Relationship between blood pressure and finger photoplethysmographic waveform during oxygen desaturation test: a model fitting approach.
A modified 3-element windkessel model was applied to study the relationship between brachial arterial blood pressure and the photoplethysmographic waveform from pulse oximeters. Data were recorded from 12 healthy volunteers who underwent the oxygen desaturation study. During about 30 minutes recording period, the SpO2 value was regulated down till about 70%. After preprocessing, singular value decomposition (SVD) algorithm was then used to get the best fit of the model parameters.


RESULTS
the fitting error (RMSE) was 1.07 +/- 0.48 mmHg. The time constant of the model shown significant difference between the highest and the lowest saturation group.
Weng
J
J
Institut für Medizintechnik, Universität zu Lübeck, Deutschland. weng@imt.uni-luebeck.de
Matz
H
H
Gehring
H
H
Konecny
E
E
D000328:Adult; D000465:Algorithms; D001794:Blood Pressure / Q000502:physiology*; D005385:Fingers / Q000098:blood supply*; D006801:Humans; D008962:Models, Theoretical; D010092:Oximetry; D010100:Oxygen / Q000097:blood*; D017156:Photoplethysmography; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted
D010100:Oxygen