System and method for mitigating interference in pulse oximetry
AssigneeNellcor Puritan Bennett LLC
InventorCarine Hoarau
Life of this patent
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Abstract
A pulse oximetry sensor adapted to emit light from an emitter proximate to a patient's tissue and detect a portion of the emitted light on a detector proximate to the tissue. The pulse oximetry system is adapted to acquire position data for the emitter and for the detector with one or more position indicators. The pulse oximetry system is adapted to process the position data to obtain a change in position of the emitter and the detector; and to process pulse oximetry measurements using the change in position to obtain a motion-corrected pulse oximetry data.
Claims18
A pulse oximetry system comprising;
- a sensor body having, an emitter, a detector, and one or more position indicators;
- one or more position receivers separate and external from the sensor body and configured to determine the respective positions of the position indicators;
- and
- a processor-based monitor configured to determine changes in absolute position in space of the sensor body based on the positions determined by the one or more position receivers and to process pulse oximetry measurements from the detector using the changes in absolute position to obtain a motion-corrected pulse oximetry measurement.
A pulse oximetry system comprising;
- a sensor body comprising;
- an emitter;
- a detector;
- one or more position indicators adapted to detect a change in position of at least one of the sensor body, the emitter, or the detector;
- and
- a processor-based monitor configured to process pulse oximetry measurements from the detector using the change in position to obtain a corrected pulse oximetry measurement, wherein the processor-based monitor utilizes a data bank of light scatter/absorbance probability as a function of an optical path length to obtain the corrected pulse oximetry measurement.
A tangible machine readable medium comprising:
- code for emitting light from an emitter proximate to a patient's tissue;
- code for detecting a portion of the light on a detector proximate to the tissue;
- code for acquiring three-dimensional data for the emitter or for the detector with one or more position indicators;
- code for processing the three-dimensional data to determine if there has been a change in position of the emitter or the detector;
- code for processing pulse oximetry measurements from the detector;
- and
- code for correcting the pulse oximetry measurements based at least in part on the change in position of the emitter or detector utilizing a data bank of light scatter/absorbance probability as a function of the optical path length.
A method for performing pulse oximetry comprising the acts of:
- emitting light from an emitter proximate to a patient's tissue;
- detecting a portion of the emitted light on a detector proximate to the tissue;
- acquiring three-dimensional data for the emitter and for the detector with one or more position indicators;
- processing the three-dimensional data to determine if there has been a change in position of the emitter or the detector;
- processing pulse oximetry measurements from the detector;
- and
- correcting the pulse oximetry measurements based at least in part on the change in position of the emitter or the detector by utilizing a data bank of light scatter/absorbance probability as a function of an optical path length.
Dependencies are inferred from the claim text.