Blood pressure measuring device, control method, and control program

Abstract

To provide a blood pressure measuring device capable of checking measurement information on an information terminal in a short time, and to provide a control method and a control program thereof.SOLUTION: A blood pressure measuring device 100 includes a communication part 15, a processor 11, a pressure sensor 32, and an adjusting mechanism 50 for adjusting the pressure of a cuff 20. The processor 11 performs measurement processing including main processing for acquiring output of the pressure sensor 32 while varying the pressure of the cuff 20 by controlling the adjusting mechanism 50 and deriving blood pressure information on the basis of the output, and post processing for decreasing the pressure of the cuff 20 to a threshold or lower by controlling the adjusting mechanism 50, establishes short-range wireless communication with a smartphone 200, performs transmission processing for transmitting the information acquired by first processing to the smartphone 200 from the communication part 15, and starts the transmission processing at a timing (time T3) before a measurement processing finishing timing (time T4).SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] When recording and analyzing information measured by a blood pressure measuring device, it is preferable that the blood pressure measuring device and the information terminal are communicably connected so that the information terminal can automatically acquire the measurement information, rather than the user inputting 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 by short-range wireless communication such as Bluetooth (registered trademark) is considered.

[0003] Patent document 1 describes a wearable terminal that includes a bio-information measuring unit and a wireless communication unit, in which the wireless communication unit accumulates bio-information including blood pressure data and data indicating the occurrence of irregular pulse waves generated by the bio-information measuring unit, as well as the measurement time, either each time or for a certain period of time, and then transmits the information to a disease onset risk prediction device via a wireless communication network. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-115614 A Summary of the Invention [Problem to be solved by the invention]

[0005] When the amount of information transmitted from the blood pressure measurement device to the information terminal becomes large, it takes a long time to transmit the information. When it takes a long time to transmit the information, for example, even if the blood pressure measurement device has completed measurement and is displaying blood pressure information, it may not be possible to check the measurement results on the information terminal connected to the blood pressure measurement device for a while. Even when the amount of information transmitted from the blood pressure measurement device to the information terminal is small, if it takes a long time to transmit the information, it may not be possible to check the measurement results on the information terminal for a while.

[0006] 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 checked in a short period of time on an information terminal. [Means for solving the problem]

[0007] The technology of the present disclosure is as follows. Note that, in parentheses, corresponding components in the following embodiments are shown, but the present invention is not limited to these.

[0008] (1) A blood pressure measurement device (blood pressure measurement device 100) having 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) that adjusts the pressure of a cuff (cuff 20), The processor, a first process (main process) for acquiring an output of the measurement sensor while varying the cuff pressure by controlling the adjustment mechanism, and deriving blood pressure information (such as systolic blood pressure, diastolic blood pressure, mean blood pressure, pulse rate, or an AI (Augmentation Index) value) based on the output; and a second process (post-process) for controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less. Establish a connection via short-range wireless communication with an information terminal (smartphone 200), and perform a transmission process of transmitting the information obtained in the first process (blood pressure information and pulse wave data obtained in the process of deriving the blood pressure information) from the short-range wireless communication unit to the information terminal, The blood pressure measurement device starts the transmission process at a timing (time T3) prior to the end timing (time T4) of the measurement process.

[0009] According to (1), since the transmission process is started before the measurement process is completed, the time required for the information obtained in the first process to be transmitted to the information terminal can be shortened compared to the case where the transmission process is started after the measurement process is completed. This makes it possible to check blood pressure information, etc. on the information terminal in a short time after the measurement process is completed, thereby improving user satisfaction.

[0010] (2) A blood pressure measuring device according to (1), 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).

[0011] According to (2), the transmission process is not started during the period in which the first process, which includes a process (pulse wave data acquisition process) that may affect the measurement accuracy of the blood pressure information, is performed. This prevents the transmission process from affecting the measurement accuracy of the blood pressure information, thereby improving the measurement accuracy of the blood pressure information.

[0012] (3) A blood pressure measuring device according to (2), The processor starts the transmission process at the timing (time T3) when the first process ends.

[0013] According to (3), information can be transmitted to the information terminal more quickly.

[0014] (4) A blood pressure measuring device according to (1), The processor starts the transmission process when the output of the measurement sensor acquired in the first process satisfies a condition necessary for deriving the blood pressure information.

[0015] According to (4), since the transmission process is started when the conditions required for deriving the blood pressure information are satisfied, it is possible to prevent the transmission 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 transmission process is started during the first process, the time until the information transmission is completed can be further shortened.

[0016] (5) A blood pressure measuring device according to (4), The processor starts the transmission process in the first process during a period between the timing (time T2) when the condition is satisfied and the timing (time T3) when the derivation of the blood pressure information is completed.

[0017] According to (5), since the transmission process is started when the conditions required for deriving the blood pressure information are satisfied, it is possible to prevent the transmission 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 transmission process is started during the first process, the time until the information transmission is completed can be further shortened.

[0018] (6) A blood pressure measuring device according to (5), The processor starts the transmission process at a timing (time T2) when the condition is satisfied in the first process.

[0019] According to (6), the time required to complete information transmission can be further shortened.

[0020] (7) A method for controlling a blood pressure measurement device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting a cuff pressure, comprising the steps of: performing a measurement process including a first process of acquiring an output from the measurement sensor while varying the cuff pressure by controlling the adjustment mechanism and deriving blood pressure information based on the output; and a second process of controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less; Establishing a connection with an information terminal via short-range wireless communication, and performing a transmission process of transmitting the information obtained in the first process from the short-range wireless communication unit to the information terminal; A control method comprising: a processor executing a step of starting the transmission process at a timing prior to a timing at which the measurement process ends.

[0021] (8) A control program for a blood pressure measurement device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting a cuff pressure, comprising: performing a measurement process including a first process of acquiring an output from the measurement sensor while varying the cuff pressure by controlling the adjustment mechanism and deriving blood pressure information based on the output; and a second process of controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less; Establishing a connection with an information terminal via short-range wireless communication, and performing a transmission process of transmitting the information obtained in the first process from the short-range wireless communication unit to the information terminal; A control program that causes a processor to execute a step of starting the transmission process at a timing before a timing at which the measurement process ends. Effect of the Invention

[0022] According to the present invention, it is possible to check the measurement results on an information terminal in a short period of time. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a schematic diagram showing a schematic configuration of a management system. [Diagram 2] FIG. 2 is a timing chart for explaining the processing contents of the processor 11 when measuring blood pressure information. [Diagram 3] FIG. 3 is a timing chart for explaining a modified example of the processing content of the processor 11 when measuring blood pressure information. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] (Overview of the blood pressure measuring device and information terminal of the present disclosure) The blood pressure measurement device and the information terminal in the present disclosure can communicate with each other by short-range wireless communication. When a processor of the blood pressure measurement device, which includes an adjustment mechanism for adjusting the pressure of the cuff and a measurement sensor, detects a measurement operation of blood pressure information, the processor performs a measurement process including a first process of acquiring an output of the measurement sensor while varying the pressure of the cuff by controlling the adjustment mechanism and deriving blood pressure information based on the output, and a second process of controlling the adjustment mechanism to reduce the pressure of the cuff to a threshold or less, establishes a connection with the information terminal via short-range wireless communication, and performs a transmission process of transmitting information obtained in the first process from the short-range wireless communication unit to the information terminal. The processor starts the transmission process at a timing before the end timing of the measurement process. As a result, since the transmission process is started before the end of the measurement process, the time until the information obtained in the first process is completely transmitted to the information terminal can be shortened compared to, for example, a case in which the transmission process is started after the measurement process is ended, and the user's satisfaction can be improved.

[0025] An example of the configuration of a management system including the blood pressure measurement device and information terminal of the present disclosure will be described below.

[0026] (System Configuration) FIG. 1 is a schematic diagram showing a schematic configuration of the management system. The management system includes a blood pressure measurement device 100 and a smartphone 200, which is an example of an information terminal, and is configured so that the blood pressure measurement device 100 and the smartphone 200 can communicate with each other by short-range wireless communication. The information terminal is not limited to a smartphone, and may be a personal computer or a tablet terminal. The method of short-range wireless communication is not particularly limited, and for example, methods such as Wi-Fi, ANT, Bluetooth (registered trademark), or infrared communication can be adopted. In the following, the method of short-range wireless communication will be described as Bluetooth (registered trademark). An owner who owns both the blood pressure measurement device 100 and the smartphone 200 will be referred to as a user in the following.

[0027] (Blood pressure measuring device) The blood pressure measurement device 100 measures blood pressure information of a user (subject) and includes a main body 10, a cuff 20 that can be wrapped around a measurement site (e.g., upper arm) of the user, and an air tube 31 that connects the main body 10 and the cuff 20. "Blood pressure information" is information indicating characteristics of the circulatory system, and includes a pulse wave and indices that can be calculated from the pulse wave, such as systolic blood pressure, diastolic blood pressure, mean blood pressure value, pulse rate, and AI (Augmentation Index) value. In the following description, the blood pressure information is assumed to be systolic blood pressure and diastolic blood pressure.

[0028] The main body 10 includes an air system 30 connected to an air tube 31, an oscillator circuit 33 connected to the air system 30, an adjustment mechanism 50 for adjusting the pressure of the cuff 20, a processor 11, a display unit 12, a memory unit 13, an operation unit 14, a communication unit 15, and a power source 16.

[0029] Air system 30 includes pressure sensor 32 for detecting the pressure (cuff pressure) in air bag 21 provided in cuff 20, pump 51 for supplying air to air bag 21 to increase the cuff pressure, and valve 52 that opens and closes to discharge or fill air in air bag 21. Pressure sensor 32 is one of the measurement sensors used to measure blood pressure information.

[0030] The pressure sensor 32 is, for example, a capacitance type pressure sensor, and the capacitance value changes depending on the cuff pressure. The oscillation circuit 33 is connected to the pressure sensor 32, and outputs a signal with 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 and detects the cuff pressure.

[0031] The adjustment mechanism 50 is a mechanism that adjusts the cuff pressure based on a control signal provided by the processor 11. The adjustment mechanism 50 includes a pump 51 and a valve 52, which are part of the air system 30, as well as a pump drive circuit 53 and a valve drive circuit 54. The pump drive circuit 53 drives the pump 51 based on a control signal provided by the processor 11. The valve drive circuit 54 controls the opening and closing of the valve 52 based on a control signal provided by the processor 11. The adjustment mechanism 50 is not limited to the configuration shown in the figure.

[0032] The display unit 12 is configured, for example, with an organic EL (electro-luminescence) display or a liquid crystal display, and displays measured blood pressure information and the like.

[0033] The storage unit 13 includes a work memory such as a RAM (Random Access Memory) and a non-transitory storage medium such as a flash memory. Various information such as measured blood pressure information is stored in this storage medium. The control program executed by the processor 11 is also stored in this storage medium.

[0034] The operation unit 14 is an input means such as a button or a touch panel that accepts input from the user, and accepts various operations from the user such as turning the power on / off, starting measurement of blood pressure information, selecting items, etc. The operation unit 14 includes, for example, a measurement start button for instructing the start of measurement of blood pressure information.

[0035] The communication unit 15 is a communication interface for performing short-range wireless communication, and includes a communication antenna and various circuits.

[0036] The processor 11 controls each part of the main body 10. The processor 11 is a CPU (Central Processing Unit) which is a general-purpose processor that executes software (programs) and performs various functions, a programmable logic device (PLD) which is a processor whose circuit configuration can be changed after manufacture such as an FPGA (Field Programmable Gate Array), or a dedicated electric circuit which is a processor having a circuit configuration designed exclusively for executing specific processing such as an ASIC (Application Specific Integrated Circuit). The processor 11 may be composed of one processor, or may be composed of a combination of two or more processors of the same type or different types (for example, a plurality of FPGAs, or a combination of a CPU and an FPGA). More specifically, the hardware structure of the processor 11 is an electric circuit (circuitry) which combines circuit elements such as semiconductor elements.

[0037] When processor 11 detects pressing of a measurement start button included in operation unit 14, it accepts an instruction to start measurement, pressurizes cuff 20, and derives blood pressure information based on the output of pressure sensor 32 obtained under an appropriate cuff pressure. Processor 11 displays the derived blood pressure information on display unit 12. Processor 11 also transmits measurement data including the derived blood pressure information and other information such as pulse wave amplitude obtained in the process of deriving the blood pressure information from communication unit 15 to smartphone 200.

[0038] (Information terminal) The smartphone 200 includes a processor 201 , a communication unit 202 , a storage unit 203 , an operation unit 204 , and a display unit 205 .

[0039] The communication unit 202 is a communication interface for performing short-range wireless communication, and includes a communication antenna and various circuits.

[0040] The storage unit 203 includes a work memory such as a RAM, as well as a non-transitory storage medium such as a flash memory.

[0041] An operation unit 204 is an input unit such as a button or a touch panel that receives input from a user, and receives various operations from the user.

[0042] The display unit 205 is configured by, for example, an organic EL display or a liquid crystal display.

[0043] The processor 201 controls 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, the processor 201 stores the measurement data in the storage unit 203. The processor 201 controls the display of the measurement data stored in the storage unit 203 on the display unit 205. This allows the user to check the details of the measurement data obtained by measurement using the blood pressure measurement device 100 on the smartphone 200 and to check the time series changes of multiple measurement data on the smartphone 200.

[0044] (Method of measuring blood pressure information) The processor 11 of the blood pressure measurement device 100 calculates blood pressure information according to the oscillometric method. When the processor 11 detects pressing of the measurement start button, it controls the adjustment mechanism 50 to perform pressurization control to increase the cuff pressure from the initial state to a predetermined value. After pressurizing the cuff pressure to a predetermined value that is sufficiently higher than the user's systolic blood pressure, the processor 11 performs depressurization control to decrease the cuff pressure at a constant rate. During the period in which this depressurization control is being performed, the processor 11 obtains an output signal from the oscillation circuit 33 and converts this output signal into a pressure value to detect the cuff pressure.

[0045] The processor 11 detects, from the detected cuff pressure, a steady pressure (compression pressure applied to the measurement site by the cuff 20) and pulse wave data, which is a pressure component superimposed on the compression pressure in synchronization with the pulse of the living body, for example by filter processing. The processor 11 derives the amplitude value of the detected pulse wave data (hereinafter referred to as pulse wave amplitude), and determines the systolic blood pressure and diastolic blood pressure by a well-known method using data (pulse wave envelope) showing the relationship between the derived pulse wave amplitude and the compression pressure when the pulse wave data was obtained. The processor 11 can also detect the cuff pressure during pressure control and generate a pulse wave envelope. According to the oscillometric method, it can be said that the shape of the pulse wave envelope determines the accuracy of blood pressure calculation.

[0046] In the blood pressure measurement device 100 of this embodiment, the processor 11 controls the measurement data to include at least one of blood pressure information (systolic blood pressure and diastolic blood pressure) derived based on the cuff pressure detected during the decompression control and other information such as pulse wave data obtained in the process of deriving the blood pressure information, and transmits the measurement data to the smartphone 200. When transmitting the measurement data by short-range wireless communication, it is important to prevent noise due to the influence of radio waves and the like from being included in the output of the pressure sensor 32 and the output of the oscillation circuit 33 in order to improve the accuracy of deriving the blood pressure information. In this embodiment, the processor 11 appropriately controls the timing of transmitting the measurement data so as not to affect the accuracy of deriving the blood pressure information. Details of the operation during measurement of blood pressure information will be described below.

[0047] (Measurement operation) 2 is a timing chart for explaining the processing contents of the processor 11 when measuring blood pressure information. In FIG. 2, a measurement-related process related to the measurement of blood pressure information and a communication-related process related to communication by the communication unit 15 are shown.

[0048] When the processor 11 detects a power-on operation of the main body unit 10, it enables the communication function of the communication unit 15. The communication function includes transmitting an advertising signal from the communication unit 15, establishing a connection between the communication unit 15 and an external device that responded to the advertising signal, pairing with the external device, transmitting and receiving data with the external device, and the like. Note that the communication function may be configured to be enabled even when the power of the main body unit 10 is in an OFF state. Methods for disabling the communication function include a method of stopping the supply of power to the communication unit 15, a method of supplying power but putting the communication unit 15 into a suspended state, and the like.

[0049] When processor 11 detects pressing of the measurement start button at time T1, it disables the communication function of communication unit 15. Processor 11 also starts pre-processing for measuring blood pressure information. This pre-processing includes, for example, initialization of a predetermined area of ​​memory unit 13, exhaustion of air from air bag 21, correction of pressure sensor 32, and the like.

[0050] After completing the pre-processing, the processor 11 performs the main processing. This main processing includes a pulse wave data acquisition processing and a blood pressure information derivation processing. The pulse wave data acquisition processing includes a cuff pressure adjustment processing for performing the above-mentioned pressurization control and depressurization control, and a data acquisition processing for processing the cuff pressure detected during the depressurization control to obtain the compression pressure, pulse wave data, and pulse wave amplitude. The pulse wave data acquisition processing can be terminated when the condition required for deriving blood pressure information is satisfied. This condition is that the number of pulse wave amplitudes (or the detected cuff pressures for obtaining them) required to determine the systolic blood pressure and diastolic blood pressure can be obtained.

[0051] The blood pressure information derivation process is a process for determining the systolic and diastolic blood pressures based on the pulse wave envelope that shows the relationship between the pulse wave amplitude and the compression pressure obtained in the data acquisition process. In the example of Fig. 2, after the pre-processing 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 systolic and diastolic blood pressures are determined.

[0052] When the processor 11 ends the blood pressure information derivation process at time T3, it performs a display process to display the determined systolic and diastolic blood pressures on the display unit 12, and in parallel with this, it performs post-processing. This post-processing specifically includes an exhaust process to control the adjustment mechanism 50 to reduce the pressure in the cuff 20 to a threshold value or less. The threshold value is, for example, atmospheric pressure. In other words, the exhaust process is a process to exhaust most of the air injected into the air bag 21 to the outside, thereby enabling the cuff 20 to be removed from the measurement site.

[0053] This post-processing may be started during the period in which the blood pressure information derivation process is performed. That is, the start timing of the post-processing may be between time T2 and time T3. In the example of FIG. 2, the post-processing is started at time T3 and ended at time T4.

[0054] The above pre-processing, main processing, and post-processing constitute a measurement process for measuring blood pressure information. The main processing constitutes a first process, and the post-processing constitutes a second process.

[0055] When the processor 11 ends the blood pressure information derivation process at time T3, it 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 to transmit measurement data including at least one of the blood pressure information including the systolic blood pressure and the diastolic blood pressure determined in the blood pressure information derivation process and the pulse wave data obtained in the derivation process of the blood pressure information from the communication unit 15 to the smartphone 200. In this way, the establishment of the connection with the smartphone 200 and the subsequent transmission of the measurement data to the smartphone 200 are performed in parallel with the post-processing.

[0056] (Effects of the embodiment) According to the blood pressure measurement device 100, preparation for transmitting the measurement data and transmission of the measurement data are possible while the post-processing is being performed. Therefore, compared with a configuration in which preparation for transmitting the measurement data and transmission of the measurement data are possible after the post-processing, the timing at which the measurement data is transferred to the smartphone 200 is completed can be made earlier. After the post-processing is completed and the cuff 20 is removed from the measurement site, the user can check the details of the measurement data on the smartphone 200 without waiting long. As a result, the user's satisfaction can be improved.

[0057] (Modification) The timing for enabling the communication function for the first time after the pressing of the measurement start button is detected may be time T2 as shown in Fig. 3. At time T2, the data of the pulse wave envelope required for determining the blood pressure information has been acquired, so even if the communication function is enabled at this timing, it is possible to prevent an effect on the accuracy of deriving the blood pressure information. By enabling the communication function at time T2, the timing for completing the transfer of the measurement data to the smartphone 200 can be made earlier, which is preferable.

[0058] The timing for enabling the communication function is not limited to time T2, but may be any timing between time T2 and time T3. Even in this case, the timing for completing the transfer of the measurement data to the smartphone 200 can be made earlier than in the operation of FIG.

[0059] The communication function may be enabled a little after the start of post-processing. For example, the communication function may be enabled between time T3 and time T4. Even in this case, the timing at which the measurement data is transferred to the smartphone 200 can be advanced compared to the case where the communication function is enabled after the end of post-processing. Also, since the air in the air bag 21 is rapidly discharged immediately after the start of post-processing, it is possible to perform communication well by enabling the communication function when a certain amount of air has been released. In addition, in the operation of FIG. 2, the start of post-processing between time T2 and time T3 can also prevent communication from starting immediately after the start of post-processing.

[0060] 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 is provided as a measurement sensor instead of the pressure sensor 32 and the oscillator circuit 33. The processor 11 may obtain the amplitude value of the sound detected by the microphone during pressure reduction control instead of the pulse wave amplitude value, and derive blood pressure information based on the amplitude value. [Explanation of symbols]

[0061] 10 Main body 100 Blood pressure measuring device 11,201 processors 12,205 Display section 13,203 Storage section 14,204 Operation section 15,202 Communications Department 16 Power supply 20 Cuff 21 Air Bag 30 Air 31 Air tube 32 Pressure Sensor 33 Oscillator Circuit 50 Adjustment mechanism 51 Pump 52 Valve 53 Pump drive circuit 54 Valve drive circuit 200 Smartphones

Claims

1. A blood pressure measurement device having a short-range wireless communication unit, a processor, a measurement sensor, and an adjustment mechanism for adjusting the pressure of a cuff, The processor: a measurement process including a first process of acquiring an output from the measurement sensor while controlling the adjustment mechanism to vary the cuff pressure and deriving blood pressure information based on the output, and a second process of controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less; establishing a connection via short-range wireless communication with an information terminal, and performing a transmission process of transmitting the information obtained in the first process from the short-range wireless communication unit to the information terminal; The transmission process is started at a timing before the measurement process is ended, The blood pressure measurement device starts the transmission process when the output of the measurement sensor acquired in the first process satisfies a condition necessary for deriving the blood pressure information.

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

3. The blood pressure measurement device according to claim 2, The processor starts the transmission process at a timing when the first process ends.

4. The blood pressure measurement device according to claim 1, The processor starts the transmission process in the first process during a period between the time when the condition is satisfied and the time when derivation of the blood pressure information is completed.

5. The blood pressure measurement device according to claim 4, The processor starts the transmission process at a timing when the condition is satisfied in the first process.

6. A method for controlling a blood pressure measuring device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting cuff pressure, comprising: a measurement process including a first process of acquiring an output from the measurement sensor while controlling the adjustment mechanism to vary the cuff pressure and deriving blood pressure information based on the output, and a second process of controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less; establishing a connection via short-range wireless communication with an information terminal, and performing a transmission process of transmitting the information obtained in the first process from the short-range wireless communication unit to the information terminal; The transmission process is started at a timing before the measurement process is ended, A control method in which a processor executes a step of starting the transmission process when the output of the measurement sensor acquired in the first process satisfies a condition necessary for deriving the blood pressure information.

7. A control program for a blood pressure measuring device having a short-range wireless communication unit, a measurement sensor, and an adjustment mechanism for adjusting the pressure of a cuff, comprising: a measurement process including a first process of acquiring an output from the measurement sensor while controlling the adjustment mechanism to vary the cuff pressure and deriving blood pressure information based on the output, and a second process of controlling the adjustment mechanism to reduce the cuff pressure to a threshold value or less; establishing a connection via short-range wireless communication with an information terminal, and performing a transmission process of transmitting the information obtained in the first process from the short-range wireless communication unit to the information terminal; The transmission process is started at a timing before the measurement process is ended, a control program causing a processor to execute a step of starting the transmission process when the output of the measurement sensor acquired in the first process satisfies a condition necessary for deriving the blood pressure information;

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