Is the electronic blood pressure monitor accurate? Why is blood pressure measured differently?

Do you think mercury sphygmomanometers are accurate? There is no absolute thing in the world, the value of blood pressure measured by ordinary blood pressure monitors (including mercury blood pressure monitors) is only an approximate value of your time point, you can not do this value without a little error, generally you can only judge whether your blood pressure is normal according to the measured value, and can not be conclusive, electronic blood pressure monitor needs you to continue to observe, a certain point is not necessarily your real blood pressure, because people's blood pressure is changing all the time! Generally, it is best to test before meals in the morning, and you can observe your blood pressure by continuing to measure it every day.

Electronic sphygmomanometers are accurate within the scope specified in their own products and should be treated as such.

However, electronic blood pressure monitors, like mercury blood pressure monitors (pressure gauges), need to be calibrated regularly, and the calibration cycle is generally one year.

The factors that affect the accuracy of the measurement results of an electronic blood pressure monitor are:

1. The first generation (mechanical fixed speed exhaust valve) is usually considered to be inaccurate due to the use of rubber valves that are easy to age; This technology has been phased out by mainstream electronic sphygmomanometer manufacturers;

2. The software of electronic sphygmomanometers of different manufacturers is completely different, and the stability and accuracy of their measurement results are also very different;

3. Not calibrated, or not regularly calibrated, for reasons above;

4. Improper use: The correct way to use it is to keep the cuff (or wristband, finger ring) in the same horizontal position as the heart during the test, and pay attention to the ...... of sitting still and being emotionally stable;

The above phenomena are combined, giving people the impression that the electronic sphygmomanometer does not match the blood pressure value measured by the doctor, and the electronic sphygmomanometer is not accurate. In fact, according to irrigation regulations, before obtaining a production license, electronic blood pressure monitors must go through clinical trials. The clinical trials of the Ormon electronic blood pressure monitor were conducted in China-Japan Friendship Hospital, Friendship Hospital, and Fuwai Hospital.

The results showed that there was no significant difference between the blood pressure value measured by the electronic blood pressure monitor and the doctor's stethoscope. (4) Regarding the measurement error of the upper arm electronic sphygmomanometer and the wrist electronic sphygmomanometer, the thickness of the arterial blood vessels at the upper arm and the arterial blood vessels at the wrist, that is, the diameter is almost the same, generally the diameter of the arterial blood vessels at the upper arm is 6mm, and the diameter of the arterial blood vessels at the wrist is up to 5mm. Moreover, the electronic sphygmomanometer is the same from the design accuracy to the manufacturing accuracy, and the inspection specifications of each unit are also the same when leaving the factory.

Therefore, in principle, there is no significant error. View the original post

Is the measurement accuracy of the electronic blood pressure monitor? Why tell you why?

It is certain that the electronic sphygmomanometer is inaccurate in measuring blood pressure, and all medical institutions in the world do not use electronic sphygmomanometers for clinical diagnosis for a long time, and the national measurement regulations unified textbook page 12 clearly points out that hypertension and the elderly are not suitable for using electronic sphygmomanometers, because the principle of electronic sphygmomanometer oscillometer to calculate blood pressure is defective, and there is an uncertain error in measuring blood pressure with an electronic sphygmomanometer for the elderly.

Blood pressure monitoring is an important part of the daily management of hypertensive patients, and with the popularization of electronic sphygmomanometers, it is becoming more and more convenient for every hypertensive patient to monitor blood pressure, but there are also some doubts.

Some people use electronic blood pressure measurement to be accurate, and some people are not accurate, which varies from person to person. This is because the electronic sphygmomanometer uses the oscillometric method to calculate the blood pressure value, not to measure it. After studying Accutension Stetho Zhihu blood pressure quasi-knowledge, this cause was known.

Electronic sphygmomanometers use oscillometric methods to calculate blood pressure, not measure it. The acquisition of this algorithm relies on the data obtained from large-scale population measurement for statistical analysis, and the algorithms of different manufacturers are not uniform. Such an algorithm based on statistical laws calculates blood pressure values, and the measurement results are relatively accurate for individuals whose blood pressure change laws are close to statistical laws. For individuals whose blood pressure changes are significantly different from the statistical regularity, the measurement results will be more biased.

Whether the blood pressure value of the measured individual conforms to the statistical law of the oscillometric method cannot be determined in advance, so some people will not be able to use an electronic blood pressure monitor. Therefore, doctors use auscultation to measure blood pressure accurately.

The US FDA approved the world's first mobile phone auscultation blood pressure monitor.

(2) The posture at the time of measurement also has an effect on the measurement result. The results of the study showed that for every 10 cm increase in the measurement position compared to the height of the heart, the blood pressure value decreased by about 8 mmHg, and for every 10 cm decrease in height, the blood pressure value increased by about 8 mmHg. (3) The relationship between electronic sphygmomanometer and medical mercury column sphygmomanometer.

The mercury column sphygmomanometer uses the Coriolis sound method, and the electronic sphygmomanometer uses the oscillometric method, the Coriolis sound method is used by the doctor to listen to the sound of blood flow in the blood vessels, and the oscillometric method is to measure the vibration of the blood vessel wall when the blood flow is measured; Although the measuring principle is different, the test results are theoretically the same. In fact, the Coriolis method sometimes has a large error because the speed of hearing reaction varies from doctor to doctor, and sometimes because the blood pressure reading is not immediately noted down at the time of measurement. Therefore, each doctor's measurement will also produce errors, and the electronic sphygmomanometer lines up the differences between people, in addition, doctors often omit some errors and take the whole number.

For example: 128mmHg, 131mmHg, doctors read it as 130mmHg. The electronic sphygmomanometer is to show what value is measured, and some users report that it is always low when measuring at home, and the blood pressure is high when you go to the hospital to measure it, which is called white-clothed hypertension.

That is to say, in front of the doctor in the hospital, there will be a certain degree of uneasiness, tension and mental pressure, so that the blood pressure will rise, and the more relaxed Huajiang at home, the lower the blood pressure, which is the true reflection of the human blood pressure. View the original post

Preface: To measure blood pressure at home, electronic sphygmomanometer is also very accurate. Hypertension is one of the common chronic diseases in clinical practice, which is mainly divided into primary and secondary, and 90% of them are essential hypertension.

If you are diagnosed with high blood pressure, regardless of whether the symptoms appear or not, you should choose the antihypertensive medication that is suitable for you according to the doctor's advice, and at the same time measure your blood pressure regularly, a home electronic blood pressure monitor is a good choice.

It is relatively accurate to measure blood pressure at home, and the body's blood pressure fluctuates several times a day. Even the hospital's equipment for measuring blood pressure cannot measure fat value at all times. In addition, a number of domestic and foreign studies have been investigated, and the results show that the measurement results of electronic sphygmomanometer and mercury sphygmomanometer are relatively consistent if operated correctly.

In particular, there is little difference in systolic pressure measurements. However, it should be noted that the blood pressure values read by the two blood pressure monitors are different, but this is based on the change in the pulse of the upper arm artery.

The heartbeat should be stabilized before the measurement. Heart rate has a big impact on blood pressure, and the faster the heart rate, the higher the blood pressure. Therefore, it is necessary to rest quietly for 5-10 minutes before the measurement, adjust your mood and calm your mind.

To ensure the accuracy of blood pressure measurement, do not talk, eat, or walk while taking the measurement, and keep the measuring arm in the same position as the heart. At the same time, when measuring blood pressure, the cuff should be spaced finger width apart.

When you test your blood pressure at home, you should test it every 1-2 minutes, and then record the data each time, and measure the results an average of 3 times after the measurement. If the results of the three measurements are very different, the results of the first measurement are excluded and the results of the last two measurements are averaged. As long as you can do this well, you can basically ensure the accuracy of the measurement results and achieve the purpose of checking blood pressure.

In addition, it is necessary to know the difference between blood pressure measurement and hospital blood pressure measurement standards and judgment standards.

If the quality of the household electronic blood pressure is qualified, the measurement value of the home electronic blood pressure monitor can be trusted. The use of home electronic sphygmomanometer should be standardized: first, the person being measured is required to sit in a quiet state and rest for 5 minutes, expose the right upper limb as much as possible, and wrap the cuff.

Attention should also be paid to the position of the cuff and the position of the sphygmomanometer to be flush with the level of the heart, and the use of a home electronic sphygmomanometer should be measured multiple times to average the results. Try to use an AC power sphygmomanometer because the AC power supply is more stable, and the measurement results will be more reliable.

An electronic sphygmomanometer is a medical device that uses sensing technology and microcomputer technology to work together, and has high sensitivity.

It is very accurate, and many people will buy a blood pressure monitor at home for convenience. It's very convenient, and the end result is very accurate.

Blood pressure is measured at home, and the blood pressure monitor is also very accurate. Hypertension is one of the common chronic diseases in clinical medicine, which is mainly divided into primary and secondary, and 90% of them are hypertension. If high blood pressure is diagnosed, regardless of whether the disease occurs or not, you need to choose the appropriate blood pressure lowering drugs according to the doctor's advice, and at the same time, you need to measure your blood pressure regularly, and home blood pressure monitors are a good choice.

It is relatively accurate to measure blood pressure at home, and the human body's blood pressure fluctuates several times a day. Even the equipment used to measure blood pressure in hospital outpatient clinics cannot accurately measure body fat at all times. In addition, a number of scientific studies have been conducted in various countries around the world, and the results have shown that the measurement values of blood pressure monitors and mercury blood pressure monitors are more consistent when properly operated.

In particular, there is basically no difference in the measurement of the closing pressure. However, it should be noted that the basic principle of the high and low blood pressure values loaded by the two blood pressure monitors is different, but this is based on the change of the arterial pulse of the arm.

The heart rate should be stabilized before accurate measurements. The heartbeat has an effect on the blood pressure value, and the faster the heartbeat is, the higher the blood pressure value. Therefore, before accurate measurement, you should rest quietly for 5-10min to regulate your mood and calm down.

To ensure accurate blood pressure measurements, do not speak, eat, or walk during the measurement, and keep your arms in the same area as your cardiovascular system. At the same time, when measuring blood pressure, the blood pressure cuff should be spaced finger width apart.

Usually, when the blood pressure value is measured at home, it should be measured once at an interval of 1-2 minutes, and then the data should be recorded each time, and the average value should be measured 3 times after accurate measurement. If the conclusions of the three measurements are very different, it is necessary to remove the conclusions of the first measurement and take the final two conclusions to carry out the average measurement. As long as this can be done well, the accuracy of the measurement value can be basically ensured, and the purpose of checking blood pressure can be achieved.

In addition, it is also necessary to understand the difference between blood pressure measurement and hospital blood pressure measurement specifications and judgment standards.

Electronic sphygmomanometers are very accurate, and the Chinese guidelines for the prevention and treatment of hypertension recommend that people use electronic sphygmomanometers for daily blood pressure level monitoring.

In fact, it is not very accurate, because the electronic blood pressure monitor does not have ultrasonic technology, it is not able to detect changes in your body, it can only be seen through the surface.

It should be accurate, so that you can measure your blood pressure well, basically there will be no error, and the current electronic instruments are very accurate.

Electronic sphygmomanometer standard.

Some people worry that electronic blood pressure monitors are inaccurate, but this is actually a misconception. When measuring blood pressure using the Koolkoff method, because each doctor's hearing response speed is different, sometimes there will be a large error because the blood pressure reading is not written down immediately at the time of measurement; Some doctors often omit some errors and take the whole number, for example, 128 mm Hg and 131 mm Hg, which doctors read as 130 mm Hg.

Electronic blood pressure monitors are different, showing whatever value is what it is. According to the regulations, before obtaining a production license, the electronic sphygmomanometer must go through clinical trials, so its accuracy is no problem.