Implantable medical device diagnostic data acquisition and storage
First Claim
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1. A method for processing data in an implantable medical device (IMD), the method comprising:
- generating physiological data from signals received from one or more leads associated with the IMD;
sampling the physiological data to generate a plurality of data samples;
applying a linear predictive encoding algorithm having a first order derivative calculation to the plurality of data samples to generate a plurality of encoded data samples each corresponding to one of the plurality of data samples;
applying an entropy encoding algorithm to the plurality of encoded data samples to generate a plurality of code words each corresponding to one of the plurality of encoded data samples; and
storing the code words in a memory in the IMD.
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Abstract
Physiological data is generated from signals received from one or more leads associated with the IMD. The physiological data is sampled to generate a plurality of data samples. A predictive encoding algorithm is applied to the plurality of data samples to generate a plurality of encoded data samples each corresponding to one of the plurality of data samples. An entropy encoding algorithm is then applied to the plurality of encoded data samples to generate a plurality of code words each corresponding to one of the plurality of encoded data samples. The code words are then stored in a memory in the IMD.
88 Citations
17 Claims
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1. A method for processing data in an implantable medical device (IMD), the method comprising:
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generating physiological data from signals received from one or more leads associated with the IMD; sampling the physiological data to generate a plurality of data samples; applying a linear predictive encoding algorithm having a first order derivative calculation to the plurality of data samples to generate a plurality of encoded data samples each corresponding to one of the plurality of data samples; applying an entropy encoding algorithm to the plurality of encoded data samples to generate a plurality of code words each corresponding to one of the plurality of encoded data samples; and storing the code words in a memory in the IMD. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable medical device (IMD) comprising:
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one or more leads configured to sense physiological signals; a processor configured to; generate physiological data from the physiological signals received from one or more leads associated with the IMD; sample the physiological data to generate a plurality of data samples; apply a predictive encoding algorithm to the plurality of data samples to generate a plurality of encoded data samples each corresponding to one of the plurality of data samples; and apply an entropy encoding algorithm to the plurality of encoded data samples to generate a plurality of code words each corresponding to one of the plurality of encoded data samples; and a memory configured to; to store the physiological data in a circular buffer; to store the physiological data sample in an intermediate buffer; and store the code words. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An implantable medical device (IMD) comprising:
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a memory configured to store a prioritization schedule of physiological episodes, wherein the prioritization schedule specifies a priority for each of a plurality of types of physiological episodes, a minimum number indicating a minimum number of data sets to be recorded for each of the physiological episodes, and a maximum number indicating a maximum number of data sets to be recorded for each of the physiological episodes; and a processor configured to delete a first recorded set of diagnostic data associated with a type of physiological episode of a first priority, only if a second received set of diagnostic data is associated with a type of physiological episode of a second priority that is higher than the first priority, and deletion of the first set of diagnostic data would not result in fewer sets of diagnostic data than the minimum number specified for the type of episode associated with the first set of diagnostic data. - View Dependent Claims (16, 17)
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Specification