1. Keep the room quiet, and the room temperature should be around 20.
2. Before the measurement, the subject should relax and take a rest for 20-30 minutes to empty the bladder, do not drink alcohol, coffee or strong tea, and stop smoking.
3. The patient can take a sitting or lying position, with his feet flat, his elbows and forearms are placed comfortably on a position approximately parallel to the heart
4. Turn on the automatic switch sphygmomanometer box and place it on a stable place next to the patient's limbs and make the mercury column vertical to zero. 5. Let the patient take off the sleeve to expose the right upper arm. If the sleeve is thin and wide, it can be rolled up to the armpit.
6. When wrapping the air sleeve of the sphygmomanometer, first squeeze out the air in the sleeve, and then wrap it around 2-3 cm from the elbow joint of the right upper arm. It should not be too loose or too tight. After touching the brachial artery on the inside of the elbow, place the stethoscope ear Put it on the brachial artery and measure it. 7. Close the air valve on the balloon. The measurer's sight should be on the same level as the scale on the mercury column to observe the height of the mercury column. Quickly inflate and wait until the radial artery pulse disappears. Repressurize 4kPa (30mmHg) to stop the inflation, slightly open the air valve to make the mercury slowly drop. When you hear the sound of the first sound pulse beating, it becomes "high pressure", that is, the systolic pressure. Continue to deflate the mercury slightly, slowly When it drops slowly to a certain mark on the mercury column, the sound suddenly becomes weaker or disappears when it becomes "low pressure", that is, diastolic blood pressure.
Precautions
