Medical sensor for reducing motion artifacts and technique for using the same
First Claim
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1. A sensor comprising:
- a conformable sensor body comprising an adhesive layer disposed on a tissue-contacting surface, wherein the sensor body is configured to wrap around an end of a patient'"'"'s digit;
a rigid housing disposed on the conformable sensor body on the tissue-contacting surface and configured to directly contact a patient'"'"'s tissue when in use; and
an emitter and a detector embedded in the rigid housing in a reflectance configuration, wherein the rigid housing is adapted to hold the emitter and the detector at a fixed optical distance relative to one another and relative to the patient'"'"'s digit when the sensor is attached to a patient and when the sensor experiences an external tapping force or when the digit applies a flexing force to the sensor.
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Abstract
A sensor for pulse oximetry or other applications utilizing spectrophotometry may be adapted to reduce motion artifacts by fixing the optical distance between an emitter and detector. A flexible sensor is provided with a stiffening member to hold the emitter and detector of the sensor in a relatively fixed position when applied to a patient. Further, an annular or partially annular sensor is adapted to hold an emitter and detector of the sensor in a relatively fixed position when applied to a patient. A clip-style sensor is provided with a spacer that controls the distance between the emitter and detector.
947 Citations
20 Claims
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1. A sensor comprising:
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a conformable sensor body comprising an adhesive layer disposed on a tissue-contacting surface, wherein the sensor body is configured to wrap around an end of a patient'"'"'s digit; a rigid housing disposed on the conformable sensor body on the tissue-contacting surface and configured to directly contact a patient'"'"'s tissue when in use; and an emitter and a detector embedded in the rigid housing in a reflectance configuration, wherein the rigid housing is adapted to hold the emitter and the detector at a fixed optical distance relative to one another and relative to the patient'"'"'s digit when the sensor is attached to a patient and when the sensor experiences an external tapping force or when the digit applies a flexing force to the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 conformable sensor body comprising an adhesive layer disposed on a tissue-contacting surface, wherein the sensor body is configured to wrap around an end of a patient'"'"'s digit; a rigid housing disposed on the conformable sensor body on the tissue-contacting surface and configured to directly contact a patient'"'"'s tissue when in use; and an emitter and a detector embedded in the rigid housing in a reflectance configuration, wherein the rigid housing is adapted to hold the emitter and the detector at a fixed optical distance relative to one another and relative to the patient'"'"'s digit when the sensor is attached to a patient and when the sensor experiences an external tapping force or when the digit applies a flexing force to the sensor. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of manufacturing a pulse oximetry sensor, comprising:
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providing a conformable sensor body comprising an adhesive layer disposed on a tissue-contacting surface adapted to wrap around an end of a patient'"'"'s digit; providing a rigid housing, wherein the rigid housing comprises an emitter and detector disposed on or in the rigid housing in a reflectance configuration; and disposing the rigid housing on the tissue-contacting surface of the conformable sensor body, wherein the rigid housing is adapted to hold the emitter and the detector at a fixed optical distance relative to one another and relative to the patient'"'"'s digit and to directly contact a patient'"'"'s tissue when the sensor is attached to a patient and when the sensor experiences an external tapping force or when the digit applies a flexing force to the sensor. - View Dependent Claims (19, 20)
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Specification