1. The detector, such as the probe of a stethoscope, should detect Korotkoff sounds at the fluctuation point of the upper arm brachial artery;
2. The width of the cuff is not less than 14cm to ensure that the blood flow can be effectively stopped above the measurement position after sufficient pressure;
3. The subject is sitting or lying down to ensure that the detector and the heart are at the same level;
4. For adults, judge the systolic blood pressure according to the first sound of Korotkoff sound, and judge the diastolic blood pressure according to the fifth phase disappearance sound; for children and some adults without disappearance sound, judge according to the "diaphonic change" when the slap sound changes to the cover sound Diastolic blood pressure
5. The subject should sit still for more than 5 minutes in a quiet room;
6. Measure the blood pressure twice in a row with an interval of more than 2 minutes, and take the average value as the measurement result. If the difference between the two measurements is more than 5 mmHg, the third blood pressure should be measured, and the average of the three blood pressure measurements should be taken The value is the measurement result.
