Detection method to minimize variability in photoplethysmographic signals for timing-related measurement.
Photoplethysmography (PPG) is a common optical technique used to monitor peripheral pulsation. Studies have shown that minimal variability in phase characteristics is critical to attain accurate estimation of timing-related measurements, such as heart rate and pulse transit time. Observed abrupt changes from baseline of these measurements have shown to identify abnormalities in clinical studies. This study investigates nominal fluctuations when different detection settings were used on the PPG signals. The results indicate that there can be differences in variations observed, and an appropriate detection setting can minimize phase-induced errors in clinical interpretation of timing-related physiologic measurements.
Foo
J Y A
JY
Biomedical Engineering Research Centre, Nanyang Technological University, 50, Nanyang Drive, Research Techno Plaza, 6th Storey, Xfrontiers Block, Singapore, 637. jong@ieee.org
Wilson
S J
SJ
D000328:Adult; D000465:Algorithms; D016477:Artifacts; D001794:Blood Pressure / Q000502:physiology; D001810:Blood Volume / Q000502:physiology; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004562:Electrocardiography / Q000379:methods; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D010092:Oximetry / Q000379:methods*; D017156:Photoplethysmography / Q000379:methods*; D011673:Pulsatile Flow / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013997:Time Factors