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;
allowing 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 first probe tip;
allowing for the 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;
allowing for the 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 a 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, based on one or more best fitting ones of the simulated reflectance curve to the first detector responses;
allowing 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,wherein the first tissue is a first depth below a 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.
4 Citations
21 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; allowing 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 first probe tip; allowing for the 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; allowing for the 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 a 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, based on one or more best fitting ones of the simulated reflectance curve to the first detector responses; allowing 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, wherein the first tissue is a first depth below a 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)
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6. 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 couple 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 first probe tip; wherein the processor is adapted for; allowing for the 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 a 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; allowing 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, wherein the first tissue is a first depth below a 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 (7, 8, 9, 10)
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11. 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, wherein the memory stores simulated reflectance curves; 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; allowing 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 source structure on a face of the probe tip; providing a plurality of detector structures on the face of the first probe tip; allowing for the source structure to emit light into tissue to be measured; allowing for the detector structures to detect the light subsequent to reflection from the tissue to be measured; allowing for the detector structures to generate reflectance measurements from the light detected by the detector structures; allowing for the processor to fit a first portion of the reflectance measurements to the simulated reflectance curves, wherein the first portion of the reflectance data is generated by a first portion of detector structures that are closer than a threshold distance to the source structure; allowing for the processor to fit a second portion of the reflectance measurements to the simulated reflectance curves, wherein the second portion of the reflectance data is generated by the first portion of the detector structures and a first additional one of the detector structures, the first additional one of the detector structures is farther than the threshold distance from the source structure; allowing for the processor to determine if the fit of the first portion of the reflectance measurements is a closer fit than the fit of the second portion of the reflectance measurements; allowing for the processor to determine first optical properties of the tissue using the first portion of the reflectance data and displaying the first optical properties on the display if the fit of the first portion of the reflectance data is a closer fit than the second portion of the reflectance measurements; allowing for the processor to fit a third portion of the reflectance measurements to the simulated reflectance curves, wherein the third portion of the reflectance data is generated by the first portion of the detector structures, the first additional one of the detector structures, and a second additional one of the detector structures, wherein the second additional one of the detector structures is farther than the first additional one of the detector structures past the threshold distance from the source structure; allowing for the processor to determine if the fit of second portion of the reflectance measurements is a closer fit than the fit of the third portion of the reflectance measurements; allowing for the processor to determine second optical properties of the tissue using the second portion of the reflectance data and displaying the second optical properties on the display if the fit of the second portion of the reflectance data is a closer fit than the third portion of the reflectance measurements; and allowing for the processor to determine third optical properties of the tissue using the third portion of the reflectance data and displaying the third optical properties on the display if the fit of the third portion of the reflectance data is a closer fit than the second portion of the reflectance measurements. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. 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; allowing for the battery to supply power to the processor, the memory, and the display; providing a first probe tip comprising a first source structure and a first plurality of detector structures having a first arrangement; coupling the first probe tip to the handheld oximeter housing; providing a second probe tip comprising a second source structure and a second plurality of detector structures having a second arrangement, wherein the first and second arrangements are different arrangements; and replacing the first probe tip with the second probe tip via coupling the second probe tip to the handheld oximeter housing such that the first arrangement is changed to the second arrangement. - View Dependent Claims (19, 20, 21)
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Specification