Blood pressure measurement device, control method, and control program

Abstract

The invention provides a blood pressure measuring device, a control method thereof and a control program, wherein measurement information can be confirmed in a short time in an information terminal. A blood pressure measurement device (100) is provided with a communication unit (15), a processor (11), a pressure sensor (32), and an adjustment mechanism (50) for adjusting the pressure of a cuff (20), and the processor (11) is configured so as to perform a measurement process including a main process for acquiring the output of the pressure sensor (32) while controlling the adjustment mechanism (50) to vary the pressure of the cuff (20), and a post-process for acquiring the output of the pressure sensor (32) while controlling the adjustment mechanism (50) to vary the pressure of the cuff (20). The post-processing is a process for controlling the adjustment mechanism (50) to reduce the pressure on the cuff (20) to a threshold value or less, and the transmission processing is a process for establishing a short-range wireless communication connection with the smartphone (200) and transmitting the information obtained in the main processing from the communication unit (15) to the smartphone (200), and the post-processing is a process for controlling the adjustment mechanism (50) to reduce the pressure on the cuff (20) to a threshold value or less. The transmission process is started at a timing (time T3) prior to an end timing (time T4) of the measurement process.

Description

Technical Field

[0001] The present invention relates to a blood pressure measuring device, a control method and a control program. Background Art

[0002] When recording and analyzing information measured by a blood pressure measuring device, it is ideal to connect the blood pressure measuring device to an information terminal in a communicative manner so that the information terminal can automatically obtain the measurement information, rather than requiring the user to input the measurement information into the information terminal each time. Specifically, for example, a method in which the information terminal receives the measurement information from the blood pressure measuring device through short-range wireless communication such as Bluetooth (registered trademark) is considered.

[0003] Patent document 1 records a wearable terminal comprising a biological information measuring unit and a wireless communication unit. The wireless communication unit sends blood pressure data generated by the biological information measuring unit, data indicating the occurrence of irregular pulse waves, and biological information at the time of measurement to a disease risk prediction device via a wireless communication network each time or after accumulation for a certain period of time.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-115614 Summary of the invention

[0007] Problems to be solved by the invention

[0008] If the amount of information sent from the blood pressure measurement device to the information terminal increases, it takes time to send the information. When it takes time to send information, for example, the following situation may occur: although the measurement is completed in the blood pressure measurement device and the blood pressure information is displayed, the measurement result cannot be confirmed temporarily in the information terminal connected to the blood pressure measurement device. It should be noted that even if the amount of information sent from the blood pressure measurement device to the information terminal is small, if it takes time to send the information, it may happen that the measurement result cannot be confirmed temporarily in the information terminal.

[0009] An object of the present invention is to provide a blood pressure measurement device, a control method, and a control program that enable measurement information to be confirmed in a data terminal in a short time.

[0010] Solutions for solving problems

[0011] The technology disclosed in the present invention is as follows. It should be noted that, although corresponding components and the like in the following embodiments are shown in parentheses, the present invention is not limited thereto.

[0012] (1) A blood pressure measurement device (blood pressure measurement device 100) comprising a short-range wireless communication unit (communication unit 15), a processor (processor 11), a measurement sensor (pressure sensor 32), and an adjustment mechanism (adjustment mechanism 50) for adjusting the pressure of a cuff (cuff 20), wherein:

[0013] The processor is configured to:

[0014] A measurement process including a first process (main process) and a second process (post-process) is performed, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff, and deriving blood pressure information (maximum blood pressure, minimum blood pressure, average blood pressure value, pulse or AI (Augmentation Index) value, etc.) based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value,

[0015] A sending process is performed, wherein the sending process is a process of establishing a short-range wireless communication connection with an information terminal (smartphone 200) and sending the information obtained in the first process (blood pressure information, pulse wave data obtained in the process of deriving the blood pressure information) from the short-range wireless communication unit to the information terminal,

[0016] The transmission process is started at a timing (time T3) before the end timing (time T4) of the measurement process.

[0017] According to (1), since the transmission process is started before the measurement process is completed, the time until the information obtained in the first process is transmitted to the information terminal can be shortened compared to, for example, the case where the transmission process is started after the measurement process is completed. As a result, after the measurement process is completed, blood pressure information can be confirmed in the information terminal in a short time, which can improve user satisfaction.

[0018] (2) The blood pressure measurement device according to (1), wherein:

[0019] The processor starts the transmission process during a period from when the first process ends to when the second process ends (between time T3 and time T4 ).

[0020] According to (2), the transmission process is not started during the first process including the process (pulse wave data acquisition process) that may affect the measurement accuracy of the blood pressure information. Therefore, the transmission process can be prevented from affecting the measurement accuracy of the blood pressure information, and the measurement accuracy of the blood pressure information can be improved.

[0021] (3) The blood pressure measurement device according to (2), wherein:

[0022] The processor starts the transmission process at the timing (time T3) when the first process is completed.

[0023] According to (3), information can be sent to the information terminal in advance.

[0024] (4) The blood pressure measurement device according to (1), wherein:

[0025] In the first process, the processor starts the transmission process when the output of the measurement sensor obtained satisfies a condition required for deriving the blood pressure information.

[0026] According to (4), since the sending process is started when the conditions required for deriving the blood pressure information are met, the sending process can be prevented from affecting the measurement accuracy of the blood pressure information, thereby improving the measurement accuracy of the blood pressure information. In addition, since the sending process is started in the first process, the time until the information is sent can be further shortened.

[0027] (5) The blood pressure measurement device according to (4), wherein:

[0028] In the first process, the processor starts the transmission process during a period between a timing (time T2) at which the condition is satisfied and a timing (time T3) at which derivation of the blood pressure information is completed.

[0029] According to (5), since the sending process is started when the conditions required for deriving the blood pressure information are met, it is possible to prevent the sending process from affecting the measurement accuracy of the blood pressure information, thereby improving the measurement accuracy of the blood pressure information. In addition, since the sending process is started in the first process, the time until the information is sent can be further shortened.

[0030] (6) The blood pressure measurement device according to (5), wherein:

[0031] In the first process, the processor starts the transmission process at a timing (time T2) when the condition is satisfied.

[0032] According to (6), the time until the transmission of information is completed can be further shortened. (7)

[0034] A control method is a control method for a blood pressure measurement device, the blood pressure measurement device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting the pressure of a cuff, wherein:

[0035] The following steps are performed by the processor:

[0036] performing a measurement process including a first process and a second process, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff and deriving blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value,

[0037] performing a sending process, wherein the sending process is to establish a short-distance wireless communication connection with an information terminal, and to send information obtained in the first process from the short-distance wireless communication unit to the information terminal,

[0038] The transmission process is started at a timing before the end timing of the measurement process. (8)

[0040] A control program is a control program for a blood pressure measuring device, the blood pressure measuring device having a short-range wireless communication unit, a measuring sensor, and an adjustment mechanism for adjusting the pressure of a cuff, wherein:

[0041] The control program causes the processor to execute the following steps:

[0042] performing a measurement process including a first process and a second process, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff and deriving blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value,

[0043] performing a sending process, wherein the sending process is to establish a short-distance wireless communication connection with an information terminal, and to send information obtained in the first process from the short-distance wireless communication unit to the information terminal,

[0044] The transmission process is started at a timing before the end timing of the measurement process.

[0045] Effects of the Invention

[0046] According to the present invention, the measurement result can be confirmed in a short time on the information terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram showing the general structure of the management system.

[0048] Figure 2 This is a timing chart for explaining the processing contents of the processor 11 when measuring blood pressure information.

[0049] Figure 3This is a timing chart for explaining a modified example of the processing content of the processor 11 when measuring blood pressure information. DETAILED DESCRIPTION

[0050] (Overview of the blood pressure measurement device and information terminal of the present disclosure)

[0051] The blood pressure measuring device and the information terminal in the present disclosure can communicate through short-distance wireless communication. In the processor of the blood pressure measuring device including an adjustment mechanism for adjusting the pressure of the cuff and a measurement sensor, when a measurement operation of blood pressure information is detected, a measurement process including a first process and a second process is performed, wherein the first process is a process of controlling the adjustment mechanism to change the pressure of the cuff while obtaining the output of the measurement sensor, and deriving the blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold, and performing a transmission process of establishing a short-distance wireless communication connection with the information terminal and sending the information obtained in the first process from the short-distance wireless communication unit to the information terminal. The processor starts the transmission process at a timing before the end timing of the measurement process. Therefore, since the transmission process is started before the end of the measurement process, for example, compared with the case where the transmission process is started after the end of the measurement process, the time until the information obtained in the first process is sent to the information terminal can be shortened, and the user's satisfaction can be improved.

[0052] Hereinafter, a configuration example of a management system including the blood pressure measurement device of the present disclosure and an information terminal will be described.

[0053] (System Configuration)

[0054] Figure 1 It is a schematic diagram showing the general structure of the management system. The management system includes a blood pressure measuring device 100 and a smart phone 200 as an example of an information terminal, and is configured so that the blood pressure measuring device 100 and the smart phone 200 can communicate through short-range wireless communication. The information terminal is not limited to a smart phone, and may also be a personal computer or a tablet terminal. There is no particular limitation on the method of short-range wireless communication, and for example, methods such as Wi-Fi (registered trademark), ANT, Bluetooth (registered trademark) or infrared communication may be used. In the following, the method of short-range wireless communication is set to Bluetooth (registered trademark) for explanation. In the following, the owner of both the blood pressure measuring device 100 and the smart phone 200 is recorded as a user.

[0055] (Blood pressure measuring device)

[0056] The blood pressure measuring device is a device for measuring the blood pressure information of a user (a person to be measured), and comprises: a main body 10; a cuff 20 that can be wrapped around the user's measurement site (e.g., upper arm); and an air tube 31 that connects the main body 10 to the cuff 20. "Blood pressure information" is information indicating the characteristics of the circulatory system, including a pulse wave and indicators that can be calculated based on the pulse wave, such as the highest blood pressure, the lowest blood pressure, the average blood pressure value, the pulse, and the AI ​​(Augmentation Index) value. In the following, the case where the blood pressure information is the highest blood pressure and the lowest blood pressure is described.

[0057] The main body 10 includes an air system 30 connected to an air tube 31 , an adjustment mechanism 50 for adjusting the pressure of the cuff 20 via an oscillation circuit 33 connected to the air system 30 , a processor 11 , a display unit 12 , a storage unit 13 , an operation unit 14 , a communication unit 15 , and a power source 16 .

[0058] The air system 30 includes a pressure sensor 32 for detecting the pressure (cuff pressure) in the air bag 21 provided in the cuff 20, a pump 51 for supplying air to the air bag 21 to increase the cuff pressure, and a valve 52 for opening and closing to discharge or seal the air in the air bag 21. The pressure sensor 32 is one of the measurement sensors for measuring blood pressure information.

[0059] The pressure sensor 32 is, for example, a capacitive pressure sensor, and its capacitance value varies according to the cuff pressure. The oscillation circuit 33 is connected to the pressure sensor 32, and outputs a signal of an oscillation frequency corresponding to the capacitance value of the pressure sensor 32 to the processor 11. The processor 11 converts the signal obtained from the oscillation circuit 33 into pressure to detect the cuff pressure.

[0060] The adjustment mechanism 50 is a mechanism for adjusting the cuff pressure based on a control signal given by the processor 11. In addition to the pump 51 and the valve 52 as a part of the air system 30, the adjustment mechanism 50 also includes a pump drive circuit 53 and a valve drive circuit 54. The pump drive circuit 53 drives the pump 51 based on the control signal given by the processor 11. The valve drive circuit 54 performs opening and closing control of the valve 52 based on the control signal given by the processor 11. The adjustment mechanism 50 is not limited to the structure shown in the figure.

[0061] The display unit 12 is composed of, for example, an organic EL (electro-luminescence) display or a liquid crystal display, and displays measured blood pressure information and the like.

[0062] The storage unit 13 is configured to include a non-temporary storage medium such as a flash memory in addition to a working memory such as a RAM (Random Access Memory). The storage medium stores various information such as measured blood pressure information. In addition, the storage medium stores a control program for the processor 11 to execute.

[0063] The operation unit 14 is an input unit such as a button or a touch panel that receives input from the user, and receives various operations from the user such as turning the power on / off, starting the measurement of blood pressure information, and selecting an item. The operation unit 14 includes, for example, a measurement start button for instructing the start of the measurement of blood pressure information.

[0064] The communication unit 15 is a communication interface for performing short-range wireless communication, and includes a communication antenna and various circuits.

[0065] The processor 11 performs overall control over the various parts of the main body 10. The processor 11 is a CPU (Central Processing Unit) which is a general-purpose processor that executes software (programs) to perform various functions, a programmable logic device (PLD) such as an FPGA (Field Programmable Gate Array) which is a processor whose circuit structure can be changed after manufacturing, or an ASIC (Application Specific Integrated Circuit) which is a dedicated electrical circuit such as a processor with a circuit structure specially designed for performing specific processing. The processor 11 can be composed of one processor, or a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, CPUs and FPGAs). More specifically, the hardware structure of the processor 11 is an electrical circuit (circuitry) formed by combining circuit elements such as semiconductor elements.

[0066] When the pressing of the measurement start button included in the operation unit 14 is detected, the processor 11 receives the instruction to start the measurement, pressurizes the cuff 20, and derives the blood pressure information based on the output of the pressure sensor 32 obtained at an appropriate cuff pressure. The processor 11 displays the derived blood pressure information on the display unit 12. In addition, the processor 11 transmits the measurement data including the derived blood pressure information and other information such as the pulse wave amplitude obtained in the process of deriving the blood pressure information from the communication unit 15 to the smartphone 200.

[0067] (Information Terminal)

[0068] The smartphone 200 includes a processor 201 , a communication unit 202 , a storage unit 203 , an operation unit 204 , and a display unit 205 .

[0069] The communication unit 202 is a communication interface for performing short-range wireless communication, and includes a communication antenna and various circuits.

[0070] The storage unit 203 is configured to include a non-transitory storage medium such as a flash memory in addition to a working memory such as a RAM.

[0071] The operation unit 204 is an input unit such as buttons or a touch panel for receiving input from the user, and receives various operations from the user.

[0072] The display unit 205 is constituted by, for example, an organic EL display or a liquid crystal display.

[0073] The processor 201 performs overall control of each unit of the smartphone 200. When the processor 201 receives measurement data from the blood pressure measurement device 100 via the communication unit 202, it stores the measurement data in the storage unit 203. The processor 201 controls the display unit 205 to display the measurement data stored in the storage unit 203. Thus, the user can confirm the details of the measurement data obtained by the blood pressure measurement device 100 through the smartphone 200, or can confirm the time series changes of multiple measurement data through the smartphone 200.

[0074] (Method of measuring blood pressure information)

[0075] The processor 11 of the blood pressure measurement device 100 calculates the blood pressure information according to the oscillometric method. When the pressing of the measurement start button is detected, the processor 11 controls the adjustment mechanism 50 to perform a pressurization control to increase the cuff pressure from the initial state to a specified value. After the processor 11 pressurizes the cuff pressure to a sufficiently high specified value above the user's highest blood pressure, it performs a decompression control to reduce the cuff pressure at a certain speed. During the decompression control, the processor 11 obtains the output signal of the oscillation circuit 33 and converts the output signal into a pressure value to detect the cuff pressure.

[0076] The processor 11 detects the steady-state pressure (the compression pressure of the cuff 20 on the measurement site) and the pulse wave data as the pressure component superimposed on the compression pressure in synchronization with the pulse of the biological body from the detected cuff pressure by, for example, filtering processing. The processor 11 derives the amplitude value of the detected pulse wave data (hereinafter referred to as the pulse wave amplitude), and uses the data (pulse wave envelope) representing the relationship between the derived pulse wave amplitude and the compression pressure when the pulse wave data is obtained, and determines the maximum blood pressure and the minimum blood pressure by a known method. It should be noted that the processor 11 can also detect the cuff pressure and generate the pulse wave envelope during the pressurization control. According to the oscillometric method, it can be said that the shape of the pulse wave envelope affects the accuracy of the blood pressure value calculation.

[0077] In the blood pressure measurement device 100 of this embodiment, the processor 11 performs the following control: at least one of the blood pressure information (maximum blood pressure and minimum blood pressure) derived based on the cuff pressure detected in the decompression control and other information such as pulse wave data obtained in the derivation process of the blood pressure information is used as measurement data, and the measurement data is sent to the smartphone 200. When the measurement data is sent through short-range wireless communication, it is important to improve the derivation accuracy of the blood pressure information: the output of the pressure sensor 32 and the output of the oscillation circuit 33 do not contain noise caused by the influence of radio waves, etc. In this embodiment, the processor 11 appropriately controls the transmission timing of the measurement data, thereby not affecting the derivation accuracy of the blood pressure information. The following is a detailed description of the operation when measuring the blood pressure information.

[0078] (Measurement action)

[0079] Figure 2 This is a timing chart for explaining the processing contents of the processor 11 when measuring blood pressure information. Figure 2 , measurement-related processing related to the measurement of blood pressure information and communication-related processing related to the communication performed by the communication unit 15 are shown.

[0080] When the power-on operation of the main body 10 is detected, the processor 11 enables the communication function implemented by the communication unit 15. The communication function includes sending a notification signal from the communication unit 15, establishing a connection between the communication unit 15 and an external device that responds to the notification signal, pairing with the external device, and sending and receiving data with the external device. It should be noted that it is also possible to set a configuration in which the communication function is effective even when the power of the main body 10 is disconnected. As a method of disabling the communication function, a method of stopping the power supply to the communication unit 15, a method of supplying power but putting the communication unit 15 in a suspended state, etc. can be cited.

[0081] When the pressing of the measurement start button is detected at time T1, the processor 11 disables the communication function implemented by the communication unit 15. In addition, the processor 11 starts preprocessing for measuring blood pressure information. This preprocessing includes, for example, initialization of a predetermined area of ​​the storage unit 13, exhaustion of air in the air bag 21, or calibration of the pressure sensor 32.

[0082] When the processor 11 finishes the pre-processing, it performs the main processing. The main processing includes pulse wave data acquisition processing and blood pressure information derivation processing. The pulse wave data acquisition processing includes: cuff pressure adjustment processing, which performs the above-mentioned pressurization control and decompression control; and data acquisition processing, which processes the cuff pressure detected in the decompression control to obtain compression pressure, pulse wave data and pulse wave amplitude. The pulse wave data acquisition processing can be ended at a time point when the conditions required for the derivation of blood pressure information are met. The condition refers to obtaining the pulse wave amplitude (or the detection cuff pressure used to obtain the pulse wave amplitude) required to determine the highest blood pressure and the lowest blood pressure.

[0083] The blood pressure information derivation process is a process for determining the maximum blood pressure and the minimum blood pressure based on the pulse wave envelope curve indicating the relationship between the pulse wave amplitude and the compression pressure obtained in the data acquisition process. Figure 2 In the example of , after the preprocessing is completed, the pulse wave data acquisition process is completed at time T2, and then the blood pressure information derivation process is completed at time T3, and the highest blood pressure and the lowest blood pressure are determined.

[0084] When the blood pressure information derivation process is completed at time T3, the processor 11 performs a display process of displaying the determined highest blood pressure and lowest blood pressure on the display unit 12, and performs post-processing in parallel. The post-processing specifically includes an exhaust process of controlling the adjustment mechanism 50 to reduce the pressure of the cuff 20 to below a threshold. The threshold is, for example, atmospheric pressure. That is, the exhaust process is a process for exhausting most of the air injected into the air bag 21 to the outside so that the cuff 20 can be detached from the measurement site.

[0085] The post-processing may also be started during the blood pressure information derivation process. That is, the start timing of the post-processing may also be between time T2 and time T3. Figure 2 In the example, post-processing starts at time T3 and ends at time T4.

[0086] The above-mentioned pre-processing, main processing and post-processing constitute the measurement processing of measuring blood pressure information. The main processing constitutes the first processing, and the post-processing constitutes the second processing.

[0087] When the blood pressure information export process is completed at time T3, the processor 11 enables the communication function and establishes a connection between the communication unit 15 and the smartphone 200. Then, the processor 11 performs a transmission process of sending measurement data including at least one of the blood pressure information and the pulse wave data from the communication unit 15 to the smartphone 200, wherein the blood pressure information includes the highest blood pressure and the lowest blood pressure determined in the blood pressure information export process, and the pulse wave data is the data obtained in the process of exporting the blood pressure information. In this way, the connection with the smartphone 200 is established and the subsequent measurement data is sent to the smartphone 200 in parallel with the post-processing.

[0088] [Effects of implementation methods]

[0089] According to the blood pressure measurement device 100, during the post-processing, preparation for sending the measurement data and sending the measurement data can be performed. Therefore, compared with a configuration in which preparation for sending the measurement data and sending the measurement data can be performed after the post-processing, the timing of completing the transmission of the measurement data to the smartphone 200 can be advanced. After the post-processing is completed and the cuff 20 is removed from the measurement site, the user can confirm the details of the measurement data on the smartphone 200 without waiting for a long time. As a result, the user's satisfaction can be improved.

[0090] (Variation)

[0091] After the measurement start button is detected to be pressed, the timing for starting to enable the communication function is as follows: Figure 3 As shown, it can also be set to time T2. This is because at time T2, the data acquisition of the pulse wave envelope required for determining the blood pressure information is completed, so even if the communication function is enabled at this timing, it can prevent the accuracy of the blood pressure information from being affected. By enabling the communication function at time T2, the timing of completing the transmission of the measurement data to the smartphone 200 can be advanced, which is preferred.

[0092] In addition, the timing for making the communication function effective is not limited to time T2, and may be any timing between time T2 and time T3. Figure 2 Compared with the action of , the timing of completing the transmission of the measurement data to the smartphone 200 can also be advanced.

[0093] It should be noted that the communication function can also be enabled at a time after a short period of time has passed since the start of post-processing. For example, the communication function can be enabled between time T3 and time T4. Even in such a case, the timing of transmission of the measurement data to the smartphone 200 can be advanced compared to the case where the communication function is enabled after the end of post-processing. In addition, since the air in the air bag 21 is rapidly discharged immediately after the start of post-processing, good communication can be achieved by enabling the communication function at a time after the air is discharged to a certain extent. It should be noted that during Figure 2 In the operation of , by setting the start timing of the post-processing to between time T3 and time T4, it is also possible to prevent the communication from starting right after the post-processing starts.

[0094] So far, an example of deriving blood pressure information by the oscillometric method has been shown, but the processor 11 may detect Korotkoff sounds and derive blood pressure information based on the detected Korotkoff sounds. In this case, a microphone as a measurement sensor is provided instead of the pressure sensor 32 and the oscillation circuit 33. The processor 11 may obtain the amplitude value of the sound detected by the microphone instead of the pulse wave amplitude value during the pressure reduction control, and derive blood pressure information based on the amplitude value.

[0095] Various embodiments have been described above, but the present invention is certainly not limited to the examples described. Those skilled in the art can obviously think of various variations or modifications within the scope described in the claims, and it should be understood that these variations or modifications also belong to the technical scope of the present invention. In addition, the various constituent elements in the above embodiments may be arbitrarily combined within the scope of the gist of the invention.

[0096] It should be noted that the present application is based on a Japanese invention application (Japanese Patent Application No. 2023-037507) filed on March 10, 2023, the contents of which are incorporated herein by reference.

[0097] Description of Reference Numerals

[0098] 10: Main body;

[0099] 100: blood pressure measuring device;

[0100] 11, 201: processor;

[0101] 12, 205: display unit;

[0102] 13, 203: storage unit;

[0103] 14, 204: operation department;

[0104] 15, 202: Ministry of Communications;

[0105] 16: Power supply;

[0106] 20: Cuff;

[0107] 21: Air bag;

[0108] 30: Air system;

[0109] 31: Air pipe;

[0110] 32: pressure sensor;

[0111] 33: Oscillation circuit;

[0112] 50: Adjustment mechanism;

[0113] 51: Pump;

[0114] 52: valve;

[0115] 53: pump drive circuit;

[0116] 54: valve drive circuit;

[0117] 200: Smartphone.

Claims

1. A blood pressure measurement device comprising a short-range wireless communication unit, a processor, a measurement sensor, and an adjustment mechanism for adjusting the pressure of a cuff, wherein: The processor is configured to: performing a measurement process including a first process and a second process, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff and deriving blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value, performing a sending process, wherein the sending process is to establish a short-distance wireless communication connection with an information terminal, and to send information obtained in the first process from the short-distance wireless communication unit to the information terminal, The transmission process is started at a timing before the end timing of the measurement process.

2. The blood pressure measurement device according to claim 1, wherein: The processor starts the transmission process during a period from when the first process is completed to when the second process is completed.

3. The blood pressure measurement device according to claim 2, wherein: The processor starts the transmission process at the timing when the first process is finished.

4. The blood pressure measurement device according to claim 1, wherein: In the first process, the processor starts the transmission process when the output of the measurement sensor obtained satisfies a condition required for deriving the blood pressure information.

5. The blood pressure measurement device according to claim 4, wherein: In the first process, the processor starts the transmission process during a period between a timing when the condition is satisfied and a timing when the derivation of the blood pressure information is completed.

6. The blood pressure measurement device according to claim 5, wherein: In the first process, the processor starts the transmission process at a timing when the condition is satisfied.

7. A control method, which is a control method for a blood pressure measurement device, the blood pressure measurement device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting the pressure of a cuff, wherein: The following steps are performed by the processor: performing a measurement process including a first process and a second process, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff and deriving blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value, performing a sending process, wherein the sending process is to establish a short-distance wireless communication connection with an information terminal, and to send information obtained in the first process from the short-distance wireless communication unit to the information terminal, The transmission process is started at a timing before the end timing of the measurement process.

8. A control program for a blood pressure measuring device, the blood pressure measuring device comprising a short-range wireless communication unit, a measuring sensor, and an adjustment mechanism for adjusting the pressure of a cuff, wherein: The control program causes the processor to execute the following steps: performing a measurement process including a first process and a second process, wherein the first process is a process of obtaining an output of the measurement sensor while controlling the adjustment mechanism to change the pressure of the cuff and deriving blood pressure information based on the output, and the second process is a process of controlling the adjustment mechanism to reduce the pressure of the cuff to below a threshold value, performing a sending process, wherein the sending process is to establish a short-distance wireless communication connection with an information terminal, and to send information obtained in the first process from the short-distance wireless communication unit to the information terminal, The transmission process is started at a timing before the end timing of the measurement process.

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