14.4 : 测量血压的部位

The brachial and popliteal arteries are widely preferred when measuring blood pressure.

The brachial artery is a major upper-arm blood vessel that extends from the axillary artery and terminates at the cubital fossa.

The popliteal artery, a significant blood vessel in the leg that continues from the femoral artery and passes through the popliteal fossa, is preferred when the patient's brachial artery is inaccessible.

The systolic pressure usually remains higher in the popliteal artery due to the calf muscle's high resistance caused by arterial calcification.

Contraindications for measuring blood pressure at popliteal and brachial areas include IV cannulation, arterioventricular fistula, limb injuries, mastectomy, and burns.

Conversely, the palpation technique can also help monitor blood pressure.

To measure blood pressure using the palpation method, gradually inflate the cuff until the radial pulse disappears. Note this pressure. Deflate the cuff and wait for thirty seconds, and then reinflate it to 30mmHg above the noted pressure. The pressure at which the pulse reappears during deflation is the systolic pressure, and while continuing to deflate, the disappearance of the pulse is the diastolic pressure.