A novel SVD-based method effectively reduces motion artifacts in PPG signals, enabling reliable SpO2 measurement.
Artifact free photoplethysmographic (PPG) signals, obtained with red and infrared (IR) optical sources and detectors are necessary for non-invasive estimation of oxygen saturation (SpO 2 ) in arterial blood. Movement of a patient corrupts the PPGs with motion artifacts, resulting in large errors in the computation of SpO 2 . This paper presents a novel singular value decomposition (SVD) based method to reduce motion artifacts from corrupted PPG signals. Test results on a prototype incorporating the proposed SVD technique show that stable and reliable SpO 2 measurement is achieved even when PPGs are distorted by motion artifacts, thus establishing the efficacy of the proposed method.
Reddy et al. (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: