodes 36, the electrocardiogram waveform measurement circuit 340 senses that the measurement electrodes 36 are electrically connected to each other through the user, and starts the measurement of the electrocardiogram waveform using the sensing signal as a trigger. At this time, the left hand or right hand or thumbs of both hands of the user are in contact with the reference electrode 35.

[0085] In this state, there is a potential difference between the signal input to the reference electrode 35 and the signal input to the measuring electrode 36. This potential difference is caused by the difference in path length between the thumb and the fingers other than the thumb. On the other hand, the signal input to the reference electrode 35 and the signal input to the measuring electrode 36 contain noise of substantially the same level. Therefore, the electrocardiogram waveform measurement circuit 340 measures the potential difference between the signal input to the reference electrode 35 via the thumb and the signal input to the measuring electrode 36 via the fingers other than the thumb. The electrocardiogram waveform measurement circuit 340 can obtain an electrocardiogram waveform with little noise influence by amplifying this potential difference.

[0086] (Functional composition)

[0087] Figure 7 2 is a block diagram showing the functional configuration of a sphygmomanometer 100A according to Embodiment 2. Figure 7 The sphygmomanometer 100A includes a blood pressure measuring unit 210, a monitoring unit 220A, and an output control unit 230 as main functional components. The functions of the blood pressure measuring unit 210 and the output control unit 230 are similar to those in Figure 3 The functions are the same as described in .

[0088] The monitoring unit 220A receives input of the electrocardiogram waveform measured by the electrocardiogram waveform measurement circuit 340 during the first blood pressure measurement performed by the blood pressure measurement unit 210. The monitoring unit 220A determines whether arrhythmia occurs based on the electrocardiogram waveform. It should be noted that the electrocardiogram waveform measurement circuit 340 starts measuring the electrocardiogram waveform when the user touches the reference electrode 35 and the measurement electrode 36 as described above. Therefore, the output control unit 230 can display information on the display 50 that prompts the user to touch the reference electrode 35 and the measurement electrode 36 at least during the first blood pressure measurement.

[0089] (Processing process)

[0090] The processing procedure of the second embodiment is equivalent to the arrhythmia determination process of the first embodiment ( Figure 4 Step S26 and Figure 5 Step S72) is replaced by the processor 110 executing the arrhythmia determination process using the electrocardiogram waveform measured by the electrocardiogram waveform measurement circuit 340. However, it is assumed that the user contacts the reference electrode 35 and the measurement electrode 36 during the first blood pressure measurement.

[0091] <Other Implementation Methods>

[0092] (1) In Embodiment 2, the configuration in which the electrocardiogram waveform measuring circuit for measuring the electrocardiogram waveform of the user is included in the sphygmomanometer is described, but the present invention is not limited to this configuration. For example, the sphygmomanometer may be configured to communicate with an electrocardiograph for measuring the electrocardiogram waveform. In this case, the sphygmomanometer 100 (for example, the monitoring unit 220) receives an input of the electrocardiogram waveform measured by the electrocardiograph via the communication interface 53 (receives electrocardiogram waveform information), and determines the presence or absence of arrhythmia based on the electrocardiogram waveform.

[0093] (2) 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 in 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 also be provided by recording in 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.

[0094] (3) The configurations illustrated as examples in the above-mentioned embodiments are examples of the configurations of the present invention, and can be combined with other known technologies, or 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.

[0095] [Note]

[0096] As described above, the present embodiment includes the following disclosures.

[0097] [Composition 1]

[0098] A sphygmomanometer (100) comprises: a blood pressure measuring unit (210) for measuring the blood pressure of a user; a monitoring unit (220) for monitoring arrhythmia of the user during the first blood pressure measurement performed by the blood pressure measuring unit (210); and an output control unit (230) for outputting the blood pressure value of the user measured by the blood pressure measuring unit (210); when the monitoring unit (220) determines that the arrhythmia has occurred, the blood pressure measuring unit (210) further measures the blood pressure of the user more than one time, and the output control unit (230) outputs the average of the blood pressure value measured during the first blood pressure measurement and the blood pressure values ​​measured during the more than one blood pressure measurements as the blood pressure value of the user.

[0099] [Composition 2]

[0100] According to the sphygmomanometer (100) of configuration 1, when the monitoring unit (220) determines that the arrhythmia has not occurred, the output control unit (230) outputs the blood pressure value measured during the first blood pressure measurement as the blood pressure value of the user.

[0101] [Composition 3]

[0102] According to the sphygmomanometer (100) of configuration 1 or 2, the blood pressure measuring unit (210) measures the blood pressure of the user according to the oscillometric method, and the monitoring unit (210) determines whether the arrhythmia occurs based on the pulse wave signal obtained during the first blood pressure measurement.

[0103] [Composition 4]

[0104] According to any one of configurations 1 to 3, the monitoring unit (220A) receives an input of an electrocardiogram waveform of the user during the first blood pressure measurement, and determines whether the arrhythmia occurs based on the electrocardiogram waveform.

[0105] [Composition 5]

[0106] According to the sphygmomanometer (100) according to configuration 4, the sphygmomanometer (100) further includes an electrocardiogram waveform measurement circuit (340), and the electrocardiogram waveform measurement circuit (340) measures the electrocardiogram waveform.

[0107] [Composition 6]

[0108] The sphygmomanometer (100) according to Configuration 4, wherein the sphygmomanometer (100) is configured to be communicable with an electrocardiograph that measures the electrocardiogram waveform.

[0109] [Composition 7]

[0110] A blood pressure measurement method is performed by a sphygmomanometer, the method comprising: a step of measuring a user's blood pressure; a step of determining whether the user has arrhythmia during a first blood pressure measurement; and a step of outputting the measured blood pressure value of the user, wherein, in a case where it is determined that arrhythmia has occurred, the measuring step comprises further measuring the user's blood pressure a plurality of times, and the outputting step comprises outputting the average of the blood pressure value measured during the first blood pressure measurement and the blood pressure values ​​measured during the plurality of blood pressure measurements as the blood pressure value of the user.

[0111] The embodiments disclosed this time should be considered in all respects as illustrative and non-restrictive. The scope of the present invention is indicated by the claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0112] Description of Reference Numerals

[0113] 10, 10A: main body; 20: cuff; 22: fluid bag; 30: air system component; 31: pressure sensor; 32: pump; 33: valve; 35: reference electrode; 36: measuring electrode; 50: display; 51: memory; 52: operation unit; 52A: measuring switch; 53: communication interface; 54: power supply unit; 100, 100A: sphygmomanometer; 110: processor; 210: blood pressure measuring unit; 220, 220A: monitoring unit; 230: output control unit; 310: A / D conversion circuit; 320: pump drive circuit; 330: valve drive circuit; 340: electrocardiogram waveform measuring circuit.

Claims

1. A sphygmomanometer, comprising: A blood pressure measuring unit for measuring the blood pressure of a user; a monitoring unit that monitors arrhythmia of the user during the first blood pressure measurement by the blood pressure measurement unit; and an output control unit that outputs the blood pressure value of the user measured by the blood pressure measurement unit, When the monitoring unit determines that the arrhythmia has occurred, the blood pressure measuring unit further measures the user's blood pressure multiple times or more, and the output control unit outputs the blood pressure value measured in the first blood pressure measurement and the average of the blood pressure values ​​measured in the multiple or more blood pressure measurements as the user's blood pressure value.

2. The sphygmomanometer according to claim 1, wherein: When the monitoring unit determines that the arrhythmia has not occurred, the output control unit outputs the blood pressure value measured in the first blood pressure measurement as the blood pressure value of the user.

3. The sphygmomanometer according to claim 1 or 2, wherein: The blood pressure measuring unit measures the blood pressure of the user according to an oscillometric method. The monitoring unit determines whether the arrhythmia occurs based on the pulse wave signal obtained during the first blood pressure measurement.

4. The sphygmomanometer according to claim 1 or 2, wherein: The monitoring unit receives an input of an electrocardiogram waveform of the user during the first blood pressure measurement. Whether the arrhythmia occurs is determined based on the electrocardiogram waveform.

5. The sphygmomanometer according to claim 4, wherein: The sphygmomanometer further includes an electrocardiogram waveform measurement circuit configured to measure the electrocardiogram waveform.

6. The sphygmomanometer according to claim 4, wherein: The sphygmomanometer is configured to be communicable with an electrocardiograph that measures the electrocardiogram waveform.

7. A blood pressure measurement method, the blood pressure measurement method being performed by a sphygmomanometer, the blood pressure measurement method comprising: The step of measuring the blood pressure of the user; The step of determining whether the user has arrhythmia during the first blood pressure measurement; as well as The step of outputting the measured blood pressure value of the user, When it is determined that the arrhythmia has occurred, the measuring step includes further measuring the user's blood pressure multiple times or more, and the output step includes outputting the blood pressure value measured in the first blood pressure measurement and the average of the blood pressure values ​​measured in the multiple or more blood pressure measurements as the user's blood pressure value.

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