Principle of electronic sphygmomanometer
Electronic sphygmomanometer is a medical device that utilizes modern electronic technology and the principle of indirect blood pressure measurement. electronic sphygmomanometer arm, wrist points; electronic blood pressure meter has become the main tool of the family to measure their own blood pressure, electronic sphygmomanometer is also more and more used in hospitals and other health care institutions, the following follow me to see the electronic sphygmomanometer principle for your reference.
Electronic blood pressure monitor is also increasingly used in hospitals and other medical institutions.
Principle of the electronic sphygmomanometer
The principle of the electronic sphygmomanometer uses the oscillometric method, which should be accurate in principle. Clinical validation of electronic sphygmomanometers is designed to use the auscultation method as a standard, using statistical methods. However, this does not mean that the results measured by the auscultation method using a mercury manometer are any more accurate than the measurements of an electronic sphygmomanometer. Of course, it would be wrong to assume that the measurements from an electronic sphygmomanometer are more accurate than those from auscultation with a mercury manometer.
The mercury column sphygmomanometer used by doctors in hospitals is only a tool for pressure measurement. The idea that a mercury sphygmomanometer is an accurate sphygmomanometer is one-sided, because a mercury sphygmomanometer is just a manometer, and the focus is on the doctor's auscultation through the stethoscope. Mercury column sphygmomanometers are generally banned in developed countries internationally in favor of manometers, but they must be calibrated once every 3 months because of the mechanical design of the manometer.
Nowadays, electronic blood pressure monitors have realized fully automatic intelligent measurement, and the measurement data can be automatically transmitted to the health management platform through the network, and the health data report will be generated and fed back to the user.
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The Principle of Electronic Blood Pressure Monitors
The auscultation method has inherent shortcomings: First, there is a debate about whether diastolic blood pressure corresponds to the fourth or the fifth phase, which leads to a large margin of error in the discrimination. The second is that by listening to the Koch sound to determine the systolic and diastolic blood pressure, the readings are affected by a series of factors such as the doctor's mood, hearing, ambient noise, and the subject's nervousness, so it is easy to introduce subjective errors, and it is difficult to standardize.
The electronic sphygmomanometer made by the principle of the auscultation method, although it realizes automatic detection, still has not completely solved its inherent shortcomings, that is, the error is large, the repeatability is poor, and it is easy to be interfered by noise. The vast majority of blood pressure monitors and automatic electronic sphygmomanometers use the oscillometric method to measure blood pressure indirectly. The oscillometric method measures blood pressure by establishing the relationship between systolic, diastolic, and mean pressures and the cuff pressure shock wave to identify blood pressure.
Principle of the electronic sphygmomanometer
Because of the stable correlation between pulse pressure oscillations and blood pressure, the blood pressure measured by the oscillometric principle is more accurate than that measured by auscultation in the application of home self-testing of blood pressure. And oscillometric method of blood pressure measurement in the cuff without pickup device, simple operation, anti-external noise interference ability is strong, but also can be measured at the same time the average pressure. In addition, some electronic sphygmomanometer cuff range of 22 ~ 32 cm, but some users of the arm circumference is greater than or less than the applicable range of the cuff, which may also be inaccurate in its blood pressure measurement. Therefore, it is important to have an appropriately sized cuff and to wear it in the correct position.
On the other hand, it is also important to fix a time of day to measure blood pressure. Some people measure their blood pressure by waking up early in the morning and at noon tomorrow. It is important to realize that human blood pressure varies relatively greatly throughout the day. Strictly speaking, a person's blood pressure is not the same at every moment, and it will also change with the person's psychological state, time, season, temperature changes, as well as the measurement of the different parts of the body, body position and so on. Therefore, the time for measuring blood pressure should be fixed every day. Doctors suggest that the best time to measure blood pressure should be early in the morning after getting up, when people are in a resting state, more truly reflect the level of blood pressure.
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