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Apparatus for data retention in an implantable medical device

  • US 10,201,305 B2
  • Filed: 11/02/2005
  • Issued: 02/12/2019
  • Est. Priority Date: 11/02/2004
  • Status: Active Grant
First Claim
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1. A medical device for monitoring physiologic activity, comprising:

  • (A) a physiologic monitoring element comprising a physiologic sensor configured to obtain at least one physiologic signal associated with an event and produce physiologic data regarding the event from the physiologic signal;

    (B) a memory component configured to store data regarding the event, the memory component comprising;

    (i) a first data structure configured to store a plurality of data records, each data record representing information about an associated event including an associated priority index the first data structure comprising a new data pointer configured to point to one of a plurality of data entries, and, after a data record is stored in the one of a plurality of data entries, point to another data entry where the next incoming data record is to be stored in the first data structure; and

    (ii) a second data structure, the second data structure distinct from the first data structure; and

    (C) a processing component interfacing with the monitoring element and the memory component and configured to;

    (i) replace at least a portion of an existing data record in the first data structure with a new data record; and

    (ii) store in the second data structure at least the portion of the existing data record that was replaced from the first data structure if the associated priority index of the existing data record exceeds a threshold criterion that is pre-determined relative to creation of the data records so as to be determined independently from a determination of which priority indexes to associate to the data records within the first and second data structures.

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