Shunt barrier in pulse oximeter sensor
First Claim
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1. A sensor comprising:
- a light emitter;
a first layer coupled to the light emitter;
a light detector;
a second layer coupled to the light detector; and
an air gap forming a shunt barrier, the air gap disposed between an end of the first layer and an end of the second layer.
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Abstract
A pulse oximeter sensor comprising an emitter and a detector disposed on a substrate layer with a thinned portion between the emitter and the detector. A partially transparent covering layer covers the substrate layer and comprises a corresponding thinned portion. The thinned portions attenuate light shunted via the substrate layer and the partially transparent covering layer from the emitter to the detector, and may be configured such that less than 10% of the light detectable by the detector is shunted light.
40 Citations
38 Claims
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1. A sensor comprising:
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a light emitter; a first layer coupled to the light emitter; a light detector; a second layer coupled to the light detector; and an air gap forming a shunt barrier, the air gap disposed between an end of the first layer and an end of the second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sensor substrate comprising:
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a first layer comprising a location for a light emitter; a second layer comprising a location for a light detector; and an air gap forming a shunt barrier, the air gap disposed between an end of the first layer and an end of the second layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of manufacturing a sensor comprising:
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providing a light emitter coupled to a first layer and a light detector coupled to a second layer; providing an air gap to form a shunt barrier, the air gap disposed between an end of the first layer and an end of the second layer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of operating a sensor comprising:
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emitting light at a patient with a light emitter coupled to a first layer;
detecting light from the patient with a light detector coupled to a second layer; andattenuating light passing through the first layer and the second layer using an air gap which forms a shunt barrier disposed between the first layer and the second layer. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A sensor comprising:
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a light emitter; a first layer coupled to the light emitter; a light detector; a second layer coupled to the light detector, wherein a transverse end of the second layer is separated from a transverse end of the first layer by a gap; and a shunt barrier comprising a fibrous material disposed over the gap, wherein the shunt barrier extends from over a portion of the first layer at the transverse end of the first layer to over a portion of the second layer at the transverse end of the second layer, and wherein the shunt barrier extends between the transverse end of the first layer and the transverse end of the second layer to fill the gap. - View Dependent Claims (35, 36)
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37. A sensor comprising:
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a light emitter assembly; a first layer coupled to the light emitter assembly; a light detector assembly; a second layer coupled to the light detector assembly, wherein a transverse end of the second layer is separated from a transverse end of the first layer by a gap; and a shunt barrier disposed over the gap, wherein the shunt barrier comprises a third layer extending from over a portion of the first layer at the transverse end of the first layer to over a portion of the second layer at the transverse end of the second layer, wherein the third layer comprises an adhesive configured to adhere a portion of the third layer to a tissue location on a patient, so as to at least partially close the gap with the portion of the third layer.
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38. A sensor comprising:
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a light emitter assembly; a first layer coupled to the light emitter assembly; a light detector assembly; a second layer coupled to the light detector assembly, wherein a transverse end of the second layer is separated from a transverse end of the first layer by a gap; a third layer coupled to at least the transverse end of the first layer to at least the transverse end of the second layer, the third layer extending over the gap; and a pad disposed on the third layer within the gap and configured to compress against a tissue location on a patient.
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Specification