Patent ID: 9198616
Filing Date: 2015-12-01
Classification: A61B,G01N

Abstract:
1. A method for determining physiological information, comprising: obtaining a photoplethysmographic (PPG) biosignal from a subject at least in part using a signal acquisition unit; decomposing, using a signal processor, the PPG biosignal at least in part using wavelet transform analysis; identifying, using the signal processor, a locus of points on a transform surface constructed by the wavelet transform analysis that define a path displaced from a ridge of a band; determining, using the signal processor, wavelet phase information based at least in part on the wavelet transform analysis; and determining, using the signal processor, based at least in part on the locus of points that define the path and the wavelet phase information at least one of: timing of individual breaths of the subject, respiration rate of the subject, presence of an abnormal breathing pattern, timing of individual heart beats of the subject, heart rate of the subject, and presence of heart beat anomalies.