Principle of mercury sphygmomanometer

The principle of mercury sphygmomanometer is the most common and commonly used sphygmomanometer. The biggest difference between them is the measurement method, which is different because they adopt different design principles, namely Coriolis method and oscillometric method. Which one is more suitable for home use?

The principle of mercury sphygmomanometer is divided into artificial coriolis sound and electronic coriolis sound. Mercury sphygmomanometer adopts artificial Coriolis sound measurement method. When measuring, the cuff is mainly inflated and the pressure is measured by listening to Coriolis sound with a stethoscope. The height of the mercury column indicates the pressure in the air cannula, which can be transmitted to the arterial wall, pressurize the air cannula until the arterial wall can be closed, and then gradually depressurize the air cannula. When the air cuff pressure is just equal to the systolic blood pressure and the blood vessels are washed away, the stethoscope can hear the Coriolis sound. At this time, the cuff pressure is systolic, and the cuff pressure continues to decrease until the Coriolis sound disappears just below the diastolic pressure, thus measuring the diastolic pressure.

The measurement accuracy and reliability of mercury sphygmomanometer using Coriolis sound method are relatively high, but this measurement method needs professionals with good hearing and auscultation to use. Therefore, mercury sphygmomanometer is gradually replaced by simple electronic sphygmomanometer.

Which sphygmomanometer is more suitable as the traditional mercury sphygmomanometer with Korotkoff sound at home, and its accuracy and reliability are indeed higher than that of electronic sphygmomanometer. Mercury sphygmomanometer was popular in the past, and now many hospitals still use mercury sphygmomanometer to measure sphygmomanometer for patients. However, when using mercury sphygmomanometer, the mercury must be sufficient, and the mercury convex surface in the calibration tube should be just at the scale 0. After use, the switch must be turned off to prevent mercury leakage. Disadvantages are relatively heavy, inconvenient to carry, easy to appear silver leakage, rubber pad blockage, dirty inner wall and other obstacles. In addition, you need to use a stethoscope when using it, and people who are hard of hearing or do not understand auscultation cannot use it. The operation is complicated, and it is easy to cause poor hearing and eyesight and mercury pollution, so it is not recommended to be used as a home sphygmomanometer.

The oscillometric electronic sphygmomanometer is relatively light and suitable for home use at present, and its accuracy is not as good as that of mercury sphygmomanometer, but it has many functions, light design and convenient carrying and operation. Electronic sphygmomanometer has errors, as long as the error is not big, it is basically normal. When using, it should be operated correctly in strict accordance with the instructions to reduce errors.

Especially the same sphygmomanometer is suitable for people and not suitable for people, and mercury sphygmomanometer is generally not suitable for patients with poor hearing or auscultation; Wrist electronic sphygmomanometer is not suitable for patients with blood circulation disorder, diabetes, hyperlipidemia, hypertension, arteriosclerosis and peripheral circulation disorder. It is suggested that users and the elderly with the above diseases choose the upper arm electronic sphygmomanometer.

Wonderful recommendation:

Fruits that pregnant women can't eat Foods that pregnant women can't eat What fruits do pregnant women eat What are the precautions in the second trimester What are the benefits of pregnant women eating corn? What toothpaste is better for pregnant women? Can pregnant women apply olive oil to their stomachs?