Variable aperture sensor
First Claim
Patent Images
1. A pulse oximetry sensor comprising:
- a first jaw;
an emitter disposed in said first jaw;
a second jaw rotatably attached to said first jaw;
a detector disposed in said second jaw; and
a variable aperture disposed in said second jaw,said jaws adapted to attach to a tissue site so that said emitter transmits optical radiation into said tissue site and said detector receives optical radiation through said variable aperture after absorption by said tissue site,said variable aperture configured to adjust the amount of said optical radiation received by said detector.
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Abstract
A variable aperture sensor has a first jaw and a second jaw that are rotatably attached. An emitter is disposed in the first jaw, and a detector is disposed in the second jaw. The jaws are adapted to attach to a tissue site so that the emitter transmits optical radiation into the tissue site and the detector receives optical radiation through a variable aperture after absorption by the tissue site. The variable aperture is disposed in the second jaw and configured to adjust the amount of the optical radiation received by the detector.
772 Citations
14 Claims
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1. A pulse oximetry sensor comprising:
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a first jaw; an emitter disposed in said first jaw; a second jaw rotatably attached to said first jaw; a detector disposed in said second jaw; and a variable aperture disposed in said second jaw, said jaws adapted to attach to a tissue site so that said emitter transmits optical radiation into said tissue site and said detector receives optical radiation through said variable aperture after absorption by said tissue site, said variable aperture configured to adjust the amount of said optical radiation received by said detector. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pulse oximetry sensor method comprising the steps of:
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emitting optical radiation into a tissue site from a first jaw of a housing; manually varying a size of an aperture, said size responsive to tissue site physical and physiological characteristics, said manual varying adjusting attenuation of said optical radiation; detecting, at a second jaw of said housing hingably attached to said first jaw, said optical radiation that has passed through said aperture and been absorbed by said tissue site; and generating a physiological signal responsive to said absorption. - View Dependent Claims (8, 9, 10)
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11. A pulse oximetry sensor comprising:
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means for transmitting optical radiation into a tissue site; means for receiving said optical radiation after absorption by said tissue site; means for positioning said means for transmitting and said means for receiving on said tissue site including a clam shell housing configured to substantially close around said tissue site; and an intensity adjuster for manually adjusting an intensity of said optical radiation incident on said means for receiving, said intensity adjuster comprising one or more devices configured to vary a size of an aperture through which said optical radiation passes. - View Dependent Claims (12, 13, 14)
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Specification