JP2002360524A - Electronic sphygmomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic sphygmomanometer capable of displaying pressure smoothly. SOLUTION: In the electronic sphygmomanometer, a CPU obtains the representative pressure on a time series of pressure inputted in time series as the result of being detected by a sensor concerning a cuff wound on a wrist when measuring blood pressure (steps S1a to S3). At the pressure displaying timing of a fixed period, pressure detected corresponding to the timing is compared with pressure on a straight line combining two representative pressures obtained just before on time series to display detected pressure when pressure on the straight line exceeds the detected pressure (step S6) and to display the pressure on the straight line in the other cases (step S5). Consequently, pressure is displayed smoothly when measuring blood pressure, thereby pressure at measurement can simply be read.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic sphygmomanometer, and more particularly to an electronic sphygmomanometer having a function of displaying measured pressure as blood pressure.

[0002]

2. Description of the Related Art When a doctor measures blood pressure using a conventional electronic sphygmomanometer, a cuff (arm band) attached to the electronic sphygmomanometer is wrapped around the arm and the electronic sphygmomanometer is wrapped around the arm. Press against the cuff with the rubber ball attached to. When pressurized, the pressure of the cuff is detected and displayed.Continue pressurizing while checking the displayed value, and confirm that the displayed pressure has reached the target pressure. I do. After that, the operation shifts to the pressure reducing operation for the pressure applied to the cuff, so that the doctor measures the blood pressure by looking at the displayed pressure value while listening to the Korotkoff sound with a stethoscope inserted in advance between the cuff and the arm. . Here, the target pressure corresponds to the value of assumed systolic blood pressure + α.

However, in such a conventional electronic sphygmomanometer, the pressure display value during pressurization is displayed as an instantaneous value or as a moving average value. In the case of displaying by an instantaneous value, a transient pressure value is displayed, and a value larger than the actual value may be displayed. In this case, the pressurization becomes insufficient and re-pressurization is required. When the moving average value is displayed, since the pressure value is displayed with a delay, the displayed value is smaller than the actual value. In this case, excessive pressure is applied to the patient, causing pain to the patient.

Further, the pressure display during the decompression is performed in synchronization with the pulse wave. In this case, if the pulse is fast, the display is updated quickly, so that it is difficult to read the displayed pressure value, and it is easy to read the highest or lowest blood pressure, which is not practical.

[0005] Therefore, an object of the present invention is to provide an electronic sphygmomanometer that can display pressure smoothly.

[0006]

An electronic sphygmomanometer according to an aspect of the present invention includes a cuff for attaching to a predetermined portion of a living body and compressing an artery, and a cuff operated to pressurize the inside of the cuff. It has a pressure unit, a cuff pressure reducing unit for reducing the pressure in the cuff, and a cuff pressure detecting unit for detecting the pressure in the cuff, and has the following features.

That is, representative pressure acquiring means for acquiring a time-series representative pressure of the pressures detected in the time series and detected by the cuff pressure detecting section, and two immediately preceding pressures acquired by the representative pressure acquiring means. Pressure display means for displaying a pressure based on a pressure on a straight line connecting the two representative pressures in time series.

Therefore, the pressure display means displays the pressure based on the pressure on the straight line connecting the two immediately preceding representative pressures obtained by the representative pressure obtaining means in a time series, so that the pressure is smoothly measured when measuring the blood pressure. Will be displayed.
Therefore, the pressure at the time of measurement becomes easy to read.

In the above-described electronic sphygmomanometer, during the period in which the cuff pressurizing section is operated and the inside of the cuff is pressurized, the representative pressure acquiring means determines the pressure at the time of the rise of the pressure wave due to the pressure input in time series. , May be obtained as the representative pressure.

Therefore, during the pressurization period, the pressure based on the pressure on the straight line connecting the pressure at the rising point of the pressure wave in a time series is displayed. Therefore, it is possible to prevent the pressure from being displayed larger or smaller than the actual pressure, and the pressure can be quickly and easily increased to the target pressure while watching the displayed pressure. Re-pressurization and unnecessary pressurization are eliminated and the convenience is excellent.

In the above-described electronic sphygmomanometer, during the period in which the cuff pressurizing section is operated and the inside of the cuff is pressurized, the representative pressure acquiring means includes the cuff pressure detecting section for each pressure wave due to the pressure input in time series. The representative pressure may be calculated and acquired using a plurality of pressures detected by the above.

Therefore, in the pressurization period, the pressure based on the pressure on the straight line connecting the pressures calculated using the plurality of pressures detected by the cuff detection unit for each pressure wave in a time series is displayed. . Therefore, the pressure is prevented from being displayed larger or smaller than the actual pressure, and the target pressure is quickly increased to the target pressure while watching the displayed pressure.
In addition, since pressurization can be easily performed, re-pressurization due to insufficient pressurization and unnecessary pressurization can be prevented, so that the convenience is excellent.

In the above-described electronic sphygmomanometer, after the cuff pressurizing section is operated and the artery is compressed by the pressure in the cuff, during the period in which the inside of the cuff is depressurized by the cuff depressurizing section, the representative pressure acquiring means operates as The pressure at the time of rising of the pulse wave of the artery input in the series may be acquired as the representative pressure.

Therefore, in the decompression period, the pressure based on the pressure on the straight line connecting the pressures at the rising points of the pulse wave in time series is displayed. Therefore, during the depressurization period, the pressure is displayed smoothly, and the maximum and minimum pressures can be quickly and easily specified by checking the displayed pressure while listening to the Korotkoff sound.

In the above-described electronic sphygmomanometer, after the cuff pressurizing section is operated and the artery is compressed by the pressure in the cuff, during the period in which the inside of the cuff is depressurized by the cuff depressurizing section, the representative pressure acquiring means is operated by The representative pressure may be calculated and acquired using a plurality of pressures detected by the cuff pressure detection unit for each pulse wave of the artery input in the series.

Therefore, during the depressurization period, even when the pressure for each pulse wave having individual differences is used, the representative pressure is calculated using the plurality of pressures detected for each pulse wave. It is possible to suppress an error caused by individual differences. Therefore, during the decompression period, the pressure processed so as to eliminate the error is displayed smoothly, so by checking the displayed pressure while listening to the Korotkoff sound, the more reliable maximum and minimum pressures can be quickly determined. ,
And can be easily identified.

In the above-described electronic sphygmomanometer, the pressure display means includes:
When the pressure on the straight line exceeds the pressure detected by the cuff pressure detection unit, the pressure detected by the cuff pressure detection unit may be displayed.

Therefore, when the pressure on the straight line exceeds the actually detected pressure, the actually detected pressure is displayed instead of the pressure on the straight line. Therefore, it is possible to reliably prevent a pressure higher than the actual pressure from being displayed.

In the above-mentioned electronic sphygmomanometer, the pressure display means may display the pressure according to a predetermined cycle. Accordingly, the cycle of updating the display of the pressure is constant, so that the displayed pressure is not missed and the convenience is excellent.

According to another aspect of the present invention, there is provided a pressure display method in an electronic sphygmomanometer, comprising: a cuff to be attached to a predetermined part of a living body to compress an artery; A method applied to an electronic sphygmomanometer provided with a cuff pressure reducing unit for reducing the pressure in the cuff and a cuff pressure detecting unit for detecting the pressure in the cuff, and has the following features. That is, a representative pressure acquisition step of acquiring a time-series representative pressure of the pressure detected by the cuff pressure detection unit and input in time series, and two representative pressures immediately before acquired by the representative pressure acquisition step. And a pressure display step of displaying a pressure based on a pressure on a straight line connecting the time series in a time series.

Therefore, in the pressure display step, the pressure based on the pressure on the straight line connecting the two immediately preceding representative pressures obtained in the representative pressure obtaining step in a time series is displayed. Will be displayed. Therefore, the pressure at the time of measurement becomes easy to read.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B are configuration diagrams of an electronic sphygmomanometer applied to each embodiment of the present invention. FIG.
The electronic sphygmomanometers shown in (A) and (B) are wrapped around the arm for measuring blood pressure, and are operated to pressurize the inside of the cuff 1, which is a cuff 1 that is an air bag for compressing an artery. A rubber ball pressurizing pump 2, an electromagnetic exhaust valve 3 for reducing the pressure in the cuff 1, a pressure sensor 4 for detecting a pressure in the cuff 1 (hereinafter also referred to as cuff pressure), and various controls are executed. C for
A PU (abbreviated central processing unit) 7, an LCD (abbreviated liquid crystal display) display section 8 for displaying various information, and switches 9 operated externally are provided. The pressurizing pump 2, the electromagnetic exhaust valve 3, the pressure sensor 4 and the cuff 1
Are connected by Each switch 9 includes an end switch 91 operated to end the blood pressure measurement operation, and a power switch 92 operated to turn on / off the power of the electronic sphygmomanometer and to initialize. Since the signal of the pressure of the cuff 1 detected by the pressure sensor 4 is given to the CPU 7 and read, the CPU 7 processes the read pressure signal and displays the digital signal on the LCD display unit 8.

FIG. 2 shows the pressure P of the cuff 1 during pressurization and decompression in the electronic sphygmomanometer shown in FIGS. 1 (A) and 1 (B).
FIG. 7 is a diagram showing a change with time t. In FIG. 2, the vertical axis represents the pressure P of the cuff 1, and the horizontal axis represents the elapsed time t.
Is adopted. The operation of the electronic sphygmomanometer will be described with reference to FIGS. 1A and 1B and FIG.

The doctor wraps the cuff 1 around the patient's arm,
When a stethoscope is inserted between the cuff 1 and the arm, the cuff 1 is manually pressurized while pushing the rubber ball of the pressurizing pump 2 to measure blood pressure. As shown in FIG. It gradually rises and the artery of the arm is compressed by the pressure in the cuff 1 to reach the target pressure. Thereafter, a predetermined time period the pressure P the time t _p that is detected not to rise, CPU 7 proceeds to the depressurization operation and controls to open the electromagnetic exhaust valve 3.

In the depressurizing operation in the cuff 1, the cuff 1 is exhausted at a low speed through the electromagnetic exhaust valve 3.
Pulse waves are gradually detected from the compressed artery. During this low-speed exhaust, the doctor listens to the Korotkoff sound from the artery by auscultation measurement, observes the cuff pressure displayed on the LCD display unit 8, and observes the systolic blood pressure (the pressure at the time when the Korotkoff sound starts to be heard) and the diastolic blood pressure ( The pressure at which the Korotkoff sound is no longer heard) is determined and read. After the reading is completed, the doctor presses the end switch 91.
The PU 7 controls the electromagnetic exhaust valve 3 to rapidly exhaust the cuff 1 and the blood pressure measurement ends. In the depressurizing operation, a pressure P on which a pulse wave is superimposed is detected as shown in FIG.

(Embodiment 1) FIG. 3 is a flowchart for displaying pressure during pressurization according to Embodiment 1 of the present invention. FIG. 4 is a diagram showing a temporal change of the pressure of the cuff 1 for explaining the flowchart of FIG. In FIG. 4, the vertical axis represents the pressure P of the cuff 1, and the horizontal axis represents the elapsed time t.
Is adopted. The procedure for displaying the pressure during pressurization will be described with reference to the flowchart of FIG. 3 while referring to FIG. It is assumed that the electronic sphygmomanometer is powered off and the electromagnetic exhaust valve 3 is open. Further, the pressure display processing according to the flowchart of FIG. 3 is performed at a constant cycle (for example, a 0.5 second cycle).
Assume that this is done in It is also assumed that CPU 7 reads the pressure value of cuff 1 via pressure sensor 4 at a period sufficiently faster than the display period, for example, 30 msec.

When the cuff 1 is wound on the patient's arm and the blood pressure measurement state using auscultation measurement is set, the doctor pushes the rubber ball of the pressurizing pump 2 two or three times. The applied pressure P gradually increases. Thereafter, it is determined whether or not the pressure P has reached a specified pressure (for example, 20 mmHg) or more. If the pressure has not reached (N in step S1), the CPU 7 reads the cuff 1 read via the pressure sensor 4.
Is displayed on the LCD display unit 8 as the current pressure _Pn (step S6), and the process returns to step S1.

On the other hand, when the pressure P has reached the specified pressure (Y in S1), the rising point of the pressure P is detected (step S1a). Specifically, the pressure P at time t _Rn which is the detected pressure rising point is changed to pressure P _Rn
(N = 1, 2, 3,...) Are sequentially stored in a memory (not shown) of the CPU 7.

If the second pressure rising point is not detected beyond the specified pressure (N in step S2), the detected pressure P at time t _n synchronized with the display cycle is set as the current pressure P _n on the LCD display unit 8. Display (N in step S2 and step S
6). Then, the process returns to step S1.

On the other hand, is subsequently detecting a second pressure rising point determine the pressure P _Cn at time t _n synchronized with the (Y at step S2), the display cycle (Step S3). Specifically, the pressure P _Rn at the time t _Rn, which is the nearest pressure rising point, and the time t _Rn , which is the immediately preceding pressure rising point,
And _{R (n-1)} of the pressure P _{R (n-1)} is read from the memory, these two points connected by a straight line as shown in Figure 4, determine the pressure P _Cn using the formula straight line. The pressure P _Cn is obtained by the following equation (1).

P _Cn = ((P _Rn −P _{R (n−1)} ) / (t _Rn −t _{R (n−1)} )) * (t _n −t _Rn ) + P _Rn (Equation 1) The detected pressure P _n at the time t _n synchronized with the display cycle is compared with the pressure P _Cn obtained according to the equation 1, and when the pressure P _n exceeds the pressure P _Cn (Y in step S4), the pressure P _Cn Is displayed on the LCD display section 8 (step S
5) If not exceeded (N in step S4), pressure P _n
Is displayed on the LCD display section 8 (step S6). Thereafter, the process returns to step S1, and thereafter, the same process is repeated.

Therefore, a smooth value can be obtained without displaying the pressure value larger or smaller than the actual value at the time of pressurization.
Since the display is updated at regular intervals, it is possible to easily pressurize the target pressure by performing a pressurizing operation while checking the display contents.

[0034] Thereafter, when reaching the target pressure at the time t _p in FIG. 4, the process proceeds to decompression operation opens electromagnetic exhaust valve 3 as described above. Hereinafter, pressure display during depressurization will be described.

FIG. 5 is a flowchart showing a procedure for displaying a pressure during decompression according to the first embodiment. FIG.
FIG. 5 is a diagram showing a change in pressure P of the cuff 1 during decompression with the elapse of time t according to the first embodiment. In FIG. 6, the vertical axis represents the pressure P of the cuff 1, and the horizontal axis represents the elapsed time t. The display of the pressure during depressurization is also performed at a constant cycle, for example, 0.5 second cycle, as described above. Assume that this is done in In this case, the following processing is performed to smoothly display the pressure value during depressurization.

As described above, the pressure is increased to the target pressure.
At time t, when it is determined that the electromagnetic exhaust valve 3 is opened and the pressure-reducing operation has been started (Y in step S10), a pulse wave (see FIG. 6 (a wave indicated by a dotted circle) (step S10a). In particular,
The pressure P _Rn at the detected rising point of the pulse wave (time t _Rn ) is read and stored in a memory (not shown) of the CPU 7.

During the depressurizing operation, a pulse is generated, and the peak value of the pressure P becomes higher than the original value and includes an error. In this case, in order to eliminate the error, the rising point of the pulse wave rising point is determined. The pressure _PRn has been read.

[0038] (N in step S12) until the second pulse Hattachi up point after transition to depressurization operation is detected, the pressure detected at the time t _n in synchronization with the display cycle P _n is the LCD display 8 Is displayed (Step S16), and Step S10
Return to the processing of.

On the other hand, after the detection of the second pulse wave rising point (Y in step S12), the time t _n synchronized with the display cycle is reached.
The pressure P _Rn at the pulse wave rising point and the pressure P _{R (n-1)} detected at the immediately preceding pulse wave rising point are read out from the memory, and the equation of a straight line connecting the two rising points is used. Te, determine the pressure P _Cn at time t _n (step S13). This equation is shown in Equation 2 below.

P _Cn = ((P _Rn −P _{R (n−1)} ) / (t _Rn −t _{R (n−1)} )) * (t _n −t _Rn ) + P _Rn (Equation 2) It is determined whether the detected current pressure PR exceeds the pressure P _Cn obtained as described above (step S1).
4). If it is determined to exceed (Y in step S14),
The calculated pressure P _Cn is displayed on the LCD display unit 8 (step S15). If it is determined that the pressure P _Cn does not exceed the value (N in step S14), the current detected pressure P _n is displayed on the LCD.
It is displayed on the display unit 8 (step S16). After that, the process returns to step S10, and the same process is repeated.

As described above, the pulse wave rising point during depressurization is detected, the pressure P _Rn at that time is stored, and the equation of a straight line connecting the nearest pulse wave rising point and the immediately preceding pulse wave rising point is obtained. Is displayed at a predetermined display cycle using the pressure P _Cn calculated using Therefore, since the display is updated at a constant period without being influenced by the pulse speed without the pressure value becoming excessively large or small, the displayed pressure value is easy to read.

(Embodiment 2) Next, Embodiment 2 will be described. In the above-described pressure display during pressurization in the first embodiment, the pressure display is performed using the pressure P _Rn at the pressure rising point. However, in the second embodiment, the pressure display during the pressurization is the pressure. The pressure is displayed while using the pressure at the representative point.

FIG. 7 is a flowchart showing a procedure for displaying pressure during pressurization according to the second embodiment. FIG. 8 is a diagram showing a change in pressure P during pressurization with time t according to the second embodiment. 8, the vertical axis represents the pressure P of the cuff 1, and the horizontal axis represents the elapsed time t. In the operation, the pressure is displayed at a constant cycle, for example, 0.5 second cycle, and the CPU of the pressure P via the pressure sensor 4 of the cuff 1 is displayed.
7 is a period sufficiently faster than the display period, for example, 3
It is assumed that the processing is performed at 0 msec.

As described above, while the doctor pushes the pressurizing pump 2 and does not exceed the specified pressure, for example, 20 mmHg (N in step S20), the pressure _Pn to be read becomes _equal to LC.
Although displayed on the D display unit 8 (step S26), when the pressure exceeds the specified pressure (Y in step S20), detection is performed for the representative pressure wave point (step S20a). Specifically, is detected rising point and the peak point pressure for each pressure wave, calculates the pressure P in each of the detection points as a pressure P _Bn and the pressure P _Tn, the pressure P _Rn of the pressure wave representative point in accordance with Equation 3 Then, the data is sequentially stored in a memory (not shown) of the CPU 7.

P _Rn = P _Bn + (P _Tn −P _Bn ) / 3 (Equation 3) Thereafter, it is synchronized with the display cycle until the second pressure wave representative point exceeds the specified pressure and is detected. the pressure P _n detected at time t _n is displayed on the LCD display unit 8 (n and S26 in step S22). After that, the process returns to step S20.

Meanwhile, the subsequent the detection is for the second pressure wave representative point (Y in step S22), and the pressure P _Rn in close pressure wave representative point in time t _n in synchronization with the display cycle
And the pressure P at the representative point of the pressure wave detected one more time before
_{R (n-1)} is read from the memory, and the pressure P _Cn is obtained by using the following equation 4 showing a straight line connecting these two points (step S23).

P _Cn = ((P _Rn −P _{R (n−1)} ) / (t _Rn −t _{R (n−1)} )) * (t _n −t _Rn ) + P _Rn (Equation 4) When the detected pressure P _n at the time t _n synchronized with the display cycle exceeds the pressure P _Cn calculated using Equation 4 (Y in step S24), the obtained pressure P _Cn is _displayed on the LCD.
The pressure _Pn is displayed on the display unit 8 (step S25), and if not exceeded (N in step S24), the pressure _Pn detected at that time is displayed on the LCD display unit 8 (step S2).
6). Thereafter, the process returns to step S20, and the same process is repeated thereafter.

In the second embodiment, the pressure value determined in step S20a at the pressure wave representative point P _Rn according to equation 3 can be smoothly displayed at a predetermined cycle synchronized with the display cycle. Note that the constant in Expression 3 is not limited to the value 3.

[0049] If is continuously above pressure reaches the target pressure at time t _p in Fig. 8, the electromagnetic exhaust valve 3 is shifted in a reduced pressure state is opened. FIG. 9 is a flowchart showing a procedure for displaying pressure during depressurization according to the second embodiment. FIG.
FIG. 8 is a diagram showing a change in pressure P during decompression with time t according to the second embodiment. In FIG. 10, the pressure P of the cuff 1 is plotted on the vertical axis, and the elapsed time t is plotted on the horizontal axis.

[0050] If it has shifted to the depressurization operation at time t _p described above is detected (Y in step S30), is detected for pulse waves representative point is made (step S30a).
Specifically, each time a pulse wave indicated by a dotted circle in FIG. 10 appears, a pulse wave rising point and a peak point are detected, and the pressures P _Bn and P _Tn which are the pressures P at the respective detection points are determined. The pressure P _{RN at the} representative point of the pulse wave according to the following equation 5 showing the connecting straight line
Is calculated and sequentially stored in a memory (not shown) of the CPU 7 (step S30a).

P _Rn = P _Bn + (P _Tn −P _Bn ) / 5 (Equation 5) According to Equation 5, the pressure at which the pressure P at the pressure wave rising point is considered to be a value excessively lowered by a person is considered. P _Rn can be calculated. Here, the constant 5 is used to allocate an error caused by such individual differences, but this is an example, and the constant value is not limited to 5.

[0052] After the transition to the depressurization operation, and the second to the pulse wave representative point is detected (N at step S32), LCD displays the pressure P _n being detected at time t _n in synchronization with the display cycle It is displayed on the unit 8 (step S36).

On the other hand, after the detection of the second representative point of the pulse wave (Y in step S32), the pressure P _Rn of the nearby representative point of the pulse wave is detected one time before the time t _n synchronized with the display cycle. The pressure PR _{(n-1) of the} representative pulse wave point is read from the memory,
In accordance with Equation 6 showing a line connecting these two points to calculate the pressure P _Cn of the time t _n (step S33).

P _Cn = ((P _Rn −P _{R (n−1)} ) / (t _Rn −t _{R (n−1)} )) * (t _n −t _Rn ) + P _Rn (Equation 6) The pressure P _Cn calculated as described above is compared with the detected pressure P _n (step S34). Comparison result, a constant value smaller Do value pressure P _n is higher than the pressure P _Cn (P _Cn -
α) is exceeded (step S34)
Y), the pressure P _Cn calculated by the equation 6 is displayed on the LCD display unit 8 (step S35), and if it is determined that the pressure P _Cn is not exceeded (N in step S34), the detected pressure P _n is reduced to L.
It is displayed on the CD display section 8 (step S36). Thereafter, the process returns to step S30, and the subsequent processing is repeated in the same manner.

In the second embodiment, the pressure P _Cn is determined and displayed by using the pressure P _{Rn of the} representative point of the pulse wave according to the equation 6, so that the pressure display during the depressurization becomes smooth. Therefore, as described above, by displaying the pressure value in a predetermined cycle in consideration of the error caused by the individual difference of the pulse wave, a more accurate pressure value can be smoothly displayed.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0057]

According to the present invention, at the time of blood pressure measurement, the pressure is displayed based on the pressure on the straight line connecting the two immediately preceding representative pressures obtained based on the detected pressure in the cuff in a time series. Therefore, the pressure is smoothly displayed. Therefore, the pressure at the time of measurement becomes easy to read.

[Brief description of the drawings]

FIGS. 1A and 1B are configuration diagrams of an electronic sphygmomanometer applied to each embodiment of the present invention.

FIG. 2 shows a change with time t of pressure P detected by pressure sensor 4 of cuff 1 during pressurization and depressurization in the electronic sphygmomanometer shown in FIGS. 1 (A) and 1 (B). FIG.

FIG. 3 is a flowchart for displaying pressure during pressurization according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a change with time of the pressure of the cuff 1 for explaining the flowchart of FIG. 3;

FIG. 5 is a flowchart showing a procedure for displaying pressure during depressurization according to the first embodiment.

FIG. 6 is a diagram showing a change in pressure P of cuff 1 during decompression with time t according to the first embodiment.

FIG. 7 is a flowchart showing a pressure display procedure during pressurization according to the second embodiment.

FIG. 8 is a diagram showing a change with time t of pressure P during pressurization according to the second embodiment.

FIG. 9 is a flowchart showing a procedure for displaying pressure during depressurization according to the second embodiment.

FIG. 10 is a diagram showing a change of pressure P during decompression with time t according to the second embodiment.

[Explanation of symbols]

1 cuff, 2 pressurizing pump, 3 electromagnetic exhaust valve, 4 pressure sensor, 7 CPU, 8 LCD display, 91 end switch, 92 power switch, P pressure, t time.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tameo Ashida Shiokyo-dori, Shimogyo-ku, Kyoto 801 Minami-Fudo-do, Higashiri-ri, Horikawa Inside Omron Life Science Research Inc. (72) Inventor Norihito Yamamoto Shiokyo-dori, Shimogyo-ku, Kyoto-shi 801 Horikawa Higashiiri Minami Fudo-do Town OMRON Life Science Laboratories Co., Ltd. (72) Inventor Tsutomu Tanihira 801 Shimogyo-ku, Kyoto City Shimogyo Horikawa Higashi-iri Minami Fudodou Town F-term in Omron Life Science Laboratories Co., Ltd. 4C017 AA08 AB01 AC01 AD01 BC11 FF30

Claims (7)

[Claims] 1. A cuff for attaching to a predetermined part of a living body and compressing an artery, a cuff pressurizing unit operated to pressurize the inside of the cuff, and a cuff depressurizing unit for decompressing the inside of the cuff. An electronic sphygmomanometer, comprising: a cuff pressure detection unit for detecting a pressure in the cuff, wherein the pressure detected by the cuff detection unit and input in time series is a representative in the time series. Representative pressure obtaining means for obtaining a pressure to be performed; and pressure display means for displaying pressure based on a pressure on a straight line connecting the two immediately preceding representative pressures obtained by the representative pressure obtaining means in the time series. An electronic sphygmomanometer further comprising: 2. In a period in which the cuff pressurizing unit is operated and the inside of the cuff is pressurized, the representative pressure acquiring unit determines a pressure at the time of rising of a pressure wave due to the pressure input in the time series. The electronic sphygmomanometer according to claim 1, wherein the electronic sphygmomanometer is obtained as the representative pressure. 3. In a period in which the cuff pressurizing unit is operated and the inside of the cuff is pressurized, the representative pressure acquiring unit is configured to generate the cuff detecting unit for each pressure wave due to the pressure input in the time series. The electronic sphygmomanometer according to claim 1, wherein the representative pressure is calculated and acquired using a plurality of pressures detected by the method. 4. After the cuff pressurizing section is operated and the artery is compressed by the pressure in the cuff, and during the period in which the cuff is depressurized by the cuff depressurizing section, the representative pressure acquiring means includes: 4. The electronic sphygmomanometer according to claim 1, wherein the pressure at the time of rising of the pulse wave of the artery input in the time series is acquired as the representative pressure. 5. 5. After the cuff pressurizing section is operated and the artery is squeezed by the pressure in the cuff, and during the period in which the inside of the cuff is depressurized by the cuff depressurizing section, the representative pressure obtaining means includes: The method according to claim 1, wherein the representative pressure is calculated and obtained using a plurality of pressures detected by the cuff detection unit for each pulse wave of the artery input in the time series. 5. The electronic sphygmomanometer according to any one of the above. 6. The pressure display means, when the pressure on the straight line exceeds the pressure detected by the cuff detection unit, displays the pressure detected by the cuff detection unit. The electronic sphygmomanometer according to claim 1. 7. The electronic sphygmomanometer according to claim 1, wherein the pressure display means displays the pressure according to a predetermined cycle.