Using the system identify theorem for constructing the dynamic compliance of the brachial artery

A noninvasive measurement technique with oscillometry, system identify, and the related measured circuits is investigated to detect the dynamic compliance of brachial artery. In oscillometry, oscillation amplitudes (OAs) embedded in the cuff pressure are effected by the arterial characteristic, body tissue, and cuff characteristic. In cuff deflation, pressure transducer and micro flower meter were used to detect the variation of cuff pressure and volume. A system identify theorem was used to reconstruct the cuff model. Using the cuff pressure and OAs, the arterial volume change was calculated under the different transmural pressure. This measurement system also detected the systolic and diastolic pressure, simultaneously. Therefore, the dynamic pressure-volume (P-V) curve of artery was made.