Measuring cerebral oxygen saturation
First Claim
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1. A device comprising:
- a sensor pad configured to be placed adjacent to a tissue;
a first source structure disposed on a tissue contacting side of the sensor pad;
a first near detector structure disposed on the tissue contacting side of the sensor pad;
a first far detector structure disposed on the tissue contacting side of the sensor pad; and
a light diffusing layer, wherein the first near detector structure receives a beam of light after the beam of light has been transmitted through a tissue and the light diffusing layer and wherein the first far detector structure receives the beam of light without the beam of light being transmitted through the light diffusing layer.
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Abstract
A device includes source and detector sensors. In a specific implementation, the device has two near detectors, two far detectors, and two sources. The two near detectors are arranged closer to the two sources than the two far detectors. A light-diffusing layer covers the two near detectors. The device may be part of a medical device that is used to monitor or measure oxygen saturation levels in a tissue. In a specific implementation, light is transmitted into the tissue and received by the detectors. An attenuation coefficient is first calculated for a shallow layer of tissue. The attenuation coefficient is then used to calculate an attenuation coefficient for a deep layer of tissue.
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Citations
27 Claims
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1. A device comprising:
- a sensor pad configured to be placed adjacent to a tissue;
a first source structure disposed on a tissue contacting side of the sensor pad;
a first near detector structure disposed on the tissue contacting side of the sensor pad;
a first far detector structure disposed on the tissue contacting side of the sensor pad; and
a light diffusing layer, wherein the first near detector structure receives a beam of light after the beam of light has been transmitted through a tissue and the light diffusing layer and wherein the first far detector structure receives the beam of light without the beam of light being transmitted through the light diffusing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- a sensor pad configured to be placed adjacent to a tissue;
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17. A probe, the probe being adapted for use as a part of a medical device system for measuring oxygen levels in a tissue, the probe comprising:
- a sensor pad having a first cavity, a second cavity, and a third cavity, wherein a semitranslucent film is coupled to a bottom surface of the sensor pad and partially overlaps a first cavity opening of the first cavity, and the first cavity extends from the first cavity opening to a first inside surface that is opposite to the first cavity opening; and
a sensor arrangement comprising a plurality of photodetectors coupled to the first inside surface of the first cavity, a first source structure coupled to the second cavity, and a second source structure coupled to the third cavity, wherein at least one of the photodetectors is covered by the semitranslucent film and wherein at least one of the photodetectors is not covered by the semitranslucent film, and the at least one of the photodetectors is covered by the semitranslucent film is closer to the first source structure than the at least one of the photodetectors is not covered by the semitranslucent film. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- a sensor pad having a first cavity, a second cavity, and a third cavity, wherein a semitranslucent film is coupled to a bottom surface of the sensor pad and partially overlaps a first cavity opening of the first cavity, and the first cavity extends from the first cavity opening to a first inside surface that is opposite to the first cavity opening; and
Specification