What is the calibration method of mercury sphygmomanometer?

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2. Remove mercury oxide. (black in the display tube)

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3. Clean the indicator tube.

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4. Keep pores unobstructed.

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When the mercury column is broken or blistered, the mercury should be filtered repeatedly. When the mercury leaks, the mercury oxide should be removed. If the zero position is not correct, the indicator tube should be cleaned. If the sensitivity is poor, the air hole should be kept clear.

Extended data:

Mercury sphygmomanometer is a kind of sphygmomanometer, which is mainly composed of mercury. It was born in England in 1928. The earliest sphygmomanometer was used to measure the blood pressure of horses, and later it was used to measure the blood pressure of people.

Due to the direction of blood flow, the blood pressure measured by the left hand and the right hand is usually somewhat different; Usually, the blood pressure of the right hand is slightly higher than that of the left hand, but the difference of 10~20mmHg is normal. However, the high measured data shall prevail when recording. If the difference between hands is more than 40 ~ 50mmhg, it may be blood vessel blockage. It is best to consult a doctor to find out the reason.

It is not appropriate to measure blood pressure only once. You should measure your blood pressure several times a day and record it in order to know the changes of your blood pressure during the day.

It is best to take your blood pressure when you are relaxing at home, because some people feel nervous when taking blood pressure in medical institutions, which leads to an increase in blood pressure. Medically called "white hypertension", measuring blood pressure at home can overcome this situation.

The traditional mercury sphygmomanometer will be affected by thermal expansion and cold contraction, and the zero position should be calibrated once every six months on average.

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