ACI™ Technology is a new patented noninvasive method for determining the elastic recoil pressure of an artery. The recoil pressure is a measure of the work done by the artery when it is distended to regulate blood flow, and is expressed as an Arterial Compliance Index (“ACI”) in pressure units of mmHg. The ACI correlates to blood pressure, artery stiffness, distension, blood flow, flow resistance, and is compared to a baseline index for a particular artery in issue. Current methods of measuring arterial stiffness are technically demanding, time consuming, costly, and limited in scope. The ACI™ Technology offers a novel and advanced method for evaluating artery stiffness and hemodynamics within the primary-care setting and in hospital practice.