Pathlength-Corrected Medical Spectroscopy
First Claim
1. A sensor comprising:
- an emitter capable of transmitting one or more wavelengths of light of one or more intensities;
a detector capable detecting the one or more wavelengths of light,wherein the emitter and the detector being positioned a distance of 2 mm-5 mm apart; and
a memory associated with the sensor, wherein the memory comprises data relating to the one or more intensities of the one or more wavelengths of light.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for reducing scattering effects and correcting for patient to patient anatomical variability are provided. The scattering coefficient of an individual patient'"'"'s tissue may be corrected for by examining the DC light levels of light passing through the tissue. By comparing the intensity of the light leaving the emitter with the light that reaches the detector to generate a DC component of the signal, which is representative of the anatomical structures of a patient, the AC component of the light may be corrected for the scattering coefficient of the tissue. By correcting the AC signal to account for the scattering coefficient of an individual patient'"'"'s tissue, a medical sensor may be calibrated in situ for every patient.
120 Citations
20 Claims
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1. A sensor comprising:
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an emitter capable of transmitting one or more wavelengths of light of one or more intensities; a detector capable detecting the one or more wavelengths of light, wherein the emitter and the detector being positioned a distance of 2 mm-5 mm apart; and a memory associated with the sensor, wherein the memory comprises data relating to the one or more intensities of the one or more wavelengths of light. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A physiological monitor comprising:
a processor programmed to; read information on a memory associated with a sensor about one or more intensities of one or more wavelengths of light emitted by an emitter associated with the sensor; receive a signal from the sensor, wherein the signal comprises a measured AC component and a measured DC component of the one or more wavelengths of light attenuated through a patient'"'"'s tissue; determine a change in intensity of the DC component based on the intensity of the one or more wavelengths of light emitted and the measured DC component of the one or more wavelengths of light; and determine a physiological parameter based at least in part on the AC component and the change in intensity of the DC component. - View Dependent Claims (9, 10, 11, 12)
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13. A method comprising:
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reading information on a memory associated with a sensor about one or more intensities of one or more wavelengths of light emitted by an emitter associated with the sensor; receiving a signal from the sensor, wherein the signal comprises a measured AC component and a measured DC component of the one or more wavelengths of light attenuated through a patient'"'"'s tissue; determining a change in intensity of the DC component based on the one or more intensities of the one or more wavelengths of light emitted and the measured DC component of the one or more wavelengths of light; and determining a physiological parameter based at least in part on the AC component and the change in intensity of the DC component. - View Dependent Claims (14, 15, 16)
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17. A method of manufacturing a sensor comprising:
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determining a first intensity of light of a first wavelength emitted by a first light emitting element; determining a second intensity of light of a second wavelength emitted by a second light emitting element, wherein when the ratio of the first intensity and the second intensity is within a certain range, the first light emitting element and the second light emitting element are placed together to form an emitter; and disposing the emitter and a detector capable detecting the first wavelength of light and the second wavelength of light a distance of 2 mm-5 mm apart on a substrate.
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- 18. The method of claim 18, comprising providing a dark area on the substrate substantially surrounding the emitter and the detector.
Specification