Identification of brachial artery characteristic using a cuff for noninvasive detection of coronary artery disease.
How could a cuff cause a peripheral artery to enter its resonance mode? How could the arterial oscillations be used to evaluate the arteries and to diagnose coronary artery disease (CAD)? This paper answers. A conceptual model representing the role of cuff-artery connection to produce a step-like (sharpened) pressure stimulator is also introduced. The arterial dynamic response is recorded noninvasively in the form of arterio- oscillo-gram (AOG) via an accelerometer. Only, the big oscillatory parts of AOG are used to assess the arterial structure. Due to CAD correlation with peripheral arteriosclerosis, the CAD can also be diagnosed by analyzing AOG peaks. For every person of 51 samples including 22 CAD, 22 normal and 7 heart murmur (HM) patients, the mean of five largest peak durations is calculated. The more severity of CAD causes the less duration time. Hence, simply, by defining a threshold of 9.25 ms, two CAD and non-CAD groups were classified with accuracies of 77% (17/22), and 82% (17/22 for normal, and 7/7 for HM), respectively. This simple noninvasive method mainly aims the vascular characteristics evaluation, thus it does not have the usual limitations of other CAD detection methods.
Pouladian
Majid
M
Biomedical Engineering Faculty, Science and Research Campus of Azad University, Tehran, Iran.