What exactly is a wrist electronic sphygmomanometer?

Wrist electronic sphygmomanometer is a kind of electronic sphygmomanometer. This is a multifunctional and fully automatic intelligent blood pressure measuring instrument with wrist electronic sphygmomanometer in wolman.

It has LCD screen and microcomputer automatic control, which can measure your blood pressure and pulse quickly and accurately, and help you to check your blood pressure and pulse regularly.

It also has the function of overpressure for 3 seconds and unconditional rapid deflation, which makes your work simpler and safer, and also allows you to master your health status anytime and anywhere.

Development course:

With the development of science and technology, sphygmomanometer bid farewell to the traditional mercury sphygmomanometer and ushered in the era of wrist electronic sphygmomanometer! Modern electronic sphygmomanometers are divided into two categories: wrist electronic sphygmomanometers and household electronic sphygmomanometers.

Wrist electronic sphygmomanometer is mainly used in outpatient department, blood station, blood collection vehicle, medical examination vehicle, health management medical examination center, rehabilitation center, sanatorium, community, school, bank, factory, sports ground and other public health.

The wrist electronic sphygmomanometer is mainly used at home.

Family health care has become the health care fashion of modern people.

In the past, people had to measure blood pressure. Now, as long as they have a home electronic sphygmomanometer, they can monitor the changes of blood pressure at any time while sitting at home. If they find abnormal blood pressure, they can go in time to prevent sudden attacks of diseases such as cerebral hemorrhage and heart failure.

In recent years, according to the international proposal "Provisions on the Revised Draft of Sphygmomanometer" put forward by the International Organization for Legal Metrology, the scale of sphygmomanometer has been changed from mmHg to kPa.

1 kpa = 7.5 mmhg, and the dividing value on the scale is 0.5kPa.

At present, there are two scales on the sphygmomanometer, so please pay attention when applying.

It should be noted that wrist electronic sphygmomanometer is not suitable for patients with blood circulation disorders, such as diabetes, hyperlipidemia, hypertension and other diseases will accelerate arteriosclerosis, thus causing peripheral circulation disorders.

The blood pressure measurements of these wrists are quite different from those of the upper arms.

It is recommended that these and the elderly choose the arm electronic sphygmomanometer.

In addition, before the field measurement, in order to choose the right electronic sphygmomanometer.

Whether the wrist electronic sphygmomanometer measures blood pressure accurately is a hot spot of hypertension.

In order to make people use qualified electronic sphygmomanometers, the State Bureau of Quality and Technical Supervision conducted a national supervision and spot check on the product quality of electronic sphygmomanometers in the second quarter of 1998, and the qualified rate of wrist electronic sphygmomanometers was 78.6%.

It should be said that the electronic sphygmomanometers on the market at present are basically good and can accurately measure blood pressure.

However, different forms and brands of electronic sphygmomanometers have different ranges of measuring blood pressure and applicability to patients.

For example, the upper limit of systolic blood pressure of some electronic sphygmomanometers is 200mm Hg (26.7kPa), and the upper limit of diastolic blood pressure is150mm Hg (20.0kPa).

Some electronic sphygmomanometers are larger than the above upper limit.

For example, the application of intelligent electronic sphygmomanometer in sick people is wider than that of non-intelligent electronic sphygmomanometer.

Whether the electronic sphygmomanometer measures blood pressure accurately is relative.

Blood pressure measurement is accurate within the range of blood pressure measurement allowed by electronic sphygmomanometer and applicable people.

Beyond the application range of electronic sphygmomanometer, blood pressure measurement will be inaccurate or may not be measured.

However, there is a wolman wrist electronic sphygmomanometer on the market recently, and the measurement effect is very good! How to use wrist electronic sphygmomanometer;

1. Preparation before examination: Before blood pressure measurement, you must rest in a quiet environment for 5- 10 minutes to relax your body and mind, and then start the measurement.

2. Body position, posture and work: The subjects take supine position or sitting position.

Generally, the right arm is measured so that the elbow joint is at the same level, and the upper arm is straight and slightly abduction.

The cuff airbag is close to the skin, and the lower edge is 2-3 cm away from the elbow bend, neither too tight nor too loose.

Mercury sphygmomanometer needs to put the stethoscope at the elbow where the brachial artery beats, not under the cuff.

3. Reading: Due to the high sensitivity of the instrument, different procedures, tight cuffs and different postures, the measurement results will be different.

After the cuff is loosened, it can be measured once or twice every few minutes, and the average value can be taken.

Key components:

1. Air pressure sensor is the most critical component used in electronic sphygmomanometer at present, which is divided into two types, one is capacitive air pressure sensor and the other is resistive air pressure sensor.

1.

Electrostatic capacitance gas pressure sensor

The mainstream sensor used in electronic sphygmomanometer has the advantages of good linearity and easy temperature compensation.

The disadvantage is that there is no standard product. Only a few companies in the world can use this kind of sensor, and they have patents on this technology, and only these companies can use it.

Companies with this technology patent, such as: Jinyidi Technology Co., Ltd., Omron, Ai Ande, etc.

2.

Resistance gas pressure sensor

This year, it has been used by suppliers in Chinese mainland and some suppliers. Its advantage is that it can use standard products (IC companies), which is especially beneficial for solution providers to promote their own solutions, and solution providers do not need their own sensors.

Its disadvantage is that temperature compensation is not easy.

Second, the pressurized micro air pump At present, there are two kinds of micro air pumps used in electronic sphygmomanometers.

1.

Ordinary miniature air pump

The miniature air pump used for the first and second generation electronic sphygmomanometers —— Reduced Pressure Synchronous Measurement (MWD) electronic sphygmomanometers is characterized by fast pressurization, but the outlet airflow pulsation is large.

At present, there are businesses in the mainland and everywhere.

2.

Miniature servo air pump

The miniature air pump used for the third generation electronic sphygmomanometer-MWI electronic sphygmomanometer has stable pressurization and minimal outlet airflow pulsation; Can be used for servo control.

At present, there are only jinyidi technology co., ltd. and OKEN.

Seiko has patented micro servo air pump technology, which can be used as a high-tech micro servo air pump.

3. The second generation electronic sphygmomanometer adopts electronic control exhaust valve, which is characterized by servo control through software to keep the exhaust speed constant in order to improve the accuracy of blood pressure measurement.

At present, the companies that have this patent for electronically controlled exhaust valve and its servo control are: Kang Wang Health Products Co., Ltd. wolman series electronic sphygmomanometer.

Fourth, the software of electronic sphygmomanometer This is the core of electronic sphygmomanometer. Only a few 10 companies in the world can develop software suitable for mass production.

Roughly speaking, there are two in Chinese mainland: Shenzhen Jinyidi Technology Co., Ltd. and Tianjin Jiuan Electronics Co., Ltd.; There are three; Everything else is business.

There are some small developers, but because there is no mass production, the software and hardware can not be perfected and verified, and it is estimated that it is difficult to develop.

Five, mechanical slow exhaust valve

This is a slow exhaust valve of the first generation electronic sphygmomanometer, also called rubber exhaust valve, commonly known as "air core".

Its disadvantages are: 1.

For arms with different thicknesses, the exhaust speed is different; 2.

Under different pressures, the exhaust velocity is different; 3.

Rubber is easy to age, and with the passage of time, the exhaust speed will also change.

Six, electromagnetic quick exhaust valve

Both the first and third generation electronic sphygmomanometers adopted air valves for quick deflation.

There is nothing special about electromagnetic quick exhaust valve.

Controlling power consumption is its difficulty.

What problems should be paid attention to when using wrist electronic sphygmomanometer correctly?

It is often said that the electronic sphygmomanometer is not accurate, and the measured value is different every time.

There are two aspects to this problem: first, everyone's blood pressure changes greatly in one day.

Strictly speaking, people's blood pressure is different at every moment. It changes with the change of people's psychological state, time, season and temperature, as well as the difference of measuring position (arm or wrist) and posture (sitting or lying down).

Therefore, it is normal that the measured blood pressure value is different every time.

For example, due to nervousness and anxiety, the systolic blood pressure (that is, high pressure) measured in hospitals is generally 25 mm Hg ~ 30 mm Hg (.. 4 kPa ~ 4.0 kPa) higher than that at home, and some even differ by 50 mm Hg (6.67 kPa).

Second, the measurement method is incorrect.

The following three points should be paid attention to when measuring: firstly, the cuff height should be at the same height as the body position, the cuff hose should be placed at the brachial artery pulsation point, and the bottom of the cuff should be higher than the elbow1~ 2 cm; At the same time, the tightness of the cuff should be able to just insert a finger.

Secondly, be sure to keep quiet 10 minutes before measurement.

Finally, the time interval between the two measurements should not be less than 3 minutes, and the position and posture should be consistent.

To achieve these three points, it should be said that the measured blood pressure is accurate and objective.

Alternate measurement: measure blood pressure with mercury sphygmomanometer for the first time, measure blood pressure with electronic sphygmomanometer for the second time and measure blood pressure with mercury sphygmomanometer for the third time after resting for 3 minutes.

Take the average value of the first time and the third time as the measured value. Compared with the measured value of the electronic sphygmomanometer, the difference should generally be less than10mmhg (1.33kPa).

You can safely use an electronic sphygmomanometer that meets this condition.

The first step of measurement: turn your palm to the right.

On the wristband, make the wristband at the same height.

Step 2: Press the start/stop key to measure. After the screen is displayed, press the function key to switch between users ① and ②.

Step 3: automatically pressurize and inflate to 180mmhg, and automatically pressurize if the blood pressure is too high.

Step 4: The pressure gradually drops. When the pulse is detected, the heart flashes synchronously with the pulse.

Step 5: After the test is completed, quickly deflate, and the screen automatically displays the high pressure, low pressure and heartbeat values.