Optical noninvasive monitoring of skin blood pulsations.
Time-resolved detection and analysis of skin backscattered optical signals (remission photoplethysmography or PPG) provide rich information on skin blood volume pulsations and can serve for reliable cardiovascular assessment. Single- and multiple-channel PPG concepts are discussed. Simultaneous data flow from several locations on the human body allows us to study heartbeat pulse-wave propagation in real time and to evaluate vascular resistance. Portable single-, dual-, and four-channel PPG monitoring devices with special software have been designed for real-time data acquisition and processing. The prototype devices have been clinically studied, and their potential for monitoring heart arrhythmias, drug-efficiency tests, steady-state cardiovascular assessment, body fitness control, and express diagnostics of the arterial occlusions has been confirmed.
Spigulis
Janis
J
Bio-optics Group, Institute of Atomic Physics and Spectroscopy, University of Latvia, Raina Boulevard, 19, Riga, LV-1586, Latvia. janispi@latnet.lv
D000293:Adolescent; D000328:Adult; D000465:Algorithms; D000818:Animals; D001157:Arterial Occlusive Diseases / Q000175:diagnosis* / Q000503:physiopathology; D001783:Blood Flow Velocity; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D017156:Photoplethysmography / Q000295:instrumentation* / Q000379:methods*; D011673:Pulsatile Flow; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012867:Skin / Q000098:blood supply* / Q000503:physiopathology*