JP2023118585A - Sphygmomanometer - Google Patents

Abstract

To provide a sphygmomanometer capable of reducing a burden on a patient himself/herself and on surrounding patients caused by sphygmomanometry.SOLUTION: A sphygmomanometer includes: a pump which pressurizes a cuff attached to a patient; and a pump drive control part which has a normal discharge mode for controlling a discharge flow rate of the pump at a normal discharge flow rate, and a low discharge mode for controlling the discharge flow rate of the pump at a lower discharge flow rate than the normal discharge mode, and controls the drive of the pump by selecting which of the normal discharge mode and the low discharge mode is to be adopted for driving the pump based on a measuring time and/or an ambient environment where measurement is performed.SELECTED DRAWING: Figure 5

Description

The present invention relates to a blood pressure measuring device that uses a cuff to measure NIBP (Non-invasive Blood Pressure).

In the measurement of NIBP, a cuff attached to the subject's arm or the like is pressurized by a pump, and the blood pressure value is calculated by detecting the pulse during pressurization or depressurization. For example, when the cuff pressure of the cuff wrapped around the upper arm is increased or decreased, and the amplitude of the pulse wave detected at that time increases relatively significantly (or when the amplitude exceeds a certain percentage of the maximum value) etc.) is determined as the systolic blood pressure (systolic pressure), and the cuff pressure when the amplitude decrease is relatively significant (or when the amplitude falls below a certain percentage of the maximum value, etc.) is taken as the diastolic blood pressure ( diastolic blood pressure). Such NIBP measurement is described, for example, in Patent Document 1 and the like.

In general, a biological information monitor is equipped with a blood pressure measuring device for NIBP measurement.

JP-A-2007-44437

By the way, blood pressure measurement by a blood pressure measuring device mounted on a biological information monitor is sometimes performed day and night according to a patient's condition and a measurement schedule preset in the device. Therefore, depending on the time and place where the measurement is performed, the operating sound may be disturbing to surrounding patients. In addition, since the measurement according to the measurement schedule set in the device may be performed at a time that the patient does not intend, it may be a burden on the patient depending on the time at which the measurement is performed.

In particular, in the pressure-lowering measurement method, in order to measure blood pressure quickly, rapid pressurization with a large pump is demanded, but the operating noise is contrary to this.

However, conventionally, sufficient consideration has not been given to this point.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a blood pressure measurement apparatus that can reduce the burden of blood pressure measurement on the patient himself/herself and surrounding patients.

One aspect of the blood pressure measuring device of the present invention is
a pump that pressurizes the cuff attached to the subject;
a normal discharge mode in which the discharge flow rate of the pump is controlled to a normal discharge flow rate; and a low discharge mode in which the discharge flow rate of the pump is controlled to a discharge flow rate lower than that in the normal discharge mode; a pump drive control unit that drives and controls the pump by selecting which of the discharge mode and the low discharge mode is driven based on the time during which the measurement is performed and/or the ambient environment in which the measurement is performed;
Prepare.

According to the present invention, since the low discharge mode can be selected according to the time and the surrounding environment, it is possible to reduce the burden on the patient and surrounding patients due to blood pressure measurement.

1 is a perspective view showing an external configuration of a biological information monitor (bedside monitor) according to an embodiment Diagram showing the pump unit in the patient monitor Exploded perspective view showing the configuration of the pump unit Block diagram showing the configuration of the vital information monitor Block diagram showing the configuration of the pump unit

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the external configuration of a biological information monitor (bedside monitor) 10 according to this embodiment.

A display unit 101 is provided on the front surface of the biological information monitor 10 . A standby switch 11 and an alarm indicator 12 are provided on the front surface of the biological information monitor 10 .

One side of the biological information monitor 10 is provided with a group of connectors related to measurement of biological information. Specifically, ECG (Electrocardiogram) connector 13a, NIBP (Non-Invasive Blood Pressure) connector 13b, SpO2 connector 13c, and the like are provided. Further, an additional module connecting portion 14 to which an additional module for realizing optional biological information measurement processing can be attached is provided below the connector group. Incidentally, the other side (not shown) of the biological information monitor 10 is provided with a USB connector, a LAN connector, a recorder, and the like.

As shown in FIG. 2 , a pump unit 20 is provided inside the housing of the biological information monitor 10 . The pump unit 20 is connected to the NIBP connector 13b.

FIG. 3 is an exploded perspective view showing the configuration of the pump unit 20. As shown in FIG. The pump unit 20 has first and second pumps 21,22. The first and second pumps 21, 22 are pressure pumps for pressurizing the cuff. The second pump 22 has a higher discharge flow rate than the first pump 21 . The first pump 21 can also be called a small main pump and the second pump 22 can also be called an auxiliary pump.

The first pump 21 is housed within the case 24 . The second pump 22 is fixed by a band 25 to the side surface of the case 24 . The circuit board 23 is housed in the case 24 together with the first pump 21 . Drive circuits for the first and second pumps 21 and 22 are formed on the circuit board 23 . Note that the first pump 21 may be arranged outside the case 24 and the second pump 22 may be arranged inside the case 24 .

FIG. 4 is a block diagram showing the configuration of the biological information monitor 10. As shown in FIG. Via the connector part 110, the biological information monitor 10 has an electrocardiogram electrode 111 for detecting an electrocardiogram, a blood pressure measurement cuff 112 for detecting blood pressure, a body temperature sensor 113 for detecting body temperature, and SpO2. A biological information detector such as a SpO2 sensor 114 for detecting cardiac output and a cardiac output sensor 115 for detecting cardiac output are connected. The connector section 110 functions as an interface between the biological information detection section and the measurement processing section 104 . The connector section 110 includes the ECG connector 13a, the NIBP connector 13b and the SpO2 connector 13c shown in FIG.

The measurement processing unit 104 executes predetermined measurement processing by executing a program stored in the storage unit 105 . By this measurement processing, the measurement processing unit 104 detects the biological information detection unit (electrocardiogram electrode 111, blood pressure measurement cuff 112, body temperature sensor 113, SpO2 sensor 114, and cardiac output sensor 115) connected to the connector unit 110. to measure the patient's biological information. Since conventionally well-known methods can be applied to the measuring method of various kinds of biological information using the biological information detecting section, detailed description thereof will be omitted here.

Further, the measurement processing unit 104 can perform an operation of storing biological information measured in the past in the storage unit 105 and an operation of reading the biological information stored in the storage unit 105 . Furthermore, the biological information obtained by the measurement processing unit 104 is displayed on the display unit 101 via the display control unit 102 in the form of measured values or waveforms.

The display unit 101 is, for example, a liquid crystal display device with a touch panel, and not only has a display function of displaying biometric information, but also has a function as an input unit that receives input operations by a user. Specifically, the display on the display unit 101 by the display control unit 102 and the processing by the measurement processing unit 104 are changed by the user's touch operation on the display unit 101 . Note that in the present embodiment, user operations such as various settings are accepted by touching the display unit 101, but user operations may be accepted using, for example, a keyboard, a mouse, or dedicated buttons. may

The pump unit 20 is connected to the blood pressure measurement cuff 112 via the connector section 110 . In addition, mode information based on user's operation from the display unit 101 is input to the pump unit 20 . Further, the pump unit 20 receives mode information from the central monitor. The mode information includes nighttime mode information, installation location information (for example, hospital ward, operating room), and the like. That is, the biological information monitor 10 can set the night mode and installation location for blood pressure measurement.

FIG. 5 is a block diagram showing the configuration of the pump unit 20. As shown in FIG. A first pump 21 , a second pump 22 , a flow control valve 34 , a quick exhaust valve 36 and a pressure sensor 37 are connected to the flow path connecting the NIBP connector 13 b and the cuff 112 .

The first pump 21 is driven by a pump drive circuit 31 and the second pump 22 is driven by a pump drive circuit 32 . The flow control valve 34 is driven by a flow control valve drive circuit 33 and the quick exhaust valve 36 is driven by a quick exhaust valve drive circuit 35 . The pressure detected by the pressure sensor 37 is input to a CPU (Central Processing Unit) 40 via an analog-to-digital conversion circuit (ADC) 38 .

In the case of this embodiment, the first pump 21 has a discharge flow rate of 1.8 L/min and is a duty control type pump. The second pump 22 has a discharge flow rate of 4.0 L/min and is an ON/OFF control type pump.

The CPU 40 controls the pump drive circuits 31 and 32 , the flow control valve drive circuit 33 and the quick exhaust valve drive circuit 35 . The CPU 40 receives mode information based on the user's operation from the display unit 101 or from the central monitor, and the CPU 40 controls the pump driving circuits 31 and 32 based on this mode information.

A specific description will be given. When the mode information indicates the night mode, the CPU 40 puts the first pump 21 into an ON-operable state and the second pump 22 into an ON-operable state. On the other hand, when the mode information indicates that the night mode is not set, the CPU 40 puts both the first pump 21 and the second pump 22 into a state in which they can be turned on.

Thus, the pump unit 20 suppresses the discharge flow rate of the entire pump during the nighttime mode. As a result, the operating noise of the pump during blood pressure measurement at night is reduced, so that the burden of the operating noise on surrounding patients can be reduced. In addition, since the cuff is gently pressurized, it is possible to reduce the probability that the patient will wake up when blood pressure measurement is started while the patient is asleep, thereby reducing the burden on the patient.

As described above, according to the present embodiment, the pumps 21 and 22 for pressurizing the cuff 112 worn by the subject and the discharge flow rate of the pumps 21 and 22 in the night mode are compared with those in other than the night mode. By providing a pump drive control unit (CPU 40, pump drive circuits 31 and 32) that drives and controls the pumps 21 and 22 so as to suppress the noise, the burden on the surroundings due to the operation noise can be reduced.

The above-described embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention should not be construed to be limited by these. Thus, the invention may be embodied in various forms without departing from its spirit or essential characteristics.

In the above embodiment, the two pumps 21 and 22 are provided, and the pump 22 having a large discharge flow rate is turned off during the nighttime mode, but the present invention is not limited to this. For example, when one pump is provided, the same effect as the above-described embodiment can be obtained by controlling the discharge flow rate of this one pump in night mode to be lower than in other modes than in night mode.

In the above-described embodiment, the case where the pump drive control section (CPU 40, pump drive circuits 31 and 32) reduces the discharge flow rate of the pump during the nighttime mode has been described, but the present invention is not limited to this, and the pump drive control section has a normal discharge mode in which the discharge flow rate of the pump is controlled to a normal discharge flow rate, and a low discharge mode in which the discharge flow rate of the pump is controlled to a discharge flow rate lower than that in the normal discharge mode, and the pump is operated in the normal discharge mode and the low discharge mode. Which of the low discharge modes should be driven may be selected based on the time during which the measurement is performed and the ambient environment in which the measurement is performed, and the pump may be driven and controlled. The above embodiment corresponds to the case where the pump drive control section selects the low discharge mode during the nighttime mode.

The pump drive control section may select the low discharge mode not only when the low discharge mode is selected during the nighttime mode, but also when the ambient light is equal to or less than a predetermined threshold. That is, an optical sensor that detects the amount of ambient light of the apparatus may be provided, and the low ejection mode may be selected when the detected amount of light is equal to or less than a predetermined threshold.

Further, the pump drive control section may select the low discharge mode when the ambient sound is equal to or less than a predetermined threshold. That is, a sound volume sensor that detects the sound volume around the apparatus may be provided, and the low ejection mode may be selected when the detected sound volume is equal to or less than a predetermined threshold. In this way, the pump sound is reduced in a quiet environment such as when the patient is asleep, so that it is possible to prevent disturbing the patient's sleep.

Furthermore, when applied to a biological information monitor or a blood pressure measuring device having both a pressurization measurement mode for measuring blood pressure during the cuff pressurization process and a blood pressure drop measurement mode for measuring blood pressure during the cuff depressurization process, pump drive control is required. When the department selects the low ejection mode, the measurement may be performed in the boost measurement mode. By doing so, the operation noise of the pump during the boost measurement is reduced, and as a result, it is possible to reduce the amount of noise mixed in with the measured values due to the pump in the boost measurement mode. can improve the reliability of measurements in

In the above-described embodiments, the case where the present invention is applied to a biological information monitor has been described, but the present invention is not limited to biological information monitors, and is widely applied to blood pressure measurement devices and medical equipment equipped with blood pressure measurement devices. It is possible.

The present invention is suitable for, for example, biological information monitors.

REFERENCE SIGNS LIST 10 biological information monitor 20 pump unit 21 first pump 22 second pump 31, 32 pump drive circuit 40 CPU
101 display unit 102 display control unit 103 alarm indicator 104 measurement processing unit 105 storage unit 110 connector unit 112 cuff

Claims (8)

a pump that pressurizes the cuff attached to the subject;
a normal discharge mode in which the discharge flow rate of the pump is controlled to a normal discharge flow rate; and a low discharge mode in which the discharge flow rate of the pump is controlled to a discharge flow rate lower than that in the normal discharge mode; a pump drive control unit that drives and controls the pump by selecting which of the discharge mode and the low discharge mode is driven based on the time during which the measurement is performed and/or the ambient environment in which the measurement is performed;
Blood pressure measuring device. The blood pressure measurement device is capable of setting a night mode,
The pump drive control unit selects the low discharge mode when the night mode is set.
The blood pressure measuring device according to claim 1. The pump drive control unit selects the low discharge mode when ambient light is below a predetermined threshold.
The blood pressure measuring device according to claim 1. The pump drive control unit selects the low discharge mode when ambient sound is equal to or less than a predetermined threshold.
The blood pressure measuring device according to claim 1. The pump has a first pump and a second pump having a larger discharge flow rate than the first pump,
The pump drive control unit puts the first pump in an ON-operable state and the second pump in an ON-operable state in the low discharge mode,
The blood pressure measuring device according to any one of claims 1 to 4. In the low discharge mode, measurement is performed in a boost measurement mode,
The blood pressure measuring device according to any one of claims 1 to 5. A blood pressure measuring device according to any one of claims 1 to 6,
vital information monitor. The biological information monitor is a bedside monitor, and a central monitor notifies a command to switch to the low discharge mode.
The vital information monitor according to claim 7.

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