JP2012040198A - Electronic sphygmomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic sphygmomanometer eliminating the need for power supply from the outside.SOLUTION: The electronic sphygmomanometer 100 includes a cuff portion 110, a body portion 130, and a bulb 140. The body portion 130 further includes an air release valve, an air release button 132, a turbine power generation unit for generating power by rotating a turbine by air sent from the bulb 140, a charge unit charged with power supplied from the turbine power generation unit, and a passive constant-speed air release valve 124 for sending air in the cuff portion 110 to the air release valve at a predetermined speed in the process of decompression of the cuff portion 110.

Description

  The present invention relates to an electronic blood pressure monitor.

  Blood pressure monitors currently used in the medical field automatically perform manual sphygmomanometers such as mercury sphygmomanometers and aneroid sphygmomanometers that use auscultation methods, as well as pressurization, decompression, and determination of blood pressure values. There are two types of sphygmomanometers, automatic sphygmomanometers.

  The manual blood pressure monitor does not require a power source, is small and easy to carry, and thus has the mobility that it can cope with any medical situation. On the other hand, the measurement accuracy depends on the ability of the individual and has the disadvantage of poor objectivity.

  On the other hand, the automatic sphygmomanometer is easy to operate because all the pressurization and decompression are performed automatically, and the determination result of the blood pressure value is performed by software, so the measurement result is objective. There are advantages. On the other hand, the current automatic sphygmomanometer cannot avoid mounting a large pressurization mechanism or a large power supply for operation (or can only be used in a place where power supply for operation can be supplied). However, it is disadvantageous in that it is large in size, inconvenient to carry and inferior in mobility.

  Under such circumstances, recently, an electronic sphygmomanometer configured to combine both advantages and perform only the pressurizing mechanism manually has been proposed (for example, see Patent Document 1 below).

JP 2006-75436 A

  However, in the case of the electronic sphygmomanometer disclosed in Patent Document 1, a power supply for operation is still necessary, and the user must ensure a power supply for operation (battery or power network) in advance when measuring blood pressure. There is a problem of not becoming.

  On the other hand, if a power generation function can be installed in the electronic sphygmomanometer itself, the user can be freed from the limitation of the place of use and the risk of running out of the battery, and the mobility of the electronic sphygmomanometer can be improved.

  In addition, it can be used even in areas where the diffusion of batteries is not sufficient in the first place, such as in developing countries, and in areas where the diffusion of the home power grid is not sufficient. Expected.

  The present invention has been made in view of the above problems, and an object thereof is to provide an electronic sphygmomanometer that does not require external power supply.

In order to achieve the above object, an electronic blood pressure monitor according to the present invention has the following configuration. That is,
An electronic sphygmomanometer that measures the blood pressure of a subject,
A cuff attached to the measurement site of the subject;
A main body provided with a control unit that calculates a blood pressure value of the subject based on a pressure value in a decompression process of the cuff part that is attached and pressurized to the measurement site;
An air balloon that pressurizes the cuff part by sending air into the cuff part via the main body part, and
The main body further includes:
A discharge path for discharging the air sent from the cuff part or the air sent from the air balloon in the decompression process of the cuff part to the outside of the main body part, and the air sent from the air balloon to the cuff part An exhaust valve capable of switching the air flow path between the air supply path and the air supply path,
An exhaust button having a mechanism for manually switching the flow path of the exhaust valve;
A turbine power generation unit configured to generate power by rotating a turbine disposed on the air supply path between the air supply bulb and the exhaust valve by air sent from the air supply bulb;
In order to drive the control unit, a charging unit that charges electric power provided from the turbine power generation unit,
When the air in the cuff part is disposed on the discharge path between the exhaust valve and the cuff part and discharges the air in the cuff part so that the pressure in the cuff part is reduced at a constant speed in the pressure reducing process of the cuff part. Further, a passive constant-speed exhaust valve whose orifice diameter is changed by the pressure in the cuff part is further provided.

  According to the present invention, it is possible to provide an electronic sphygmomanometer that does not require external power supply.

It is a figure showing the appearance composition of electronic sphygmomanometer 100 concerning one embodiment of the present invention. 2 is a diagram illustrating a configuration of a display unit of the electronic blood pressure monitor 100. FIG. 2 is a diagram showing a functional configuration of an electronic blood pressure monitor 100. FIG. It is a figure for demonstrating the exhaust_gas | exhaustion mechanism and turbine electric power generation mechanism of the electronic blood pressure meter. 2 is a state transition diagram of the electronic sphygmomanometer 100. FIG. 4 is a flowchart illustrating a flow of a charging state display process in a state during measurement of the electronic blood pressure monitor 100. It is a figure which shows an example of the display content of the display part at the time of the charge condition display process of the electronic blood pressure monitor. 4 is a flowchart showing a flow of measurement processing of the electronic blood pressure monitor 100. 4 is a flowchart showing a flow of measurement processing of the electronic blood pressure monitor 100. 4 is a flowchart showing a flow of measurement processing of the electronic blood pressure monitor 100. It is a figure which shows an example of the display content of the display part at the time of the measurement process of the electronic blood pressure monitor. It is a figure which shows an example of the display content of the display part at the time of the measurement process of the electronic blood pressure monitor. It is a flowchart which shows the flow of a measurement process of an electronic sphygmomanometer.

  First, an outline of the electronic blood pressure monitor according to each embodiment of the present invention will be described. The electronic sphygmomanometer of each embodiment described below is characterized in that it has a power generation function and can measure blood pressure even without external power supply.

  The installed power generation function is characterized in that in addition to the photovoltaic power generation function, it has a turbine power generation function that uses air blowing during cuff pressurization.

  In addition, in order to be able to maintain blood pressure measurement based on the power supplied by the power generation function for a longer period of time (that is, for power saving), supply of air to the cuff / air in the cuff It is configured to discharge manually (configuration that supplies air by air balloon, configuration that manually opens and closes the exhaust valve, and configuration that uses passive constant-speed exhaust valve), and reduces power consumption in blood pressure measurement as much as possible In addition, there is a feature in that a charging unit (supercapacitor or rechargeable battery) is provided to store the power supplied by the power generation function.

  In the case of a conventional automatic sphygmomanometer, an automatic repressurization function is provided to repressurize when the cuff pressure is lower than the maximum blood pressure value. If the air is to be discharged manually, the user may start to reduce the cuff pressure with the cuff being insufficiently pressurized. For this reason, the electronic sphygmomanometer according to each embodiment described below is further characterized in that a process for accurately determining insufficient cuff pressurization is added in consideration of such a situation.

  In addition, when there is insufficient pressure during measurement, or when residual pressure remains in the cuff at the start and end of measurement, a message corresponding to the internal status is displayed at the appropriate timing, and manual operation is performed. This is further characterized in that the user can correctly perform the above. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
1. FIG. 1 shows an external configuration of an electronic sphygmomanometer (a non-invasive electronic sphygmomanometer that performs measurement by wrapping a cuff around a measurement site of a subject) according to an embodiment of the present invention. FIG.

  As shown in FIG. 1, the electronic sphygmomanometer 100 includes a cuff unit 110 wound around a measurement site of a user and a main body unit 130, and the main body unit 130 controls the entire electronic sphygmomanometer 100. , A pressure sensor for measuring cuff pressure and pulse wave, a control unit for operating a K sound processing unit for detecting Korotkoff sound, and the cuff unit 110 and an air supply / exhaust mechanism for sending and receiving air A turbine power generation mechanism that generates power using the air and a photovoltaic power generation mechanism that generates power using room light or sunlight are housed.

  The cuff part 110 and the main body part 130 are connected by a cuff tube assembly (pipe / wiring part) 120, and the user repeats the pumping operation on the lower side of the main body part 130, An air supply balloon (pressurized rubber balloon) 140 for supplying air to the cuff part 110 is arranged via the main body part 130 and the cuff tube assembly (pipe / wiring part) 120. Hereinafter, the details of each of the units 110 to 140 will be described.

  The cuff part 110 includes a male hook-and-loop fastener 112 and a female hook-and-loop fastener 113 for winding and fixing the cuff cloth 111 around the measurement site of the user. Further, a cuff (air bag) 114 is disposed inside the cuff cloth 111. The cuff 114 compresses the measurement site of the user around which the cuff cloth 111 is wound by raising the internal pressure to the maximum blood pressure value or more by the air sent through the cuff tube assembly (pipe / wiring unit) 120. Then, it will block the arterial blood vessels. Further, a K sound detector 115 is disposed inside the cuff cloth 111. The K sound detection unit 115 is configured such that the air in the cuff 114 is gradually discharged by a passive constant speed pressure reducing valve (described later) from the state where the measurement site is blocked, and the pressure in the cuff 114 is reduced to a minimum blood pressure or less. Thus, the Korotkoff sound generated when the ischemic state is released and the blood flow is resumed can be detected.

  The cuff tube assembly (pipe / wiring unit) 120 receives the K sound signal detected by the tube 121 that conveys the air sent to the cuff unit 110 and the air discharged from the cuff unit 110, and the K sound detection unit 115. Wiring 122 for transmitting to the main body 130 is provided. In addition, a triple plug 123 (connected to the main body 130 via the wiring connector 126 and the piping connectors 125 and 127) for connecting the tube 121 and the wiring 122 to the main body 130 is provided. The triple plug 123 is provided with a passive constant speed exhaust valve for reducing the pressure in the cuff part 110 at a constant speed (constant speed reduction). The passive constant speed exhaust valve realizes constant speed depressurization by changing the orifice diameter according to the pressure in the cuff part 110 on the discharge path for discharging the air in the cuff part 110 to the outside. For this reason, although it is set as the structure distribute | arranged in the triple plug 123 in the example of FIG. 1, it is not limited to this, If it is on a discharge path, it can distribute | arrange in arbitrary positions.

  The main body part 130 is provided with a main body side connector 131 on its upper side surface, and the triple plug 123 of the cuff tube assembly (pipe / wiring part) 120 is connected to the main body part 130 via the main body side connector 131. Connected to. In addition, a toggle operation type exhaust button 132 having a mechanism for switching the air flow path is provided on the upper surface of the main body 130, and is accommodated in the main body 130 when the exhaust valve is switched to the exhaust side by being pressed. The flow path of the exhaust valve thus opened is fully opened to the atmosphere side, whereby the air in the cuff part 110 is discharged to the outside. In addition, a solar battery cell 133 is disposed on the upper surface of the main body 130, and is configured to generate power when irradiated with light. The generated electric power is charged in a charging unit (supercapacitor or rechargeable battery) in the main body 130 so that the electronic sphygmomanometer 100 can be operated even when no power is generated.

  Further, a display unit 134 composed of an LCD or the like is disposed on the upper surface of the main body unit 130. The display unit 134 displays to the user an internal state of the electronic blood pressure monitor 100, an instruction for prompting the user to perform a predetermined operation, and a measurement result. Further, a power button 135 is arranged on the upper surface of the main body 130. The power button 135 is configured such that the power is turned on when pressed once and the power is turned off when pressed again.

  On the other hand, on the side surface opposite to the mounting surface of the main body side connector 131 of the main body portion 130, there is a connection portion 136 for supporting the air supply ball 140 and guiding the air sent out from the air supply ball 140 into the main body portion 130. Is provided. The air sent out from the air balloon 140 into the main body 130 rotates a turbine (not shown) in the main body 130. Thereby, in the electronic blood pressure monitor 100, every time air is sent out from the air balloon 140 into the main body 130, a turbine power generation unit (not shown) generates power. Details of the air supply / exhaust mechanism and the turbine power generation mechanism in the main body 130 will be described later.

  The air supply ball 140 is connected to the main body 130 via the connection portion 136. A check valve is provided on the end surface of the connection portion 136 in the air balloon 140. The check valve crushes the air supply ball 140 and is fully opened when the air in the air supply ball 140 is sent out toward the main body 130 through the connection portion 136, and when the air flow is reversed, the check valve is fully opened. Close. Thereby, the air in the main body 130 is prevented from flowing back into the air balloon 140.

  A tail valve 142 (a kind of ball type check valve) is provided at the end of the air supply ball 140 (the end opposite to the side connected to the connection portion 136). 140 Inflow of air outside the air balloon 140 and crushing the air balloon 140 are prevented from flowing out of the air inside the air balloon 140. Specifically, when the air balloon 140 is in a positive pressure state by being pressed, the air inside the air balloon 140 is prevented from flowing out to the outside via the buttocks valve 142. The valve 142 is fully closed. On the other hand, when the pressed air balloon 140 is released from the pressed state and the inside is in a negative pressure state during restoration, the tail valve 142 is fully opened so that the air outside the air balloon 140 flows into the interior. It becomes.

2. Configuration of Display Unit Next, the configuration of the display unit 134 disposed on the upper surface of the main body unit 130 will be described. As shown in FIG. 2, the display unit 134 includes a systolic blood pressure value display area 201 that displays a systolic blood pressure value measured by the electronic sphygmomanometer 100, and a diastolic blood pressure value display area 202 that displays a diastolic blood pressure value. Further, a pulse value / pressure value display area 203 for displaying a pulse value when measuring the maximum blood pressure value and the minimum blood pressure value, or a pressure value inside the cuff 114 while the cuff 114 is being pressurized is provided.

  Further, the display unit 134 displays an instruction for prompting a user to perform a predetermined operation, an internal state of the electronic sphygmomanometer 100, and the like at an appropriate timing when measuring blood pressure, A charge state display area 205 for displaying the state of charge (charging amount, charging the photovoltaic power generation unit, charging the turbine power generation unit, insufficient charging, etc.) is provided.

3. Functional configuration of main body of electronic sphygmomanometer Next, the functional configuration within the main body 130 of the electronic sphygmomanometer 100 will be described with reference to FIG. FIG. 3 is a diagram illustrating a functional configuration of the main body 130 of the electronic sphygmomanometer 100.

  In FIG. 3, reference numeral 301 denotes a pressure sensor, which operates when a constant current is applied from the control unit 303, detects the pressure in the cuff 114 by a voltage value, amplifies the obtained voltage signal, and then controls the control unit. The data is output to an A / D converter (not shown) in 303. Reference numeral 302 denotes a K sound processing unit, which amplifies the signal detected by the K sound detection unit 115 and received via the wiring connector 126, and then performs a predetermined filter process to extract the K sound signal and extract the extracted K The sound signal is output to an A / D converter (not shown) in the control unit 303.

  A power button 304 corresponds to the power button 135 in FIG. 1 and switches the electronic sphygmomanometer 100 between a power-off state and a measuring state. Reference numeral 305 denotes a buzzer that emits a warning sound or the like under the control of the control unit 303 when pressure is insufficient, when there is residual pressure in the cuff at the start of measurement, or when exhaust is not performed after the measurement is completed. Output. Reference numeral 306 denotes a display unit (corresponding to the display unit 134 in FIG. 1), and a signal from the control unit 303 (a signal indicating a measurement result or a signal for prompting a predetermined operation, an internal state or a charge) Various displays are performed based on a signal indicating the state).

  Reference numeral 307 denotes a turbine, which is attached on the pipe in the main body 130 for sending the air sent from the air balloon 140 into the main body 130 to the tube 121 via the pipe connector 125. It is configured to rotate by the force of air sent into the section 130.

  A turbine power generation unit 308 generates power when the turbine 307 rotates. The electric power generated in the turbine power generation unit 308 is sent to the charging unit 312 via the power supply control unit 313 and charged by the charging unit 312.

  Reference numeral 309 denotes an exhaust valve. When the exhaust valve 310 is switched to a closed state (closed state) by the exhaust button 310 (corresponding to the exhaust button 132 in FIG. 1), the air sent from the air balloon 140 is sent to the cuff unit 110 side. .

  On the other hand, when the exhaust button 310 is switched to the exhaust side (open state), the air sent from the cuff part 110 side is discharged to the outside of the main body part 130. In addition, the air sent out from the air balloon 140 is discharged to the outside of the main body 130.

  A photovoltaic power generation unit 311 generates power based on indoor light received by the solar battery cell 133, sunlight, or the like. The electric power generated by the photovoltaic power generation unit 311 is sent to the charging unit 312 via the power supply control unit 313 and charged by the charging unit 312.

  Reference numeral 312 denotes a charging unit (for example, a supercapacitor or a rechargeable battery), which charges power sent from the turbine power generation unit 308 and the photovoltaic power generation unit 311 and supplies power to the control unit 303. In the following description, it is assumed that a rechargeable battery (secondary battery) is used as the charging unit 312.

  The power supply control unit 313 has a function for monitoring the charging unit 312. Specifically, an overcharge prevention function for preventing overcharging of the charging unit 312 and a constant voltage function for supplying a constant voltage to the control unit 303 are provided. These functions are realized as hardware, and are configured to function even when power is not supplied to the control unit 303 (that is, even when the CPU is not operating). ing.

  The control unit 303 is activated by turning on the power button 304. In the control unit 303, the K sound extracted based on the output from the K sound processing unit 302 while the air in the cuff 114 is depressurized at a constant speed by the passive constant speed exhaust valve (that is, in the depressurization process). Based on the signal and the pressure signal detected based on the output from the pressure sensor 301, the user's systolic blood pressure value and diastolic blood pressure value are detected, and the pulse rate is calculated. Further, control is performed so that the calculated maximum blood pressure value, minimum blood pressure value, and pulse rate are displayed on the display unit 306. Furthermore, in calculating the maximum blood pressure value, the minimum blood pressure value, and the pulse rate, the control unit 303 gives instructions for prompting the user to perform a predetermined operation and the internal state of the electronic sphygmomanometer 100 (insufficient pressure, exhaust instruction) And the like are displayed on the display unit 306.

  In addition, a display of the charging amount (remaining amount) of the charging unit 312, and a display indicating that power generation is being performed when the turbine power generation unit 308 and the photovoltaic power generation unit 311 are generating power, and the charging amount of the charging unit 312. If the value is less than or equal to a predetermined value, control is performed so that a display relating to the state of charge, such as a display indicating that the battery is insufficient, is performed.

  Further, when the charge amount is equal to or less than a predetermined value, an overdischarge prevention process for preventing overdischarge of the charging unit 312 is executed and a power supply OFF process for automatically turning off the power is executed.

4). Next, the air supply / exhaust mechanism and the turbine power generation mechanism in the main body 130 will be described. FIG. 4 is a diagram for explaining the air supply / exhaust mechanism and the turbine power generation mechanism in the main body 130.

  As shown in FIG. 4, the exhaust / exhaust mechanism and turbine power generation mechanism 400 in the main body 130 includes at least a turbine 307, a turbine power generation unit 308, an exhaust valve 309, and an exhaust button 310.

  As shown in FIG. 4, the air sent from the air balloon 140 via the connection portion 136 is guided to the cylindrical turbine 307 via a pipe 401 disposed in the main body portion 130. The pipe 401 is connected in a tangential direction with respect to the peripheral surface of the cylindrical turbine 307 so that the supplied air hits the blades 404 of the turbine rotatably disposed inside the pipe 401. It is configured.

  The air applied to the blades 404 of the turbine rotates the blades 404 of the turbine, and then is sent to the exhaust valve 309 via the piping 402 provided above. Here, in the exhaust valve 309, the pipe 402 is connected to the pipe 403, and the pipe 402 and the pipe 403 are provided with a common exhaust port. The exhaust valve 309 is configured to shield the common exhaust port of the pipe 402 and the pipe 403 when the exhaust button 310 is closed. Thereby, the air sent from the air balloon 140 is sent to the cuff 114 without being discharged to the outside (that is, the air feed path 411 is formed).

  Therefore, when the exhaust button 310 is in the closed state, the pumping operation for the air balloon 140 is repeated, whereby air is sent into the cuff 114, the cuff 114 is pressurized, and the turbine 307 rotates to rotate the turbine power generation unit 308. Will generate electricity. That is, electric power is supplied to the charging unit 312.

  On the other hand, the exhaust valve 309 opens the pipe 402 and the pipe 403 to the outside when the exhaust button 310 is open. As a result, the air in the cuff 114 is exhausted to the outside through the tube 121, the pipe connector 125, the main body connector 131, and the pipe 403 (that is, the first discharge path 412 is formed). ).

  Similarly, when the exhaust button 310 is open, the air sent to the turbine 307 is exhausted to the outside as it is. In other words, a second discharge path 413 is formed for discharging the air sent from the air balloon 140 to the outside via the turbine 307 and the pipe 402.

  With such a configuration, when only the power generation by the turbine power generation unit 308 is desired, the air sent from the air balloon 140 can be sent without opening the cuff 114 by opening the exhaust button 310. It can be used only for power generation by the turbine power generation unit 308.

  It is assumed that the exhaust valve 309 has a latch mechanism (toggle function) linked with an exhaust button that can be latched in an open state and a closed state.

5. State Transition of Electronic Blood Pressure Monitor Next, the state transition of the electronic blood pressure monitor 100 will be described. As described above, the electronic sphygmomanometer 100 according to the present embodiment includes the turbine power generation unit 308 and the photovoltaic power generation unit 311, and is configured to cover the power necessary for blood pressure measurement with the power obtained by the power generation of both power generation units. It has become.

  For this reason, when performing blood pressure measurement, if the amount of charge (remaining amount) of the charging unit 312 is equal to or less than a predetermined value, it is necessary to actively perform power generation processing. Further, even when the user is not performing an operation for blood pressure measurement, when the power generation process is performed, it is necessary to detect this and perform charging automatically.

  Furthermore, in order to prevent overdischarge of the charging unit 312 (secondary battery), when the charging amount (remaining amount) of the charging unit 312 is equal to or less than a predetermined value and power generation processing is not performed, the power is automatically turned on. It is necessary to turn it off. FIG. 5 is a diagram showing state transition of the electronic blood pressure monitor 100 according to the present embodiment corresponding to these cases.

  In FIG. 5, the power OFF state is a state in which the power button 304 is turned OFF and no power is supplied to the control unit 303 or the like (however, both photovoltaic power generation and turbine power generation can be charged). In this state, since the CPU of the control unit 303 is also stopped, the display unit 306 is turned off. However, in the case where photovoltaic power generation is performed, and the charge amount (remaining amount) of the charging unit 312 is equal to or less than a predetermined value at that time, the CPU of the control unit 303 and the display unit 306 are activated. Then, only “battery shortage” is turned on (transition to power supply OFF (photoelectric generation) state). When the amount of charge (remaining amount) of the charging unit 312 exceeds a predetermined value due to photovoltaic power generation, the CPU of the control unit 303 stops and the display unit 306 turns off (returns to the normal power-off state). .

  On the other hand, when the power button 304 is pressed in the power OFF state, the electronic sphygmomanometer 100 shifts to the measuring state. Both photovoltaic power generation and turbine power generation can be charged even during measurement, and when photovoltaic power generation or turbine power generation is performed during measurement, the mark indicating that photovoltaic power generation or turbine power generation is in progress lights To do.

  In the measurement-in-progress state, the control unit 303 confirms the charge amount (remaining amount) of the charging unit 312 and displays it on the display unit 306. Further, as a result of the confirmation by the control unit 303, when it is determined that the amount of charge (remaining amount) of the charging unit 312 is smaller than a predetermined value (for example, the amount of power necessary for one blood pressure measurement is not provided) “Battery shortage” is displayed on the display unit 306.

  When “battery shortage” is displayed on the display unit 306 in the measurement state, the air balloon 140 is operated by the user, and the turbine power generation unit 308 generates power. Alternatively, the photovoltaic power generation unit 311 generates power by moving to a position where it can receive light and receiving the photovoltaic power generation unit 311. Thereby, when the remaining amount of the charging unit 312 becomes larger than a predetermined value, the “battery shortage” display is turned off.

  In addition, in a state where “battery shortage” is displayed, power generation has not been performed for a certain time (that is, the air balloon 140 has not been operated for a certain time and the photovoltaic power generation unit 311 has not received light). In the case), the control unit 303 executes an overdischarge prevention process and also executes a power-off process, and shifts to a power-off state. Alternatively, when the user presses the power button 304 again, the power is turned off.

6). Flow of charge state display process in measurement state Next, the flow of the charge state display process by the control unit 303 in the measurement state will be described with reference to FIGS. 6 and 7. FIG. 6 is a flowchart showing the flow of the charging state display process in the measuring state, and FIG. 7 is a diagram showing the display contents of the display unit 306 in the measuring state.

  When the power button 304 is pressed to shift to the measuring state, the control unit 303 starts the process shown in FIG. In step S601, it is determined whether or not the turbine power generation unit 308 is generating power by rotating the turbine 307 disposed on the air supply path.

  If it is determined in step S601 that the turbine power generation unit 308 is not generating power, the process proceeds to step S603. On the other hand, if it is determined in step S601 that the turbine power generation unit 308 is generating power, the process proceeds to step S602, and a signal indicating that turbine power generation is being performed is received from the power supply control unit 313. When the control unit 303 receives a signal indicating that turbine power generation is being performed, the control unit 303 displays on the display unit 306 that turbine power generation is being performed (see 702 in FIG. 7).

  In step S603, it is determined whether the photovoltaic power generation unit 311 is generating power. If it is determined in step S603 that the photovoltaic power generation unit 311 is not generating power, the process proceeds to step S605. On the other hand, if it is determined in step S603 that the photovoltaic power generation unit 311 is generating power, the process proceeds to step S604, and a signal indicating that photovoltaic power generation is being performed is received from the power supply control unit 313. When the control unit 303 receives a signal indicating that photovoltaic power is being generated, the control unit 303 displays on the display unit 306 that photovoltaic power is being generated (see 701 in FIG. 7).

  In step S605, based on the output from the power supply control unit 313, it is determined whether or not the charge amount (remaining amount) of the charging unit 312 is equal to or less than a predetermined value. If it is determined in step S605 that the remaining amount of the charging unit 312 is not less than or equal to the predetermined value, the process proceeds to step S606, and the charge amount of the charging unit 312 is received from the power supply control unit 313. Upon receiving the charge amount, the control unit 303 displays the display unit 306 according to the charge amount, and then returns to step S601 (see 703 in FIG. 7).

  On the other hand, if it is determined in step S605 that the charge amount (remaining amount) of the charging unit 312 is equal to or less than the predetermined value, the process proceeds to step S607, and a display indicating that the remaining amount of the charging unit 312 is equal to or less than the predetermined value. ("Battery shortage") is performed (see 704 in FIG. 7).

  In step S608, it is determined whether or not the voltage of the charging unit 312 is equal to or lower than a threshold set for preventing overdischarge. If it is determined in step S608 that the voltage of the charging unit 312 is not less than or equal to the threshold set for preventing overdischarge, the process returns to step S601. On the other hand, if it is determined in step S608 that the voltage of the charging unit 312 is equal to or lower than the threshold set for preventing overdischarge, the process proceeds to step S609, and the power OFF process is performed.

7). Flow of Measurement Processing by Control Unit Next, the flow of measurement processing in the control unit 303 will be described. 8A to 8C are flowcharts illustrating the flow of the measurement process in the control unit 303, and FIGS. 9 and 10 are diagrams illustrating the display contents of the display unit 306 during the measurement process.

  When the power button 304 is pressed to shift to the measuring state, the measurement process shown in FIG. 8A is started.

  In step S801, the presence or absence of residual pressure in the cuff unit 110 is determined to prevent pressure measurement errors. Specifically, it is determined whether the pressure value detected based on the output from the pressure sensor 301 is a predetermined value (for example, 30 mmHg) or less, or whether the negative change in the pressure value is a predetermined value or less. To do.

  If it is determined in step S801 that the pressure value is not less than or equal to the predetermined value, or if it is determined that the negative change in pressure value is not less than or equal to the predetermined value, the process proceeds to step S802, and the pulse value / pressure value display area 203 is reached. In addition to displaying the current pressure value, a “exhaust” mark is displayed so that the user opens the exhaust valve 309 to exhaust the remaining air in the cuff 114 (in the message display area 204 of FIG. 9). 902).

  On the other hand, if it is determined in step S801 that the pressure value is equal to or smaller than the predetermined value, or if it is determined that the negative change in the pressure value is equal to or smaller than the predetermined value, the process proceeds to step S803 and the current pressure value is determined. Set to zero. Further, after the pressure value (zero) after calibration is displayed in the pulse value / pressure value display area 203 in step S804, the process proceeds to step S811 in FIG. 8B (see the pulse value / pressure value display area 203 in FIG. 9). .

  In step S811, it is determined whether or not the pumping operation by the user has ended and the increase in pressure value has stopped.

  If it is determined in step S811 that the increase in pressure value has not stopped, it is determined that the user is performing the pumping operation of the air balloon 140.

  If it is determined in step S811 that the increase in pressure value has stopped, it is determined that the pumping operation of the air balloon 140 by the user has ended, and the process proceeds to step S812.

  In step S812, detection of the pulse wave is started based on the pressure signal detected based on the output from the pressure sensor 301, and the detected pulse wave is recorded in association with the cuff pressure. Further, in step S813, extraction of the K sound signal is started based on the signal from the K sound processing unit 302, and is recorded in association with the cuff pressure. It should be noted that the pulse wave detection and the K sound detection were started when the rise in the pressure value stopped, because it was manually pressurized, so it was judged that the pressure reduction process was entered when the pumping operation was completed. Because.

  In step S814, it is determined whether the cuff 114 is insufficiently pressurized. Specifically, the pressure value from the pressure sensor 301 starts to decrease, and the decrease from the pressure value at the start of the decrease reaches 20 mmHg, based on the output from the K sound processing unit 302. It is determined whether or not a sound has been extracted. If it is determined that the K sound has been extracted based on the output from the K sound processing unit 302 before the reduction width reaches 20 mmHg, it is determined that the pressurization is insufficient, and the process proceeds to step S816.

  In step S816, a mark indicating “insufficient pressurization” is displayed in order to notify the user that the pressurization is insufficient (see 901 in the message display area 204 in FIG. 9).

  In step S817, it is determined whether the pressure value of the pressure sensor 301 is a predetermined value (for example, 30 mmHg) or less. If it is determined in step S817 that the pressure value of the pressure sensor 301 is equal to or less than the predetermined value, it is determined that the measurement is stopped, and the measurement process is terminated.

  On the other hand, if it is determined in step S817 that the pressure value of the pressure sensor 301 is greater than the predetermined value, the process proceeds to step S818. In step S818, it is determined whether or not the pumping operation by the user has ended and the increase in pressure value has stopped.

  If it is determined in step S818 that the increase in pressure value has stopped, it is determined that the pumping operation of the air balloon 140 by the user has ended, and the display (901) indicating “underpressurization” is turned off. Return to step S814.

  In step S814, it is determined again whether pressurization is insufficient. In addition, since the method of determining whether or not pressurization is insufficient has already been described, the description is omitted here.

  If it is determined in step S814 that the pressurization is insufficient, the process proceeds to step S816. After notifying the user that the pressurization is insufficient again, the process proceeds to step S817. On the other hand, if it is determined in step S814 that the pressurization is not insufficient, it is determined that the cuff 114 has been pressurized to an appropriate pressure and pressure reduction has started, and the process proceeds to step S831 in FIG. 8C.

  In step S831, it is determined whether or not the minimum blood pressure has been detected. If it is determined that the minimum blood pressure has been detected, the process proceeds to step S832.

  In step S832, it is determined whether the maximum blood pressure has been detected. If it is determined that the maximum blood pressure has been detected, the process proceeds to step S833. In step S833, a mark indicating “exhaust” is displayed in the message display area 204 of the display unit 306 (see 902 in the message display area 204 in FIG. 10).

  Furthermore, in step S834, it is determined whether or not the pressure value of the pressure sensor 301 is equal to or less than a predetermined value (for example, 30 mmHg). The case where the pressure value of the pressure sensor 301 is not less than or equal to a predetermined value is, for example, a case where the user does not open the exhaust button 310 even though blood pressure measurement has ended normally. In this case, a predetermined amount of air remains in the cuff 114. As described above, when the air in the cuff 114 is not completely exhausted, an operation for opening the exhaust button 310 again is necessary at the next blood pressure measurement. In the electronic sphygmomanometer 100, before displaying the measurement result, in step S837, the user is prompted to open the exhaust valve 309 and waits until the pressure value in the cuff 114 becomes a predetermined value or less (message display in FIG. 10). (See 902 in area 204).

  If it is determined in step S834 that the pressure value of the pressure sensor 301 has become equal to or smaller than the predetermined value, the process proceeds to step S835, and the pulse rate is calculated based on the detected pulse wave. In step S836, the systolic blood pressure value and the diastolic blood pressure value are displayed in the systolic blood pressure value display area 201 and the diastolic blood pressure value display area 202, respectively (see 1001 and 1002 in FIG. 10). Further, the pulse value at the time of measuring the maximum blood pressure value and the minimum blood pressure value is displayed in the pulse value / pressure value display area 203 (see 1003 in FIG. 10).

  On the other hand, if it is determined in step S831 that the minimum blood pressure value could not be detected, the process proceeds to step S837 to determine whether or not the pressure value is 40 mmHg or less. If it is determined in step S837 that the pressure value is not 40 mmHg or less, the process returns to step S831.

  On the other hand, if it is determined in step S837 that the pressure value has become 40 mmHg or less, the process proceeds to step S838 to prompt the user to open the exhaust valve 309. In step S839, the pressure value in the cuff 114 becomes 20 mmHg or less. (See 902 in the message display area 204 in FIG. 10).

  If it is determined in step S839 that the pressure value in the cuff 114 has become 20 mmHg or less, or if it is determined in step S832 that the systolic blood pressure has not been detected, the process proceeds to step S840 to indicate that a measurement error has occurred. The user is notified (see 903 in the message display area 204 in FIG. 10).

  As is clear from the above description, in the present embodiment, in the electronic blood pressure monitor 100 that includes the air balloon 140 and the user manually feeds air into the cuff 114, the photovoltaic power generation unit and the turbine power generation unit are provided. The power generation is based on the blowing of air to the cuff 114 by the air balloon 140. This eliminates the need for external power supply to the electronic blood pressure monitor 100.

  The electronic sphygmomanometer 100 according to the present embodiment includes a power supply control unit 313 that monitors the photovoltaic power generation unit and the turbine power generation unit, and can perform charging regardless of whether the measurement is in progress. did. Further, when the charging amount (remaining amount) of the charging unit is not sufficient, this is notified and charging is promoted.

  In addition, the exhaust valve is manually opened and closed, and the passive constant-speed exhaust valve is used to reduce power consumption in blood pressure measurement.

  As a result, it has become possible to provide an electronic sphygmomanometer with high mobility that does not require external power supply.

[Second Embodiment]
In the first embodiment, the blood pressure measurement is performed by the Korotkoff sound method based on the detection of the K sound. However, the present invention is not limited to this. For example, the blood pressure measurement may be performed by the oscillometric method. Good.

  FIG. 11 is a flowchart showing the flow of measurement processing when blood pressure is measured by the oscillometric method, and corresponds to the flowchart of FIG. 8B. The difference from FIG. 8B is that there is no K sound detection start processing after step S813.

DESCRIPTION OF SYMBOLS 100 ... Electronic blood pressure monitor, 110 ... Cuff part, 111 ... Cuff cloth, 112 ... Hook fastener, 113 ... Hook fastener, 114 ... Cuff, 115 ... K sound detection part 120 ... Cuff tube assembly (piping / wiring section), 121 ... Tube, 122 ... Wiring, 123 ... Triple plug, 124 ... Passive constant speed exhaust valve, 125 ... ..Piping connector, 126 ... wiring connector, 127 ... piping connector, 130 ... main body, 131 ... main body connector, 132 ... exhaust button, 133 ... Solar battery cell, 134 ... Display part, 135 ... Power button, 136 ... Connecting part, 140 ... Air balloon, 141 ... Check valve, 142 ... Tail valve, 401 ... Piping, 402 ··Piping

Claims (9)

An electronic sphygmomanometer that measures the blood pressure of a subject,
A cuff attached to the measurement site of the subject;
A main body provided with a control unit that calculates a blood pressure value of the subject based on a pressure value in a decompression process of the cuff part that is attached and pressurized to the measurement site;
An air balloon that pressurizes the cuff part by sending air into the cuff part via the main body part, and
The main body further includes:
A discharge path for discharging the air sent from the cuff part or the air sent from the air balloon in the decompression process of the cuff part to the outside of the main body part, and the air sent from the air balloon to the cuff part An exhaust valve capable of switching the air flow path between the air supply path and the air supply path,
An exhaust button having a mechanism for manually switching the flow path of the exhaust valve;
A turbine power generation unit configured to generate power by rotating a turbine disposed on the air supply path between the air supply bulb and the exhaust valve by air sent from the air supply bulb;
A charging unit for charging the power supplied from the turbine power generation unit to activate the control unit;
When the air in the cuff part is disposed on the discharge path between the exhaust valve and the cuff part and discharges the air in the cuff part so that the pressure in the cuff part is reduced at a constant speed in the pressure reducing process of the cuff part. An electronic sphygmomanometer, further comprising a passive constant-speed exhaust valve whose orifice diameter varies depending on the pressure in the cuff portion.   The electronic sphygmomanometer according to claim 1, wherein the main body portion further includes a photovoltaic power generation unit that generates power by receiving light, and the charging unit further charges electric power supplied from the photovoltaic power generation unit. .   The electronic sphygmomanometer according to claim 2, wherein the main body further includes a power button for instructing activation of the control unit.   If the activation of the control unit is instructed by the power button, and the charging unit cannot supply power necessary for calculating the blood pressure value of the subject, power is insufficient. The electronic sphygmomanometer according to claim 3, wherein a message indicating this is displayed.   When the control unit is instructed by the power button, and the voltage value of the charging unit is equal to or lower than a predetermined threshold, the control unit automatically stops. The electronic blood pressure monitor according to claim 3.   When the power button is instructed to stop the control unit, the charging unit is charging power supplied from the photovoltaic unit, and the charging unit is blood pressure of the subject. The electronic sphygmomanometer according to claim 3, wherein when the power necessary for calculating the value cannot be supplied, the control unit is activated and displays a message indicating that the power is insufficient. .   In the case where the activation of the control unit is instructed by the power button, the control unit determines whether or not the pressure value is a predetermined value or less, and if it is determined that the pressure value is a predetermined value or less, The electronic sphygmomanometer according to claim 3, wherein the pressure value is set to zero.   The control unit starts detection of pulse waves and Korotkoff sounds after the pressure value is set to zero and when the increase in the pressure value stops. The electronic sphygmomanometer described in 1.   When the controller detects the pulse wave and the Korotkoff sound, and the Korotkoff sound is detected before the decrease in the pressure value reaches a predetermined value, the cuff unit The electronic sphygmomanometer according to claim 8, wherein it is determined that the pressurization to the body is insufficient.

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