Effect of loose cuff on blood pressure measurement

Blood pressure measurement

is based on the principle that blood flow in the brachial artery is blocked by the pressure of the cuff, and then the blood pressure value is judged by feeling the blood flow in the brachial artery. If the cuff is too loose during measurement, higher pressure is needed to block the blood flow in the brachial artery during inflation, resulting in high blood pressure.

Therefore, when measuring blood pressure, attention should be paid to adjusting the tightness of the cuff. It should not be too tight or too loose. Generally, it is appropriate to put 1-2 fingers in.