Variable aperture sensor
First Claim
Patent Images
1. 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.
129 Citations
13 Claims
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1. 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)
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6. A pulse oximetry sensor method comprising the steps of:
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emitting optical radiation into a tissue site;
attenuating said optical radiation after absorption by said tissue site;
detecting said optical radiation after absorption by said tissue site; and
generating a physiological signal responsive to said absorption. - View Dependent Claims (7, 8, 9)
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10. A pulse oximetry sensor comprising:
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an emitter means for transmitting optical radiation into a tissue site;
a detector means for receiving said optical radiation after absorption by said tissue site;
an attachment means for positioning said emitter means and said detector means on said tissue site; and
an attenuating means disposed in said attachment means for reducing said optical radiation incident on said detector means. - View Dependent Claims (11, 12, 13)
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Specification