Method for detection of aberrant tissue spectra
First Claim
1. A method for correcting light shunting, comprising:
- emitting light at three or more wavelengths from at least one emitter of a sensor into a patient'"'"'s tissue, wherein the three or more wavelengths includes a first wavelength that is not used to determine a physiological characteristic of the patient;
detecting the light with at least one detector of the sensor;
comparing the intensity of the detected light at the first wavelength to a threshold;
determining the amount of light shunting between the at least one emitter and the at least one detector based on the comparison; and
processing the detected light at one or more of a second wavelength or a third wavelength to compensate for the amount of light shunting.
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Accused Products
Abstract
A method is provided for determining contact of a sensor with a patient'"'"'s tissue. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining if the sensor is in contact with the patient'"'"'s tissue based on the comparison. In addition, a method is provided for determining the amount of light shunting during operation of the sensor. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining the amount of light shunting based on the comparison.
34 Citations
20 Claims
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1. A method for correcting light shunting, comprising:
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emitting light at three or more wavelengths from at least one emitter of a sensor into a patient'"'"'s tissue, wherein the three or more wavelengths includes a first wavelength that is not used to determine a physiological characteristic of the patient; detecting the light with at least one detector of the sensor; comparing the intensity of the detected light at the first wavelength to a threshold; determining the amount of light shunting between the at least one emitter and the at least one detector based on the comparison; and processing the detected light at one or more of a second wavelength or a third wavelength to compensate for the amount of light shunting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A patient monitor, comprising:
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a port configured to connect to a sensor; and a processor configured to receive signals from the port and to use the signals when executing an algorithm configured to compare an intensity of a first wavelength of detected light to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of a patient, and wherein the processor is also configured to execute a second algorithm configured to determine an amount of light shunting between at least one emitter of the sensor and at least one detector of the sensor based on the comparison, and wherein the processor is configured to process the signals related to one or more other wavelengths of detected light to compensate for the amount of light shunting. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A patient monitoring system, comprising:
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a sensor comprising; an emitter configured to emit light at three or more wavelengths into a patient'"'"'s tissue; and a detector configured to detect the light; and a monitor configured to execute an algorithm configured to compare an intensity of a wavelength of detected light to a threshold, wherein the wavelength is not used to determine a physiological characteristic of the patient, and a second algorithm configured to determine an amount of light shunting between the emitter and the detector based on the comparison, and to process the detected light at one or more other wavelengths of the three or more wavelengths to compensate for the amount of light shunting. - View Dependent Claims (19, 20)
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Specification