Patent ID: 9179876
Filing Date: 2015-11-10
Classification: A61B

Abstract:
1. A method for determining physiological information from a PPG signal, the method comprising: receiving at an input of a pulse oximeter monitor the PPG signal generated by a pulse oximetry sensor; determining, using a pulse oximeter monitor, a presence of an artifact in a first portion of the PPG signal; determining, using the pulse oximeter monitor, a presence of a baseline shift that exceeds a baseline shift threshold in a second portion of the PPG signal; determining, using the pulse oximeter monitor, a pulse-to-pulse variability that exceeds a variability threshold in a third portion of the PPG signal; and identifying, using the pulse oximeter monitor, a contiguous portion of the PPG signal that does not include the first portion, the second portion, and the third portion, wherein the contiguous portion is at least a minimum length; determining, using the pulse oximeter monitor, the physiological information based on the contiguous portion; and indicating on the pulse oximeter monitor the physiological information.