Patent ID: 9392975
Filing Date: 2016-07-19
CPC Classification: A61B,G06K

Claim Text:
1. A method for processing a physiological signal, comprising: obtaining a photoplethysmograph (PPG) signal from a pulse oximetry sensor; selecting, using a pulse oximeter, a current portion of the PPG signal for analysis; identifying, using the pulse oximeter, a plurality of signal peaks in the current portion of the PPG signal; determining, using the pulse oximeter, a peak characteristic for each of the plurality of signal peaks, wherein the peak characteristic comprises one or more of peak amplitude, trough amplitude, and interpeak distance; comparing, using the pulse oximeter, the peak characteristic for each of the plurality of signal peaks to each other to determine if the current portion of the PPG signal is consistent; and responsive to determining that the current portion of the PPG signal comprising a plurality of peaks is consistent, determining, using the pulse oximeter, respiration rate based at least in part on the current portion of the PPG signal.