Implantable heart sound sensor with noise cancellation
AssigneeMedtronic, Inc.
InventorsDavid A. Anderson, Can Cinbis
Life of this patent
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Abstract
An implantable medical device system senses a first signal using a first acoustical sensor adapted to be operatively positioned in a first internal body location for sensing heart sounds in a patient. The system includes a second acoustical sensor adapted to be operatively positioned in a second internal body location for sensing sounds in the patient and generate a second signal that is less responsive to the heart sounds than the first acoustical signal. An implantable medical device including a housing and a processor enclosed in the housing receives the first signal and the second signal and generates a corrected first signal by canceling non-cardiac signals in the first signal using the second signal.
Claims9
An implantable medical device system, comprising:
- a first acoustical sensor adapted to be operatively positioned in a first internal body location to have a first level of responsiveness for sensing heart sounds in a patient, and to generate a first signal responsive to the sensed heart sounds;
- a second acoustical sensor adapted to be operatively positioned in a second internal body location to have a second level of responsiveness for sensing heart sounds in the patient less than the first level of responsiveness, and to generate a second signal responsive to the heart sounds;
- and
- an implantable medical device comprising a housing and a processor enclosed in the housing, the processor configured to receive the first signal and the second signal and generate a corrected first signal by canceling non-cardiac signals in the first signal using the second signal;
- wherein the housing comprises:
- a first side, said first acoustical sensor being positioned on said first side;
- and
- a second side opposite said first side, said second acoustical sensor being positioned on said second side.
A method for use in an implantable medical device system comprising an implantable medical device having a housing with a first side and a second side opposite the first side, comprising:
- sensing heart sounds in a patient using a first acoustical sensor positioned on the first side of the housing to have a first level of responsiveness for sensing heart sounds in a patient, and to generate a first signal responsive to the sensed heart sounds;
- sensing sounds in the patient using a second acoustical sensor positioned on the second side of the housing to have a second level of responsiveness for sensing heart sounds in the patient less than the first level of responsiveness, and to generate a second signal responsive to the heart sounds;
- and
- processing the first and second signals to generate a corrected first signal by canceling non-cardiac signals in the first signal using the second signal.
Dependencies are inferred from the claim text.