How to use mercury sphygmomanometer Brief introduction to the use of mercury sphygmomanometer

1. Before measuring blood pressure with a mercury sphygmomanometer, the subjects should not smoke, drink coffee or empty their bladder for half an hour. Don't sit in a chair with a backrest in a quiet environment, and rest quietly for at least five minutes.

2, can measure the patient's sitting blood pressure, can also measure the supine blood pressure. Candidates' upper limbs are bare and straight, slightly abduction. The elbow is at the same level as the heart, and the cuffs are evenly attached to the skin and wrap the upper arm. The lower edge of the cuff is about 2.5 cm above the cubital fossa, and the center of the cuff is located on the surface of the brachial artery. After the examiner touches the pulsation of the brachial artery, put the stethoscope at the pulsation of the brachial artery, inflate the cuff, and auscultate while inflating, then deflate slowly after the pulsation of the brachial artery disappears, and then inflate upward for 30mm Hg to observe the blood pressure. The first sound you hear is called high pressure, and when the sound disappears, it is called low pressure. If you have blood pressure, you need to measure it twice, with an interval of 1 to 2 minutes. If the difference between the two blood pressure values exceeds 5 mm Hg, you can measure the blood pressure three times and take the average as the result of this blood pressure.