Medical sensor and technique for using the same
First Claim
Patent Images
1. A sensor comprising:
- a sensor body adapted to operate in a reflectance mode;
an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue;
a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and
at least one protrusion protruding non-orthogonally from a tissue-contacting surface of the sensor body comprising a patterned region disposed on a surface of the protrusion, and wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially in-line with an imaginary axis connecting the emitter and the detector.
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Abstract
A medical sensor may be adapted to account for factors that cause irregularities in pulse oximetry measurements or other spectrophotemetric measurements. Sensors are provided with surface features that reduce the amount of outside light or shunted light that impinge the detecting elements of the sensor. The sensor is adapted to reduce the effect of outside light or shunted light on pulse oximetry measurements.
915 Citations
26 Claims
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1. A sensor comprising:
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a sensor body adapted to operate in a reflectance mode; an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and at least one protrusion protruding non-orthogonally from a tissue-contacting surface of the sensor body comprising a patterned region disposed on a surface of the protrusion, and wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially in-line with an imaginary axis connecting the emitter and the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14)
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10. A pulse oximetry system comprising:
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a pulse oximetry monitor; and a pulse oximetry sensor adapted to be operatively coupled to the monitor, the sensor comprising; a sensor body adapted to operate in a reflectance mode; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit a first light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and at least one protrusion protruding non-orthogonally from a tissue-contacting surface of the sensor body, wherein the at least one protrusion comprises an irregular profile on a surface that is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially in-line with an imaginary axis connecting the emitter and the detector. - View Dependent Claims (11, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method comprising:
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providing a sensor body adapted to operate in a reflectance mode; providing an emitter adapted to transmit a first light into tissue; providing a detector adapted to detect the first light; and providing a first protrusion and a second protrusion disposed on a tissue-contacting surface of the sensor body between the emitter and the detector, wherein the first protrusion protrudes a greater amount from the surface than the second protrusion and wherein either the first protrusion or the second protrusion comprises a light diffracting material, wherein the light diffracting material is adapted to destructively interfere with a wavelength of light emitted by the emitter. - View Dependent Claims (24, 25)
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26. A sensor comprising:
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a sensor body adapted to operate in a reflectance mode; an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and at least one protrusion comprising a patterned region disposed on a surface of the protrusion, wherein the at least one protrusion comprises a light diffracting material, wherein the light diffracting material is adapted to destructively interfere with a wavelength of light emitted by the emitter.
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Specification