Method for detection of aberrant tissue spectra
First Claim
1. A method for determining contact of a sensor with a patient'"'"'s tissue, comprising:
- emitting light at three or more wavelengths 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;
comparing the intensity of the detected light at the first wavelength to a threshold; and
determining if the sensor is in contact with the patient'"'"'s tissue based on the comparison.
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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.
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Citations
22 Claims
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1. A method for determining contact of a sensor with a patient'"'"'s tissue, comprising:
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emitting light at three or more wavelengths 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; comparing the intensity of the detected light at the first wavelength to a threshold; and determining if the sensor is in contact with the patient'"'"'s tissue based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for correcting light shunting, comprising:
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emitting light at three or more wavelengths 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; comparing the intensity of the detected light at the first wavelength to a threshold; and determining the amount of light shunting between the at least one emitter and the at least one detector based on the comparison. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A patient monitor, comprising:
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an I/O port configured to connect to a sensor; a processor configured to receive signals from the I/O port and to use the signals when executing an algorithm configured to compare a wavelength of detected light to a threshold, wherein the wavelength is not used to determine a physiological characteristic of the patient, wherein the processor is also configured to execute an algorithm configured to determine if a sensor is in contact with the patient'"'"'s tissue based on the comparison.
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20. A sensor, comprising:
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one or more light emitting components configured to emit light at three or more wavelengths, wherein at least one of the wavelengths is not used to determine a physiological characteristic but is used to determine the sufficiency of contact between the sensor and the tissue of a patient; one or more light detecting components configured to detect the light emitted by the one or more light emitting components; and a sensor body upon which the one or more light emitting components and the one or more light detecting components are disposed. - View Dependent Claims (21)
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22. A sensor assembly, comprising:
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a sensor body 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 a wavelength of detected light to a threshold, wherein the wavelength is not used to determine a physiological characteristic of the patient, and an algorithm configured to determine if a sensor is in contact with the patient'"'"'s tissue based on the comparison.
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Specification