METHOD AND APPARATUS FOR POST-SHOCK EVALUATION USING TISSUE OXYGENATION MEASUREMENTS
First Claim
1. A method for delivering therapy in a medical device, comprising:
- sensing cardiac signals;
detecting a cardiac event in response to the sensed cardiac signals;
delivering a therapy in response to the detected cardiac event;
controlling light emission of an optical sensor in response to delivering the therapy;
detecting emitted light scattered by a tissue volume adjacent the optical sensor to generate a corresponding detected light intensity output signal;
determining tissue oxygenation measurements in response to the output signal;
determining a tissue oxygenation trend in response to the tissue oxygenation measurements; and
determining whether the delivered therapy restored cardiac hemodynamic function in response to the determined tissue oxygenation trend.
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Accused Products
Abstract
A method and device for delivering therapy that includes an electrode to sense cardiac signals and to deliver a therapy, a therapy delivery module coupled to the electrode to deliver a therapy via the electrode in response to the sensed cardiac signals, a sensor emitting light and detecting emitted light scattered by a tissue volume adjacent the optical sensor to generate a corresponding detected light intensity output signal, a control module coupled to the sensor to control light emission of the sensor in response to delivering the therapy, and a controller coupled to the therapy delivery module and the sensor, the controller configured to determine tissue oxygenation measurements in response to the output signal, determine a tissue oxygenation trend in response to the tissue oxygenation measurements, and determine whether the delivered therapy restored cardiac hemodynamic function in response to the determined tissue oxygenation trend.
45 Citations
20 Claims
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1. A method for delivering therapy in a medical device, comprising:
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sensing cardiac signals; detecting a cardiac event in response to the sensed cardiac signals; delivering a therapy in response to the detected cardiac event; controlling light emission of an optical sensor in response to delivering the therapy; detecting emitted light scattered by a tissue volume adjacent the optical sensor to generate a corresponding detected light intensity output signal; determining tissue oxygenation measurements in response to the output signal; determining a tissue oxygenation trend in response to the tissue oxygenation measurements; and determining whether the delivered therapy restored cardiac hemodynamic function in response to the determined tissue oxygenation trend. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A medical device for delivering therapy, comprising:
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an electrode to sense cardiac signals and to deliver a therapy; a therapy delivery module coupled to the electrode to deliver a therapy via the electrode in response to the sensed cardiac signals corresponding to a predetermined cardiac event; a sensor emitting light and detecting emitted light scattered by a tissue volume adjacent the optical sensor to generate a corresponding detected light intensity output signal; a control module coupled to the sensor to control light emission of the sensor in response to delivering the therapy; and a controller coupled to the therapy delivery module and the sensor, the controller configured to determine tissue oxygenation measurements in response to the output signal, determine a tissue oxygenation trend in response to the tissue oxygenation measurements, and determine whether the delivered therapy restored cardiac hemodynamic function in response to the determined tissue oxygenation trend. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer readable medium having computer executable instructions for performing a method comprising:
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sensing cardiac signals; detecting a cardiac event in response to the sensed cardiac signals; delivering a therapy in response to the detecting a cardiac event; controlling light emission of an optical sensor in response to delivering the therapy; detecting emitted light scattered by a tissue volume adjacent the optical sensor to generate a corresponding detected light intensity output signal; determining tissue oxygenation measurements in response to the output signal; determining a tissue oxygenation trend in response to the determined tissue oxygenation measurements; and determining whether the delivered therapy restored cardiac hemodynamic function in response to the determined tissue oxygenation trend.
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Specification