Non-Invasive Ankle Brachial Index Measurement Based on Pulse Wave

摘要

To find a new algorithm for non-invasively detecting ankle brachial index (ABI) by synchronous acquisition of four limbs pulse wave signals and cuff pressure-wave signals based on waveform character method and amplitude coefficient method in priority rule. The turning point was judged in certain range by calculating the difference of adjoining pulse waves and their relative ratio based on priority rule. The method settled the problem of misjudgement of the turning point before systolic blood pressure (SBP) and around average pressure. Many cases analyses and lots of clinical tests proved the algorithm effective and reliable. ABI is a handy and dependable predictor of atherosclerosis; it is associated with conventional risk factors such as age, blood pressure, and so on.