Method and apparatus for post-shock evaluation using tissue oxygenation measurements
First Claim
1. A method of delivering therapy in a medical device, comprising:
- emitting light from an emitting portion of a sensor at a predetermined emitted light intensity to an adjacent volume of tissue at a plurality of wavelengths;
detecting the emitted light scattered by the volume of tissue to generate corresponding detected light intensity output signals;
detecting, in the emitting portion of the sensor, a change corresponding to a shift in the emitted light intensity from the predetermined intensity before the emitted light enters the adjacent tissue volume;
adjusting the detected light intensity output signals in response to the detected change;
determining a tissue oxygenation index in response to only the adjusted detected light intensity output signals; and
controlling delivery of a therapy in response to the determined tissue oxygenation index.
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Accused Products
Abstract
A method and apparatus for controlling delivery of therapy that includes an emitting portion emitting light at a predetermined emitted light intensity to a volume of tissue at a plurality of wavelengths, and a detecting portion detecting the emitted light scattered by the volume of tissue to generate corresponding detected light intensity output signals. A control module adjusts the detected light intensity output signals for shifts in intensity corresponding to the emitted light intensity, and determines a tissue oxygenation index in response to only the adjusted detected light intensity output signals, and a therapy delivery module controlling therapy in response to the determined tissue oxygenation index.
112 Citations
22 Claims
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1. A method of delivering therapy in a medical device, comprising:
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emitting light from an emitting portion of a sensor at a predetermined emitted light intensity to an adjacent volume of tissue at a plurality of wavelengths; detecting the emitted light scattered by the volume of tissue to generate corresponding detected light intensity output signals; detecting, in the emitting portion of the sensor, a change corresponding to a shift in the emitted light intensity from the predetermined intensity before the emitted light enters the adjacent tissue volume; adjusting the detected light intensity output signals in response to the detected change; determining a tissue oxygenation index in response to only the adjusted detected light intensity output signals; and controlling delivery of a therapy in response to the determined tissue oxygenation index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical device having a sensor for controlling delivery of therapy by the device, comprising:
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an emitting portion configured to emit light at a predetermined emitted light intensity to an adjacent volume of tissue at a plurality of wavelengths; a detecting portion configured to detect the emitted light scattered by the volume of tissue to generate corresponding detected light intensity output signals; a control module configured to; detect, in the emitting portion of the sensor, a change corresponding to a shift in the emitted light intensity from the predetermined intensity before the emitted light enters the adjacent tissue volume; adjust the detected light intensity output signals in response to the detected change, and determine a tissue oxygenation index in response to only the adjusted detected light intensity output signals; and a therapy delivery module configured to control delivery of a therapy in response to the determined tissue oxygenation index. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer readable medium having computer executable instructions for performing a method comprising:
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emitting light from an emitting portion of a sensor at a predetermined emitted light intensity to an adjacent volume of tissue at a plurality of wavelengths; detecting the emitted light scattered by the volume of tissue to generate corresponding detected light intensity output signals; detecting, in the emitting portion of the sensor, a change corresponding to a shift in the emitted light intensity from the predetermined intensity before the emitted light enters the adjacent tissue volume; adjusting the detected light intensity output signals in response to the detected change; determining a tissue oxygenation index in response to only the adjusted detected light intensity output signals; and controlling delivery of a therapy in response to the determined tissue oxygenation index. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification