Method and apparatus for selecting activity response vector
AssigneeMedtronic, Inc.
InventorsWade M. Demmer, Todd J. Sheldon
Life of this patent
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Abstract
A medical device and associated method evaluate vectors of a multi-dimensional accelerometer by receiving a signal from the accelerometer for each of the vectors and determining a metric from the signal for each of the vectors during a first sensing condition and during a second sensing condition. The difference between the metrics determined for the first sensing condition and the second sensing condition for each of the vectors is determined. One of the vectors is selected, based upon the determined differences, for monitoring the patient.
Claims23
A method of evaluating vectors of an implantable multi-dimensional accelerometer for monitoring a patient, comprising:
- receiving a signal from the accelerometer for each of the plurality of vectors;
- determining a metric from the signal for each of the plurality of vectors during a first sensing condition;
- determining the metric from the signal for each of the plurality of vectors during a second sensing condition;
- determining a difference between the metrics determined for the first sensing condition and the second sensing condition for each of the plurality of vectors;
- and
- selecting, based upon the determined differences, one of the plurality of vectors for monitoring the patient.
The method of claim 6, wherein the therapy control parameter is a parameter for controlling rate responsive cardiac pacing.
An implantable medical device, comprising:
- a multi-dimensional accelerometer comprising a plurality of vectors for sensing motion;
- and
- a processor configured to:
- evaluate the plurality of vectors by:
- receiving a signal from the accelerometer for each of the plurality of vectors;
- determining a metric from the signal for each of the plurality of vectors during a first sensing condition;
- determining the metric from the signal for each of the plurality of vectors during a second sensing condition;
- determining a difference between the metrics determined for the first sensing condition and the second sensing condition for each of the plurality of vectors;
- and
- select, based upon the determined differences, one of the plurality of vectors for monitoring the patient.
A non-transitory computer readable storage medium storing a set of instructions that cause a processor of an implantable medical device comprising a multi-dimensional accelerometer to:
- evaluate a plurality of vectors of the multi-dimensional accelerometer by:
- receiving a signal from the accelerometer for each of the plurality of vectors;
- determining a metric from the signal for each of the plurality of vectors during a first sensing condition;
- determining the metric from the signal for each of the plurality of vectors during a second sensing condition;
- determining a difference between the metrics determined for the first sensing condition and the second sensing condition for each of the plurality of vectors;
- and
- select, based upon the determined differences, one of the plurality of vectors for monitoring the patient.
Dependencies are inferred from the claim text.