Systems and methods for identifying portions of a physiological signal usable for determining physiological information
First Claim
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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.
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Abstract
A patient monitoring system may determine portions of a PPG signal that correspond to artifacts, to a baseline shift that exceeds a threshold, or to a pulse-to-pulse variability that exceeds a threshold. The patient monitoring system may identify a contiguous portion of the PPG signal that does not include the determined portions. The contiguous portion of the PPG signal may be used to determine physiological information.
166 Citations
20 Claims
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1. A method for determining physiological information from a PPG signal, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer-readable storage medium interfaced with a pulse oximeter monitor for use in determining physiological information from a PPG signal received from a pulse oximetry sensor, the non-transitory computer-readable medium having computer program instructions recorded thereon for:
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determining a presence of an artifact in a first portion of the PPG signal; determining a presence of a baseline shift that exceeds a baseline shift threshold in a second portion of the PPG signal; determining a pulse-to-pulse variability that exceeds a variability threshold in a third portion of the PPG signal; identifying 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; and determining the physiological information based on the contiguous portion; and indicating on the pulse oximeter monitor the physiological information. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A patient monitoring system comprising processing circuitry a pulse oximeter monitor configured to:
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determine a presence of an artifact in a first portion of a PPG signal; determine a presence of a baseline shift that exceeds a baseline shift threshold in a second portion of the PPG signal; determine a pulse-to-pulse variability that exceeds a variability threshold in a third portion of the PPG signal; and identify 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; determine physiological information based on the contiguous portion; and indicate on the pulse oximeter monitor the physiological information. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification