Medical sensor and technique for using the same
First Claim
Patent Images
1. A sensor comprising:
- a sensor body;
an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue;
a detector disposed on the sensor body, wherein the detector is adapted to detect the light;
a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and
a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the light absorbing material comprises a temperature-sensitive material capable of changing color in response to a change in temperature, and wherein the second portion is adapted to be positioned proximate to relatively large subcutaneous anatomic structures of the tissue.
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Abstract
A sensor may be adapted to account for factors that cause irregularities in sensor measurements. A sensor may selectively absorb light from outside sources. A sensor may selectively absorb light near a region of tissue having relatively large subcutaneous anatomic structures, such as large blood vessels, and selectively reflect light near a region of tissue that is relatively free of large blood vessels or other structures. The sensor is adapted to reduce the effect of large subcutaneous anatomic structures and outside light on measurements for pulse oximetry or other spectrophotometric techniques.
923 Citations
60 Claims
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1. A sensor comprising:
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a sensor body; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the light absorbing material comprises a temperature-sensitive material capable of changing color in response to a change in temperature, and wherein the second portion is adapted to be positioned proximate to relatively large subcutaneous anatomic structures of the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sensor comprising:
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an emitter adapted to deliver light into a tissue, wherein the tissue comprises relatively large subcutaneous anatomic structures and relatively small subcutaneous anatomic structures; a detector adapted to detect the light; and a sensor body on which the emitter and detector are disposed, the sensor body having a tissue-contacting surface, wherein the detector forms a portion of the tissue-contacting surface, and wherein the tissue-contacting surface is adapted to absorb light proximate to the relatively large subcutaneous anatomic structures and to reflect light proximate to the relatively small subcutaneous anatomic structures, and wherein the tissue-contacting surface comprises a pressure-sensitive material capable of changing color in response to a change in pressure. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. 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; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the light absorbing material comprises a temperature-sensitive material capable of changing color in response to a change in temperature, and wherein the second portion is adapted to be positioned proximate to relatively large subcutaneous anatomic structures of the tissue. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A method comprising:
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delivering light through a patient'"'"'s tissue; detecting the light through a patient'"'"'s tissue with a detector, the detector configured to form a portion of a tissue-contacting surface of a sensor; absorbing the light with an absorptive material disposed on the tissue-contacting surface proximate to relatively large vascular structures; and reflecting the light with a reflective material disposed on the tissue-contacting surface proximate to relatively small vascular structures, and wherein the reflective material comprises a material capable of changing reflectivity in response to a change in pressure. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A method of manufacturing a sensor, the method comprising:
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providing a sensor body; providing an emitter adapted to transmit light into tissue; providing a detector adapted to detect the light; providing a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and providing a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the second portion is adapted to be positioned proximate to relatively large subcutaneous anatomic structures of the tissue, and wherein the light absorbing material comprises a temperature-sensitive material capable of changing absorptivity in response to a change in temperature. - View Dependent Claims (45)
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46. A method comprising:
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delivering light through a patient'"'"'s tissue; and reflecting the light with a temperature-sensitive material adapted to have increased reflectivity when exposed to relatively low temperatures. - View Dependent Claims (47)
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48. A method comprising:
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delivering light through a patient'"'"'s tissue; and absorbing the light with a material adapted to have increased absorption after receiving a feedback related to pressure. - View Dependent Claims (49)
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50. A sensor comprising:
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a sensor body; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a temperature-sensitive material disposed on the sensor body, wherein the temperature-sensitive material is capable of increasing in absorptivity or reflectivity upon experiencing a change in temperature. - View Dependent Claims (51, 52, 53, 54)
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55. A sensor comprising:
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a sensor body; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a pressure-sensitive material disposed on the sensor body, wherein the pressure-sensitive material is capable of increasing in absorptivity or reflectivity upon experiencing a change in pressure.
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56. A sensor comprising:
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a sensor body; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the light absorbing material comprises a pressure-sensitive material capable of changing color in response to a change in pressure.
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57. 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; an emitter disposed on the sensor body, wherein the emitter is adapted to transmit light into tissue; a detector disposed on the sensor body, wherein the detector is adapted to detect the light; a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the light absorbing material comprises a pressure-sensitive material capable of changing color in response to a change in pressure.
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58. A sensor comprising:
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an emitter adapted to deliver light into a tissue; a detector adapted to detect the light; and a sensor body on which the emitter and detector are disposed, the sensor body having a tissue-contacting surface, wherein the detector forms a portion of the tissue-contacting surface, and wherein the tissue-contacting surface is adapted to absorb light and to reflect light, and wherein the tissue-contacting surface comprises a temperature-sensitive material capable of changing color in response to a change in temperature.
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59. A method of manufacturing a sensor, the method comprising:
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providing a sensor body; providing an emitter adapted to transmit light into tissue; providing a detector adapted to detect the light; providing a light reflecting material disposed proximate to the emitter and detector on a first portion of a tissue-contacting surface of the sensor body, wherein the detector forms a portion of the tissue-contacting surface; and providing a light absorbing material disposed on a second portion of the tissue-contacting surface of the sensor body, wherein the second portion is adapted to be positioned proximate to relatively large subcutaneous anatomic structures of the tissue, and wherein the light absorbing material comprises a pressure-sensitive material capable of changing absorptivity in response to a change in pressure.
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60. A method comprising:
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delivering light through a patient'"'"'s tissue; and absorbing the light with a material adapted to change absorptivity after receiving a feedback related to a change in temperature.
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Specification