JPS62298335A - 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 3. Detailed Description of the Invention (a) Field of Industrial Application This invention relates to an electronic blood pressure monitor, and particularly to an electronic blood pressure monitor equipped with a storage means such as a memory card.

(b) Prior Art Electronic blood pressure monitors that are well known in general include those using the K-tone method and those using the vibration method. The K-sound method involves pressurizing the air bag in the cuff to block the arterial flow in the upper arm, then stopping the pressurization and depressurizing it at a very slow rate. High blood pressure is defined as high blood pressure, and the pressure in the air bladder at the time the sound disappears is defined as diastolic blood pressure. The vibration method similarly determines the systolic blood pressure and diastolic blood pressure by applying a predetermined algorithm to the vascular information In (eg, pulse wave amplitude) obtained in the slow decompression process after the arterial flow is ischemized.

Among the above, electronic sphygmomanometers using the K method have large measurement errors in people with low K sound levels, and the vibration method has large measurement errors.
Measurement errors will be large for people whose pulse wave envelope path does not match the adopted algorithm. In other words, there is the problem of individual differences, and to solve this problem, auscultation is used in addition to measurements using the K-tone method and vibration method, so that errors can be confirmed and corrected by actually listening to the sound. An electronic blood pressure monitor is provided in the room.

On the other hand, an electronic blood pressure monitor has been proposed in which a storage means such as an IC memory card is attached to the main body of the blood pressure measurement unit to store past measurement data of individual differences.

(C) Problems to be Solved by the Invention The electronic blood pressure monitor that uses the auscultation method described above can reduce errors because the values measured electronically by the blood pressure measuring means can be confirmed by the values measured by the auscultation method. However, the auscultation method required skill in the measurement method and was difficult for sailors to use.

In view of the above, an object of the present invention is to provide an electronic blood pressure monitor that does not cause individual differences even when a general measurement person does not use the auscultation method.

(d) Means and operation for solving the problems The electronic blood pressure monitor of the present invention includes, in addition to the blood pressure measurement means and the display section, a storage means (for example, an IC memory card) capable of reading and writing blood pressure data. The storage means includes an area for storing a relational value (for example, a difference value) between the correct blood pressure value and the measurement result obtained by the blood pressure measurement means, and the relational value is corrected to the measurement result of the blood pressure measurement means at the time of measurement. It is characteristically equipped with the means to do so.

In this electronic blood pressure monitor, the relationship value between the correct blood pressure value measured in advance by a doctor or other specialist by auscultation method and the measurement result obtained by electronic processing is stored in the storage means. In this case, the relationship value is corrected to the measurement result measured by the blood pressure measuring means to correct the blood pressure value.

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

FIG. 1 is a perspective view of an electronic blood pressure monitor showing an embodiment of the present invention.

This electronic blood pressure monitor has a built-in sound sensor 2 for detecting K-sound information (see Figure 2), a cuff 1 for ischemizing the brachial artery, and a cuff 1 connected to the cuff 1 via a tube 3. It consists of a meter body 4 which is

On the top surface of the instrument body 4, in addition to the display section 5, power switch 6, start switch 7, and pressurization value setter 8, there are a memory insertion section 10 for inserting a memory card 9, a write switch 11, and a numeric keypad. 12 are provided.

FIG. 2 is a block diagram showing the circuit configuration of the electronic blood pressure monitor according to the embodiment. The cuff 1 is connected to a pressure pump 13, a solenoid valve (rapid exhaust valve) 14, a slow exhaust valve 15, and a pressure sensor 16 via a tube 17. Pressure sensor 16
is an electric pressure gauge using a piezoelectric transducer or the like, which constantly detects changes in the pressure applied to the cuff 1, and the detected output is amplified as a signal by the amplifier circuit 18, and the MPU 20 is output by the A/D converter 19. It is converted into a digital value that is easy to capture.

The K sound sensor 2 converts the detected sound into an electrical signal, the amplifier circuit 21 amplifies the sound signal, and the comparison circuit 22 compares the sound signal with a reference signal, and if the K sound signal is higher than the reference signal, the K sound sensor 2 converts the detected sound into an electrical signal. If so, a K-containing signal is output to the MPU 20.

The MPU 20 has a built-in memory for storing programs and measurement data, and also has a function of importing cuff pressure data and K sound data, a function of turning on/off the pressurizing pump 1, and a function of inputting blood pressure values from sound data to cuff pressure data. It has functions such as determining the

Furthermore, the MPU 20 has a function to correct the difference value between the correct blood pressure value (true value) stored in the memory card 9 and the measured value obtained by the blood pressure determination function as a correction value for the current blood pressure determination value. ing.

The memory card (using an IC card, etc.) 9 stores personal data such as name, age, gender, date of birth, height, weight, occupation, blood type, etc., as well as the ID registration date and the doctor's auscultation method. The difference value between the blood pressure value (true value) measured by and the measurement result of the electronic blood pressure monitor of the example in that case is recorded as tα. Writing to the memory card 9 is performed by attaching the memory card 9 to the read/write circuit 23 and inputting the numerical value of the difference using the numeric keypad 12.

Next, the operation of the electronic sphygmomanometer according to the embodiment will be explained with reference to the flowchart shown in FIG.

When the power switch 6 is turned on, first, so-called initialization processing such as clearing the memory and initial settings is performed.
Step ST (hereinafter referred to as ST1)], when the start switch 7 is turned on while the cafe is being worn on the upper arm, the pressure pump 13 is turned on and pressurization is started (Sr1).

As a result, the cuff pressure P increases, and when the cuff pressure eventually becomes equal to the value set by the pressurization value setting device 8, the pressurization pump 13 is turned off and pressurization is stopped (ST3). After that, the slow exhaust valve 15 gradually exhausts the gas at a rate of 2 to 3 m/s.
sec, the pressure P of the cuff 1 is reduced (ST4), and thereafter, blood pressure measurement is started at a predetermined sampling time (
ST5).

First, in the process of decreasing the cuff pressure, when a K-containing signal is obtained via the K sound sensor 2, the amplifier circuit 21, and the comparison circuit 22, the cuff pressure corresponding to that point is determined to be the systolic blood pressure Sa. (ST6). Thereafter, the K sound is detected continuously, but as the cuff pressure gradually decreases, the time point at which the K sound disappears is detected. The cuff pressure corresponding to the point at which the sound disappears is determined as the diastolic blood pressure DA (ST7).

When the above systolic blood pressure SA and diastolic blood pressure DA are determined,
This means that the current blood pressure measurement has been completed, and the rapid exhaust valve 14
is opened and the pressure in the cafe is rapidly reduced (ST8
).

Next, the process moves to ST9, and the presence or absence of the memory card 9 is determined. This determination of whether or not a memory card is present is determined based on whether or not the memory card 9 is set in the read/write circuit 23. If the personal memory card 9 is not set, the determination in ST9 is NO, and the currently measured systolic blood pressure SA and diastolic blood pressure DA are displayed on the display unit 5 (S'l'10). This measurement mode is similar to that of ordinary electronic blood pressure monitors that are generally available on the market. Here, if the next start switch is turned on and a re-measurement is to be performed, the process returns to ST2, but if it is not turned on, the measurement ends.

On the other hand, if the memory card 9 is set in the read/write circuit 23 in ST9, the determination is YES and 5T1
Move on to 2. In 5T12, ΔS,
Δ) and n are read.

Here, ΔS is the systolic blood pressure S actually measured with an electronic blood pressure monitor.
A and the true value SI1 measured by a doctor or the like based on the auscultation method.The measurement error ΔS1. ΔS2.・・・・・・、
This is the average value of ΔSn. Similarly, ΔN is the difference value ΔD1. ΔD2,...
. . . is the average value of ΔDn. These measurement error average values Δmi and Δ are read out from the memory card 9, and correction calculations are performed on the already determined measurement values Sa and Da. That is, the corrected measurements are Sc+ΔS, respectively.

D, = DA + Δ).

becomes. Here, the systolic blood pressure SA and the diastolic blood pressure DA are values measured with the electronic blood pressure monitor of the example as described above, and on average, there are errors of Δmi and Δheart between the true values Sa and Da. By adding these errors, it is possible to obtain the true blood pressure values Sc and Dc (ST13).

Next, the corrected systolic blood pressure SC and diastolic blood pressure DC are displayed on the display section 5 (ST 14). Now the measurer can:
Accurate measurement results can be obtained.

Next, the process moves to 5T15, and it is determined whether the true value S, (D,) has been input. Here, if the true value 5Il(D,) is not input, the judgment will be No, and 5T16.5T
Skip 17 and move on to 5T18. On the other hand, the true value 5l (
If DI) is input, the determination at 5T15 is YES, and the process moves to 5T16, where the systolic blood pressure difference value ΔS and the diastolic blood pressure difference value ΔD are calculated. That is, Δ5=SA−S.

ΔD=DA−D,.

As a result, the difference value between the current measurement result and the true value, that is, the measurement errors ΔS and ΔD are calculated. Next, move to 5T17, set n to n+1, increment the count value n that counts the number of calculations of measurement errors ΔS and ΔD, and at the same time
By adding D to the cumulative values of ΔS and ΔD up to that point, the average measurement error values ΔS and ΔR are determined.

In 5T1B, it is determined whether or not to record the measurement data on the memory card 9, and if the write switch 11 is not turned on, the process jumps to 5TII, but if the write switch 11 is turned on, Sc, l)c1Δmi , Δ10,n data will be written to the memory card 9 as the current data (ST19).

In the manner described above, the measurement operation is repeated m times.

In the above embodiment, the correction value is the measurement error ΔS1. when the true value is input. ΔS2. ......, the average value ΔS of ΔSn is memorized and then this ΔI is subtracted from the measurement result, but instead of this, the correction value is not an average value but a percentage, and ΔS /! It may be calculated as rx100 (%).

In the above embodiment, the true values Sc and DC are input using the numeric keypad 12 in order to obtain the measurement error average values Δmi, Δ), etc., but instead of the numeric keypad, the auscultation method key is Alternatively, the measurement person may actually apply a stethoscope to the cuff pressure and memorize the cuff pressure corresponding to the appearance and disappearance of the K sound as the true value.

Furthermore, although the above embodiment has been described using an electronic blood pressure monitor that uses the K-tone method as an example, it is of course applicable to an electronic blood pressure monitor that uses the vibration method.

In the vibration method, for example, the wave height of continuous pulse waves is measured, and the pressure to obtain a value of X% of the maximum wave height is SYS,
There is a method of setting the pressure at which 7% is obtained as DIA. in this case,
The values of x and y are determined between approximately 40% and 80%, but there are slight differences between individuals, and when x and y are held constant, this difference contributes to individual measurement errors. As an application of the present invention, by recording the values of x and y on a personal card, it is also possible to subsequently correct the measurement results using this personal x1y.

(f) Effects of the Invention According to the present invention, the measurement error between the measurement result by an individual's electronic blood pressure monitor and the result obtained by the so-called auscultation method is stored in advance in a memory card or the like, and thereafter, When taking normal measurements, the measurement results taken with an electronic blood pressure monitor are corrected by taking into account the memorized measurement errors to obtain the final results. Even if there are individual differences, highly accurate measurements can be made that take constitutional error factors into account.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an electronic blood pressure monitor showing an embodiment of the present invention, Fig. 2 is a block diagram showing the circuit configuration of the electronic blood pressure monitor, and Fig. 3 explains the operation of the electronic blood pressure monitor. FIG. 1: Cuff, 2: Sound sensor, 5: Display section,
9: Memory card, 13: Pressure pump, 14: Rapid exhaust valve, 15°: Slow exhaust valve, 16: Pressure sensor, 20
: MPU, 23: Read/write circuit. Patent applicant Tateishi Electric Co., Ltd. (Baka 1
given name)

Claims (1)

[Claims] (1) In an electronic sphygmomanometer comprising, in addition to a blood pressure measuring means and a display unit, a memory means capable of reading and writing blood pressure data, the memory means having a relationship value between a correct blood pressure value and a measurement result obtained by the blood pressure measuring means. What is claimed is: 1. An electronic sphygmomanometer comprising: an area for storing , and means for correcting and computing the relational value to the measurement result of the blood pressure measuring means during measurement.