JPS61185249A - Electronic hemomanometer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an electronic blood pressure monitor that employs a cuff compression method using manual pressure.

(B) Summary of the Invention The present invention is an electronic blood pressure needle that displays the maximum pressure value, thereby making it possible to predict the target value for re-pressurization in the event of insufficient pressure.

(c) Conventional technology In general, an electronic blood pressure monitor involves wrapping a cuff around the upper arm, applying pressure with a pressure means such as a rubber bulb to increase cuff pressure, stopping blood flow, and then evacuating the cuff at a very low rate. Systolic blood pressure and diastolic blood pressure are determined from the generation and disappearance of Korotkoff sounds obtained during the exhaustion process and cuff pressure data, or from pulse wave data and cuff pressure data. This type of electronic blood pressure monitor detects insufficient pressure during the process of reducing cuff pressure, and if insufficient pressure is detected, a re-inflation instruction is displayed to prompt re-inflation. be. A specific example of insufficient pressurization detection is Example X. In the case of the Korotkoff sound method, determination is made based on whether Korotkoff sounds are obtained within a predetermined time after entering slow exhaust.

(d) Problems to be solved by the invention When the above-mentioned conventional electronic blood pressure monitor detects insufficient pressurization and displays a message to that effect, the measurer moves on to re-pressurize, but the previous pressurization has reached the maximum level. Because it is difficult to confirm how far the pressure has been applied before moving to the exhaust, insufficient pressure may be detected again even after re-pressurization, requiring re-pressurization, or conversely, over-pressurization results in wasted measurement time. However, there was a problem in that the person being measured was forced to suffer.

In view of the above, an object of the present invention is to provide an electronic blood pressure monitor that can perform appropriate pressurization.

(e) Means and operation for solving the problems The electronic blood pressure monitor of the present invention, as shown schematically in FIG. A measurement data detection unit 3 that detects data for determining blood pressure including cuff pressure during the cuff pressurization/decompression process, a blood pressure determination means 4 that determines blood pressure based on this measurement data, and displays the determined blood pressure value. cuff pressure maximum value storage means 6 for detecting and storing the maximum value of cuff pressure, and maximum pressure value display means 7 for displaying this maximum cuff pressure value.

In this electronic blood pressure monitor, during the cuff pressurization/depressurization process by the pneumatic system, the maximum value of the cuff pressure is updated and stored in the maximum value storage means and displayed on the pressurization maximum value display means.

(f) Examples The present invention will now be explained in more detail with reference to Examples.

FIG. 2 is a block diagram showing the circuit configuration of an electronic blood pressure monitor in which the present invention is implemented. In the figure, the cuff 11 is
A rubber tube 12 communicates with a pressurizing rubber bulb 13, an exhaust valve 14, and a pressure sensor 15. Air pressure inside the cuff 11 (
cuff pressure) is converted into an electrical signal by the pressure sensor 15,
Furthermore, it is converted into a digital signal by the A/D converter 16,
It is designed to be taken into the microcomputer 17. Also, the cuff 11 has a sound (Korotkoff sound) sensor 18.
A signal detected by the sound sensor 18 is connected to the sound sensor 18, and is also input to the microcomputer 17 through an amplifier 19 and a filter 20. Note that 21 is a display that displays the current cuff pressure, the maximum value of the pressurized cuff pressure, the determined systolic blood pressure, diastolic blood pressure, etc., and 22 is a buzzer for notification.

The microcomputer 17 has a built-in memory (R
A series of processing operations for blood pressure measurement are executed according to a program stored in the OM).

Next, the operation of the electronic blood pressure monitor of the above embodiment will be explained with reference to the flowchart shown in FIG.

When the power is turned on and operation starts, initialization such as resetting memory registers and flags is performed [step ST (hereinafter abbreviated as ST) 1], and at this point the display 21 shows the state shown in FIG. 4(a). As shown, 9 marks indicating that measurement is possible and 0 indicating that the current cuff pressure is 0 are displayed. Subsequently, at Sr1, it is determined whether or not pressurization is being performed, that is, whether or not the cuff pressure is increasing. If pressurization is not performed, this step waits for a while, but when pressurization is performed, the current pressure pc+II) is displayed on the display 21 for each sampling with Sr3, and the current cuff pressure pCinl and the previous time are displayed with Sr1. The cuff pressures pc-1, are compared. At the time of first sampling, the previous cuff pressure was O, so the current cuff pressure pC
(11 is stored as the maximum value and displayed on the left side of the display 21 (Sr5). Then, at Sr6 it is determined whether or not pressurization has stopped, but while pressurizing with the rubber ball 13, this determination is No
, returns to Sr1, and returns Sr1 at each sampling time.
The processes from T2 to ST6 are repeated. That is, the current cuff pressure pCtel read at each sampling time and the maximum value up to that point are displayed on the display 21. and,
During pressurization, for example, as shown in FIG. 4(b), the indicator 2
The current pressure is displayed on the cloth section 1, and the maximum value is displayed on the left.

When the pressurization is stopped, that is, when the exhaustion moves to a slow speed, and the determination at Sr6 becomes YES, it is subsequently determined whether or not insufficient pressurization has been detected (Sr1). When the pressurization is stopped, that is, when the measurement is started, the display shows that the maximum value is 15, for example, as shown in Figure 4 (C).
Assuming 2a+ml (g, current value is 145+*m) Ig, updating of the maximum value display stops at this point, and the current pressure display on the right side decreases with slow exhaustion.

If insufficient pressurization is detected in Sr1, then move to Sr1,
A pressurization instruction is displayed. This pressurization instruction display is performed by displaying an upward arrow in the center of the display 21, as shown in FIG. 4(d).

Seeing this upward arrow display, the measurer knew that the previous pressurization was insufficient, and when he saw the maximum value displayed on the left side of the display 21, it was confirmed that the pressure had been increased to 152 mmHg. You can know something.

The measurer who knew that the pressure was insufficient used the rubber ball 13 to tighten the cuff 11.
When Sr2 is pressurized again, the determination of Sr2 becomes YES, and the processes of Sr2 to Sr6 are repeated again, and the current cuff pressure display and maximum value display are updated every sampling time.

Naturally, the maximum value display will be higher than before repressurization, for example,
The display will be as shown in Figure (e). For example, 184mm
Suppose that the pressurization is stopped after the pressurization is re-applied to l(g).When the pressurization is stopped, that is, when the measurement starts, the current pressure display decreases while the maximum value display is maintained at 184 wmHg. If no sound is detected after more than a certain amount of time has elapsed, it is determined that insufficient pressurization has been detected (Sr1).
, From now on, the systolic blood pressure will be determined by K sound detection.
O) As shown in Figure 4 (g), the maximum pressure value that had been displayed on the left side of the display 21 should be erased. High blood pressure is the fourth
Display as shown in Figure (g>) (STII).

In the process of further pressure reduction, the disappearance of the sound is detected, and the cuff pressure at that point is determined as the diastolic blood pressure (ST12), and the diastolic blood pressure is displayed on the right side of the display 21.
It is displayed instead of the current pressure (ST13). After that, 5T
At step 14, measurement completion processing such as displaying a downward arrow exhaust symbol is performed, and the operation is completed.

In the above embodiment, in the measurement processing after ST9, an example was given in which the injection was used to detect the occurrence and disappearance of the K sound and determine the systolic blood pressure and diastolic blood pressure. The processing itself may be performed using other methods, such as a pulsation method in which the pulse wave component superimposed on the cuff pressure is separated and the blood pressure is determined from the envelope of the pulse width value. In this case, a sound sensor, its amplifier, etc. are not required.

In addition, in the above embodiment, the maximum pressure value is displayed on the left side of the display until the systolic blood pressure is determined, but at the time when the pressure instruction is displayed, insufficient pressurization occurs on the left side of the display. The previous maximum pressurization value may be displayed.

Furthermore, in the above embodiment, there is one display 21, and until the systolic blood pressure is determined, the maximum pressurization value is displayed on the left part and the current pressure is displayed on the cloth part, but there are two displays. A display device may be provided to display the maximum pressurization value and the current pressure separately.

(G) Effects of the Invention According to this invention, the maximum pressurized value is displayed, so when repressurizing when insufficient pressurization is detected or when repressurizing when remeasuring, Using the maximum pressurization value as a guide, it is possible to determine what level of pressurization the next value should be, thereby further preventing insufficient pressurization or conversely excessive pressurization.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of the present invention, and FIG.
The figure is a circuit block diagram of an electronic blood pressure monitor in which the present invention is implemented, FIG. 3 is a flow diagram for explaining the operation of the electronic blood pressure monitor, and FIG.
t(f) (gl is a diagram showing a display example for explaining the operation of the electronic blood pressure monitor. 1: Cuff, 2: Pneumatic system, 3: Measurement data detection unit, 4: Blood pressure determination means, 5 : display means,
6: Maximum value storage means; 7: Pressure maximum value display means.

Claims (3)

[Claims] (1) A cuff, a pneumatic system that pressurizes and depressurizes the cuff, a measurement data detection unit that detects data for determining blood pressure including cuff pressure during the cuff pressurization and depressurization process, and a measurement data detection unit that detects data for determining blood pressure including cuff pressure during the cuff pressurization and depressurization process, and An electronic sphygmomanometer comprising a blood pressure determining means for determining the blood pressure based on the blood pressure, and a display means for displaying the determined blood pressure value, the cuff pressure maximum value storage means for detecting and storing the maximum pressurized value of the cuff pressure; An electronic blood pressure monitor characterized by comprising pressurization maximum value display means for displaying the pressurization maximum value of the maximum value storage means. (2) the blood pressure determining means includes systolic blood pressure determining means;
2. The electronic sphygmomanometer according to claim 1, wherein the maximum pressure value display means displays the maximum pressure value of the cuff pressure until the systolic blood pressure is determined by the systolic blood pressure determining means. (3) the blood pressure determining means includes pressurization insufficient detection means;
The electronic blood pressure according to claim 1, wherein at least when the insufficient pressurization detection means detects insufficient pressurization, the maximum pressurization value display means displays the maximum pressurization value of the cuff pressure. Total.