![]() When the pressure in the cuff falls to the systolic pressure level, pulsatile blood flow begins to re-establish. The cuff is then gradually deflated while continuing to auscultate over the brachial artery. At this point, the pressure of the cuff exceeds the systolic pressure, and auscultation over the brachial artery reveals no sound due to complete obstruction of flow. To measure an individual’s blood pressure, the deflated cuff is placed around the arm and inflated sufficiently to occlude arterial flow. This method utilizes a sphygmomanometer, a device comprised of an inflatable cuff connected to a pressure gauge (generally a column of mercury). The original method of determining blood pressure via the auscultation of Korotkoff sounds continues to be a mainstay in blood pressure measurement.
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