Oximetry probe with electronically selectable tissue depth analysis
First Claim
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1. A method comprising:
- providing a handheld oximeter housing;
providing a processor housed in the handheld oximeter housing;
providing a memory, housed in the handheld oximeter housing, electronically coupled to the processor;
providing a display, accessible from an exterior of the handheld oximeter housing, electronically coupled to the processor;
providing a battery, housed in the handheld oximeter housing;
providing for the battery to supply power to the processor, the memory, and the display;
providing a probe tip housed at least partially in the handheld oximeter housing;
providing a first source structure on a face of the probe tip;
providing a plurality of detector structures on the face of the probe tip;
providing for the first source structure to emit first light having a first wavelength and second light having a second wavelength into tissue to be measured, wherein the first wavelength is shorter than the second wavelength;
providing for a detection of the first light by the detector structures that are closer to the source structure than a threshold distance;
fitting, by the processor, first detector responses, that are generated by the detector structures that are closer to the source structure than the threshold distance based on the detected first light, to a plurality of simulated reflectance curves stored in the memory;
determining, by the processor, first measurement information for first tissue of the tissue to be measured, based on one or more best fitting ones of the simulated reflectance curve to the first detector responses;
providing for the detection of the second light by the detector structures that are farther from the source structure than the threshold distance; and
fitting, by the processor, second detector responses, that are generated by the detector structures that are farther from the source structure than the threshold distance based on the detected second light, to the plurality of simulated reflectance curves stored in the memory;
determining, by the processor, second measurement information, based on one or more best fitting ones of the simulated reflectance curve to the second detector responses;
determining, via the processor, second measurement information for second tissue of the tissue to be measured based on the second light detected by the detector structures that are farther from the source structure than the threshold distance;
based on the first measurement information, calculating and displaying on the display a first oxygen saturation measurement for a first tissue region below a surface of the tissue at a first depth;
based on the second measurement information, calculating and displaying on the display a second oxygen saturation measurement for a second tissue region below the surface of the tissue at a second depth; and
based on the first measurement information and the second measurement information, calculating and displaying on the display a third oxygen saturation measurement for a third tissue region below the surface of the tissue at a combination of the first and second depths, wherein the first tissue is a first depth below the surface of the tissue to be measured, the second tissue is a second depth below the surface of the tissue to be measured, and the first depth is less than the second depth.
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Abstract
An oximeter probe includes a probe unit or a base unit and a probe tip where the probe tip has a number of sources and detectors that can be accessed individually or in differing combinations for measuring tissue oxygen saturation at different tissue depth in tissue. A processor of the oximeter probe controls a multiplexer that is coupled to the detectors for selectively collecting measurement information from the detectors via the multiplexer. The oximeter probe is user programmable via one or more input devices on the oximeter probe for selecting the particular sources and detectors to collect measurement information from by the processor.
22 Citations
27 Claims
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1. A method comprising:
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providing a handheld oximeter housing; providing a processor housed in the handheld oximeter housing; providing a memory, housed in the handheld oximeter housing, electronically coupled to the processor; providing a display, accessible from an exterior of the handheld oximeter housing, electronically coupled to the processor; providing a battery, housed in the handheld oximeter housing; providing for the battery to supply power to the processor, the memory, and the display; providing a probe tip housed at least partially in the handheld oximeter housing; providing a first source structure on a face of the probe tip; providing a plurality of detector structures on the face of the probe tip; providing for the first source structure to emit first light having a first wavelength and second light having a second wavelength into tissue to be measured, wherein the first wavelength is shorter than the second wavelength; providing for a detection of the first light by the detector structures that are closer to the source structure than a threshold distance; fitting, by the processor, first detector responses, that are generated by the detector structures that are closer to the source structure than the threshold distance based on the detected first light, to a plurality of simulated reflectance curves stored in the memory; determining, by the processor, first measurement information for first tissue of the tissue to be measured, based on one or more best fitting ones of the simulated reflectance curve to the first detector responses; providing for the detection of the second light by the detector structures that are farther from the source structure than the threshold distance; and fitting, by the processor, second detector responses, that are generated by the detector structures that are farther from the source structure than the threshold distance based on the detected second light, to the plurality of simulated reflectance curves stored in the memory; determining, by the processor, second measurement information, based on one or more best fitting ones of the simulated reflectance curve to the second detector responses; determining, via the processor, second measurement information for second tissue of the tissue to be measured based on the second light detected by the detector structures that are farther from the source structure than the threshold distance; based on the first measurement information, calculating and displaying on the display a first oxygen saturation measurement for a first tissue region below a surface of the tissue at a first depth; based on the second measurement information, calculating and displaying on the display a second oxygen saturation measurement for a second tissue region below the surface of the tissue at a second depth; and based on the first measurement information and the second measurement information, calculating and displaying on the display a third oxygen saturation measurement for a third tissue region below the surface of the tissue at a combination of the first and second depths, wherein the first tissue is a first depth below the surface of the tissue to be measured, the second tissue is a second depth below the surface of the tissue to be measured, and the first depth is less than the second depth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device comprising:
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a handheld oximeter housing; a processor housed in the handheld oximeter housing; a memory, housed in the handheld oximeter housing, electronically coupled to the processor and storing a plurality of simulated reflectance curves; a display, accessible from an exterior of the handheld oximeter housing, electronically coupled to the processor; a battery, housed in the handheld oximeter housing, wherein the battery is coupled to and supplies power to the processor, the memory, and the display; a probe tip housed at least partially in the handheld oximeter housing; a first source structure on a face of the probe tip; and a plurality of detector structures on the face of the probe tip; wherein the processor is adapted for; providing for the detection of a first light by the detector structures that are closer to the first source structure than a threshold distance; fitting, by the processor, first detector responses, that are generated by the detector structures that are closer to the source structure than the threshold distance based on the detected first light, to the plurality of simulated reflectance curves stored in the memory; determining, by the processor, first measurement information, based on one or more best fitting ones of the simulated reflectance curve to the first detector responses; providing for the detection of a second light by the detector structures that are farther from the source structure than the threshold distance; fitting, by the processor, second detector responses, that are generated by the detector structures that are farther from the source structure than the threshold distance based on the detected second light, to the plurality of simulated reflectance curves stored in the memory; determining, by the processor, second measurement information, based on one or more best fitting ones of the simulated reflectance curve to the second detector responses; determining, via the processor, second measurement information for a tissue to be measured based on the second light detected by the detector structures that are farther from the source structure than the threshold distance; based on the first measurement information, calculating and displaying on the display a first oxygen saturation measurement for a first tissue region below a surface of a tissue at a first depth; based on the second measurement information, calculating and displaying on the display a second oxygen saturation measurement for a second tissue region below the surface of the tissue at a second depth; and based on the first measurement information and the second measurement information, calculating and displaying on the display a third oxygen saturation measurement for a third tissue region below the surface of the tissue at a combination of the first and second depths, wherein the first tissue region is a first depth below a surface of the tissue to be measured, the second tissue region is a second depth below the surface of the tissue to be measured, and the first depth is less than the second depth. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification