ARTERIAL COMPLIANCE INDEX
ARTERIAL STIFFNESS AND HEMODYNAMICS"
ACI TECHNOLOGY
ACI Technology is a new noninvasive method for determining artery compliance, the ability of an artery to expand and contract in response to changes in blood pressure. Using the ACI method, artery compliance is a measure of the blood pressure held by the artery when it is distended during each heartbeat to regulate blood flow and is expressed as an Arterial Compliance Index (“ACI”) in pressure units of mmHg. The ACI is associated with blood pressure, blood flow (conductance), flow resistance, and with cardio-renal autoregulation flow dynamics. Among many other applications include cardiovascular and hypertension studies.
“Alteration of the mechanical properties of arteries is, without doubt, of considerable prognostic significance for many patients.”
Arterial Stiffness: Clinical Relevance, Measurement and Treatment
Clinical Science (2007) 113, 157–170 (Printed in Great Britain) doi:10.1042/CS20070080
HOW IT WORKS
The Arterial Compliance Index (ACI) is calculated using systemic blood pressure and peak blood flow velocities of the artery signature waveform. Peak-systolic and end-diastolic blood velocities of the artery are measured while blood pressure measurements are taken at repeated intervals and averaged to best coincide with the flow measurement. The ACI stored / recoil pressure is then calculated and displayed.
Real time indices:
BLOOD PRESSURE
STIFFNESS
DISTENSION
BLOOD FLOW
FLOW RESISTANCE
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