JP2002165765A - Electronic sphygmomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic sphygmomanometer whose pressure sound doesn't wake a subject and other people who are asleep while blood pressure of a sleeping subject is being measured. SOLUTION: Judging whether or not the present time has reached the specified measurement time of blood pressure (ST1) and judging whether or not the specified time indicates a nocturn area for slowly adding pressure (ST2), the pressure sound is lowered by slowly adding pressure than usual (ST6) when the time indicates an area for the pressure to be slowly added.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic sphygmomanometer.

[0002]

2. Description of the Related Art In a well-known electronic sphygmomanometer, a cuff is attached to a measurement site (upper arm, wrist, neck, etc.), and the blood vessel is compressed by pressurizing the cuff with a pressurizing means such as a pressurizing pump. ,
Blocks blood flow, detects pulse wave signals and K sound signals in the subsequent decompression process or the first pressurization process, and performs the decompression process.
Alternatively, the cuff pressure during the pressurization process is detected, and the systolic blood pressure and the diastolic blood pressure are determined from the cuff pressure and blood vessel information such as a pulse wave signal and a K sound signal, and are displayed on a display.

[0003] Further, as a form of use of the electronic sphygmomanometer, there is a type in which a cuff is attached to a subject in advance at night or while sleeping, and the blood pressure while sleeping is measured.

[0004]

In the conventional electronic sphygmomanometer described above, in particular, in a system in which a pressure is applied before measurement, a rapid pressurization is performed, and a pressurizing pump is driven by a large driving power. It often makes pressure noise. for that reason,
When the measurement is started, the sleeping subject awakes, and there is a problem that the blood pressure cannot be measured while sleeping.
In addition, when surrounding children and other people are sleeping, there is also a problem that a pressurized sound prevents these people from sleeping well.

[0005] The present invention has been made in view of the above problems, and even if the subject measures blood pressure while sleeping,
It is an object of the present invention to provide an electronic sphygmomanometer that does not wake up a subject or another sleeping person around by a pressurized sound.

[0006]

According to the electronic blood pressure monitor of the present invention, a cuff is locally attached, a cuff is pressurized by a pressurizing means, a blood vessel is blocked, and then the pressure is reduced or the pressure is increased. In determining blood pressure, the apparatus includes: a silent determination unit that determines whether the surroundings are in a silent state; and a unit that reduces a pressurized sound of the pressurizing unit when pressurizing blood pressure measurement at the time of the silent determination. ing.

In this electronic sphygmomanometer, if the surroundings are determined to be quiet by the silent determining means, the pressurizing sound of the pressurizing means during blood pressure measurement is reduced. Therefore, the subject or another person while sleeping does not wake up due to the pressurized sound.

In the present invention, the silent determination means includes means for determining that a silent state has occurred according to the time, and means for determining that night has been reached, that is, a silent state, based on ambient brightness. And means for determining a quiet sound based on the presence or absence of ambient noise.

In the electronic blood pressure monitor of the present invention, a cuff is attached to a local area, the cuff is pressurized by pressurizing means, blood vessels are blocked, and the blood pressure is reduced in the subsequent decompression process or in the pressurization process.
In those measuring blood pressure, equipped with a low-speed pressurization mode,
When measuring the blood pressure in the low-speed pressurization mode, the pressurization is delayed.

In this electronic sphygmomanometer, if the subject is set to the low-speed pressurizing mode before going to bed, the pressurizing sound by the pressurizing means is small since the pressurizing is performed at a low speed even at the start of the measurement while sleeping. The subject does not wake up.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments. FIG. 1 is a block diagram showing a configuration of an electronic sphygmomanometer according to one embodiment of the present invention.
The electronic sphygmomanometer according to this embodiment includes a main body 1 and a cuff 2, and the main body 1 includes a pressurizing pump 3 and an exhaust control valve 4.
, A pressure sensor 5, an A / D converter 6, a CPU 7,
A key input unit 8, a memory 9, a power supply 10, a drive voltage control unit 11, and a display 12 are provided. The pressure pump 3, the exhaust control valve 4, the pressure sensor 5, the cuff 2,
Are connected by an air passage 13. Here, the cuff 2 is assumed to be worn on the wrist and of a body-integrated type, but may be used for an upper arm or a finger.

The CPU 7 has a built-in ROM for storing a program for executing a process for measuring a sphygmomanometer, and executes a blood pressure measurement process according to the program. The measurement process itself may be the same as the conventional well-known sphygmomanometer process. For example, when the start switch is turned on with the cuff 2 attached to the measurement site, the pressurizing pump 3 starts pressurizing. Then, the pressure of the cuff 2 is increased to pressurize the cuff 2 to a predetermined value. Thereafter, the exhaust control valve 4 shifts to slow exhaust (decompression), and during the decompression process, the pressure sensor 5 and the A / D converter 6
Thus, a predetermined algorithm is applied to the detected cuff pressure and pulse wave signal to determine the systolic blood pressure and the diastolic blood pressure, and the measured values are displayed on the display 12. This series of processes is a general process and is not a feature of this embodiment. The key input unit 8 includes a power switch, a start switch, a pressure switch, and the like. In some embodiments, the key input unit 8 also includes a mode switch described later.

The electronic sphygmomanometer according to this embodiment has a function of setting and storing a measurement time in advance, and starts measuring when the set time comes. The drive voltage controller 11 has a function of selectively driving the pressurizing pump 3 with a large drive power and a small drive power. At the measurement time at night, the pressure is slowly increased with a small driving power, and at the measurement time other than nighttime (daytime), the pressure is driven with the normal large driving power.

As a specific example, the set time is set to a normal pressurization area, AM 5:00, AM 11:00, PM 5: 0.
0 and PM 11:00, and AM 1:00 and AM 3:00 are set as slow pressure areas.
The measurement time is set by pressing the measurement time key 21 shown in FIG. 2 and touching the pressure key 22 each time the time display is incremented. When the measurement time key 21 is reset, the display time is changed to the measurement time. Is set as the measurement time key 21 again.
By pressing and operating the pressure key 22, the measurement time is sequentially set.

Next, daytime and nighttime processing operations of the electronic blood pressure monitor of this embodiment will be described with reference to a flowchart shown in FIG. While the power is on, it is determined whether or not the set time has been reached at each sample time. When the set time has been reached (step ST1), it is determined whether or not it is in a slowly pressurized region indicating night (step ST2). . The preset measurement time is not a slow pressurization area indicating night, but a normal pressurization area, that is, AM5: 00, AM1 in the above setting example.
If the time is any of 1:00, 5:00, and 11:00 PM, an alarm is sounded to notify the user of the measurement and the display power is turned on (step ST).
3). Next, when the start switch is turned on (step ST4), normal pressurization with a normal drive voltage is started (step ST5), and blood pressure measurement is performed (step ST7).

In step ST2, when the time is in the slowly pressurized region indicating night, that is, in the above setting example, A
If the time is either M1: 00 or 3:00,
A drive power smaller than the normal drive power is supplied to the pressurizing pump 3 to perform slow pressurization (step ST6).
After the pressure is increased to the predetermined value, the process proceeds to the decompression process, and the process proceeds to blood pressure measurement (step ST7).

In the above embodiment, the slow pressurization by applying a small driving power from the drive control unit 11 to the pressurizing pump 3 is performed as shown in FIG. May be shortened as shown in FIG. 4B. When this method is adopted, the process of step ST6 in FIG. 3 drives the pump by lowering the effective value of the PWM control, that is, the ON time ratio, as shown in FIG. 5 (step ST11). Thereafter, it is determined whether or not the cuff pressure has reached the pressurization target value (step ST12). When the cuff pressure has reached the pressurization target value, the pump is turned off (step ST13),
The decompression process starts.

As another example of the slow pressurization by applying a small driving power to the pressurizing pump 3 in the above embodiment, a driving voltage is applied to the pressurizing pump 3 via a diode 31, as shown in FIG. Normally, the diode 31 is short-circuited by the relay contact 32, a large driving voltage is applied to the pressurizing pump 3, and the relay contact 32 is turned off at the time of the slow pressurizing region at night. West,
A drive voltage lower than usual may be applied to the pressure pump 3. When this method is adopted, step S in FIG.
In the process of T6, as shown in FIG. 7, first, the drive voltage of the pressurizing pump 3 is switched to low (step ST21). Thereafter, it is determined whether or not the cuff pressure has reached the target pressurization value (step ST22).
F (step ST33), and the pressure reduction process, that is, the measurement process is started.

In the above embodiment, the measurement time can be set,
In addition, the time range during the night can be set. However, as another embodiment, a clock and an interval measuring mechanism are internally provided, and measurement is performed at a predetermined time interval. , It may be determined whether or not the current time is in the slowly pressurized area at night from that time, and the duty of the drive voltage may be reduced or the drive voltage may be reduced at the time of the slowly pressurized area at night. The measurement interval is provided with a measurement interval key 24 as shown in FIG.
Each time the pressure key 22 is touched while the measurement interval key 24 is pressed, the time value is changed, and when the measurement interval key 24 is reset, the displayed time value may be set as the measurement interval.

As another embodiment, as shown in FIG. 9, a sensor 25 for detecting the surrounding brightness is provided, and the brightness sensor is used to determine slowly whether or not the area is under pressure. Is also good.

Further, as another embodiment of the electronic sphygmomanometer, as shown in FIG. 10, a switch 26 for setting a normal pressurizing mode and a low-speed (slow) pressurizing mode is provided. When the low-speed pressurization mode is selected, pressurization is delayed. In actual use, the subject is put into the low-speed pressurizing mode when the subject goes to bed. Also in this embodiment, the slow pressurization in the low-speed pressurization mode is performed by the method of lowering the duty and the method of lowering the drive voltage described with reference to FIGS.

In the electronic sphygmomanometer of this embodiment, when the low-speed pressurizing mode is set, the low-speed pressurization is started by operating the start switch, and the measurement is started. As described above, in addition to the normal pressurizing mode and the low-speed pressurizing mode, a timer setting mode is provided, and a predetermined time is set in the timer setting mode, and after the start switch is turned on, the time set by the timer elapses. The measurement process may be started later.

The processing operation of the electronic sphygmomanometer according to this embodiment will be described with reference to the flowchart shown in FIG. Power is ON
When the start switch is turned on in the state in which the operation is performed (step ST31), it is determined whether or not the elapsed time from that point has reached the set timer time, that is, whether or not the time is up (step ST32). If the time is up, it is determined whether or not the low-pressure mode is set (step ST3).
3). If the normal pressurization is set by the switch 26, the normal pressurization is started (step ST34), and the blood pressure measurement is started (step ST35). If low-speed pressurization is set by the switch 26, low-speed pressurization, that is, pressurization slower than usual is performed (step ST35), and blood pressure measurement processing is started (step ST36).

In this embodiment, after going to bed,
This is effective when measuring blood pressure while sleeping. In addition to the normal pressurizing mode and the low-speed pressurizing mode, a time setting mode may be provided as shown in FIG. 13 so that the measurement time can be set in this mode.

In another embodiment, as shown in a time / cuff pressure characteristic shown in FIG. 14, normally, the pressure is rapidly increased as shown by a characteristic a, and in the case of low-speed compression, the pressure is slowly increased as shown by a characteristic b. Thus, the decompression speed may be made faster than usual so that the time from the start of pressurization to the end of blood pressure measurement in the normal pressurization mode and the low-speed pressurization mode is almost the same. According to the electronic blood pressure monitor of this embodiment, the pressurizing sound can be reduced by slow pressurization, and the entire measurement time is not substantially changed, so that the influence of the long measurement time such as rolling over is reduced. it can.

Further, in the electronic blood pressure monitor of the above embodiment, in both the normal pressurization mode and the low-speed pressurization mode, it is assumed that the pressure is increased to a predetermined target value and the blood pressure measurement process is performed in the subsequent pressure reduction process. As another embodiment, as shown in FIG. 15, in the normal pressurization mode, the blood pressure measurement process is performed in the depressurization process after the rapid pressurization. A blood pressure measurement process may be performed.

The processing operation of the electronic sphygmomanometer according to this embodiment will be described with reference to the flowchart shown in FIG. Power supply is O
When the start switch is turned on in the state of N (step ST41), it is determined whether or not the elapsed time from that point has reached a predetermined time, that is, whether or not the timer has expired (step ST42). If the time is up, it is determined whether or not the mode is the low-speed pressurizing mode (step ST43). If the normal pressurization mode is set by the switch 24, normal pressurization by rapid pressurization is performed (Step S
T44), a blood pressure measurement process is performed in the next slow pressure reduction process (step ST45).

If the low-speed pressurizing mode is set by the switch 24, pressurization is performed more slowly than during normal pressurization, and a blood pressure measurement process is also performed during this pressurization process (step ST46).

According to the electronic sphygmomanometer of this embodiment, since the pressure is slowly applied at the time of pressurization, the pressurization sound can be reduced. Since the blood pressure measurement process is performed during this pressurization process, the maximum pressurized value can be minimized.

In each of the embodiments described above, the case where pressure is applied slowly at night is described. However, according to the present invention, application of pressure slowly is not limited to nighttime and the surroundings are quiet, and the subject and the subject can be quietly pressed. It may be the time when another person is sleeping. Therefore, ambient noise may be detected by a sound sensor or the like, and the pressure may be increased slowly in a silent state.

[0031]

According to the present invention, since the pressurized sound generated by the pressurizing means is reduced when the surroundings are quiet, the subject does not wake up even if he or she measures blood pressure during sleep. You can measure your blood pressure. In addition, it does not prevent other people from sleeping while sleeping.

Further, according to the present invention, a low-speed pressurizing mode is provided. In this low-speed pressurizing mode, pressurizing is performed slowly, so that pressurizing noise can be reduced. Therefore, since the subject does not wake up even if the blood pressure is measured during sleep, the blood pressure during sleep can be measured. Also, it does not prevent other people from sleeping while sleeping.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an electronic sphygmomanometer according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an upper surface of a main body of the electronic sphygmomanometer according to the embodiment.

FIG. 3 is a flowchart illustrating pressurization processing of the electronic blood pressure monitor of the embodiment.

FIG. 4 is an explanatory diagram in a case where the pressurizing speed is changed by changing the duty of the drive voltage of the pressurizing pump.

FIG. 5 is a flowchart illustrating the slow pressurizing process of FIG. 3 by the duty control.

FIG. 6 is an explanatory diagram in a case where a pressurizing speed is changed by changing a drive voltage value of a pressurizing pump.

FIG. 7 is a flowchart illustrating the slow pressurization process of FIG. 3 by the same drive voltage value control.

FIG. 8 is a diagram showing an upper surface of a main body of an electronic blood pressure monitor according to another embodiment of the present invention.

FIG. 9 is a diagram showing an upper surface of a main body of an electronic sphygmomanometer according to still another embodiment of the present invention.

FIG. 10 is a diagram showing an upper surface of a main body of an electronic sphygmomanometer according to still another embodiment of the present invention.

FIG. 11 is a diagram showing an upper surface of a main body of an electronic sphygmomanometer according to still another embodiment of the present invention.

FIG. 12 is a flowchart for explaining pressurization processing of the electronic blood pressure monitor of the embodiment.

FIG. 13 is a flowchart illustrating pressurization processing of an electronic blood pressure monitor according to still another embodiment of the present invention.

FIG. 14 is a diagram showing time-cuff pressure change characteristics of an electronic blood pressure monitor according to still another embodiment of the present invention.

FIG. 15 is a diagram showing a time-cuff pressure change characteristic of an electronic blood pressure monitor according to still another embodiment of the present invention.

FIG. 16 is a flowchart illustrating pressurization processing of the electronic sphygmomanometer according to the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body part 2 Cuff 3 Pressure pump 4 Exhaust control valve 5 Pressure sensor 6 A / D converter 7 CPU 8 Key input part 9 Memory 10 Power supply 11 Drive voltage control part 12 Display

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsutomu Teramoto 801 Minamifudo-cho, Higashi-iri, Horikawa, Shiokoji-dori, Shimogyo-ku, Kyoto Inside (72) Inventor Norihito Yamamoto Norihito Yamamoto, Shiokyo-dori, Shimogyo-ku, Kyoto-shi 801 Higashiiri Minami Fudodoucho OMRON Life Science Research Laboratories F-term (reference) 4C017 AA08 AB01 AC01 AD01 AD07 DD14 DE01 FF08

Claims (14)

[Claims] 1. An electronic sphygmomanometer for attaching a cuff to a local area, pressurizing the cuff by a pressurizing means to block blood vessels, and determining blood pressure in the subsequent decompression process or the pressurization process. An electronic sphygmomanometer, comprising: a silent determination unit that determines whether the device is in a silent state; and a unit that reduces a pressurized sound of the pressurizing unit when the blood pressure is measured during the silent determination. 2. An electronic sphygmomanometer according to claim 1, wherein said silent sound judging means judges the silence based on time. 3. The electronic sphygmomanometer according to claim 1, wherein said silent sound judging means judges the silence based on the brightness of the surroundings. 4. The electronic sphygmomanometer according to claim 1, wherein said silent sound judging means judges the silent sound based on surrounding sounds. 5. The pressurizing means is a pump, and the pressurizing sound of the pressurizing pump is reduced by slowing down pressurizing of the pressurizing pump. Item 4. The electronic sphygmomanometer according to item 4. 6. The method of slowing down the pressurization of the pressurizing pump,
6. The electronic sphygmomanometer according to claim 5, wherein the control is performed by reducing the ON time ratio of the PWM control of the drive voltage of the pressurizing pump. 7. The method of slowing down the pressurization of the pressurizing pump,
6. The electronic sphygmomanometer according to claim 5, wherein the driving is performed by lowering a driving voltage of the pressurizing pump. 8. The electronic sphygmomanometer according to claim 1, wherein the measurement time can be set arbitrarily. 8. The electronic sphygmomanometer according to claim 1, 2, 3, 4, 5, 6, or 7. 9. An electronic sphygmomanometer for attaching a cuff to a local area, pressurizing the cuff by a pressurizing means to block blood vessels, and measuring blood pressure during the subsequent decompression process or the pressurization process. An electronic sphygmomanometer having a pressurization mode, wherein pressurization is slowed down when measuring blood pressure in the low-speed pressurization mode. 10. The electronic sphygmomanometer according to claim 9, wherein the measurement is started after a lapse of a predetermined time after the measurement start switch is turned on. 11. The electronic sphygmomanometer according to claim 9, wherein the measurement is started after a predetermined time elapses after the measurement start switch is turned on, and the time from the switch ON to the start of the measurement can be arbitrarily set. 12. The electronic sphygmomanometer according to claim 9, wherein the measurement is started at a predetermined time after the measurement start switch is turned on. 13. The method according to claim 5, wherein after increasing the pressure to a predetermined pressure, the pumping speed at the time of measurement is increased. The electronic sphygmomanometer according to claim 9, 10, 10, 11, or 12. 14. The method according to claim 4, wherein when the pressurization is delayed, the measurement is performed during the pressurization. 10, Claim 11
Or the electronic sphygmomanometer according to claim 12.