System for characterizing chronic physiological data

• US 8,036,749 B2
• Filed: 03/31/2005
• Issued: 10/11/2011
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Sarkar, Shantanu, Hettrick, Douglas A., Ziegler, Paul D.
• Primary Examiner(s): Layno; Carl H
• Assistant Examiner(s): Dinga; Roland
• Application Number:
  US11/096,151
• Publication Number:
  US 20060224186A1
• Time in Patent Office: 2,385 Days
• Field of Search: 600/300, 600/519, 600/509, 600/301, 600/513, 607/2, 607/14, 607/19, 607/18, 607/515, 607/509, 607/59, 607/30, 607/32, 607/60, 705/3
• US Class Current: 607/32
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/7257 using Fourier transforms

Abstract

An implantable medical device (IMD) senses physiological episodes and stores data associated with the physiological episodes in the IMD. The data is then processed based on a pattern of recurrence of the physiological episodes.

Claims

1. A method for processing data from an implantable medical device (IMD), the method comprising:

sensing physiological episodes;

storing data associated with the physiological episodes in the IMD; and

reporting the stored data on a schedule that is based on a pattern of recurrence of the physiological episodes, wherein reporting the data on the schedule that is based on the pattern of recurrence of the physiological episodes comprises;

determining a dominant frequency of repetition of the physiological episodes; and

establishing the schedule for transmission of the data based on a multiple of the dominant frequency of repetition of the physiological episodes.

2. The method of claim 1, and further comprising providing an output based on the pattern of recurrence of the physiological episodes.

3. The method of claim 2, wherein providing an output based on the pattern of recurrence of the physiological episodes comprises reporting a change in the pattern of recurrence of the physiological episodes.

4. The method of claim 2, wherein providing an output based on the pattern of recurrence of the physiological episodes comprises administering therapy based on pattern of recurrence of the physiological episodes.

5. The method of claim 1, wherein determining a dominant frequency of repetition of the physiological episodes comprises performing a fast Fourier transform (FFT) on the data.

6. The method of claim 1, further comprising modifying settings in the IMD based on the pattern of recurrence of the physiological episodes.

7. The method of claim 6, wherein modifying settings in the IMD based on the pattern of recurrence of the physiological episodes comprises adjusting therapy administered by the IMD based on the pattern of recurrence of the physiological episodes.

8. The method of claim 6, wherein modifying settings in the IMD based on the pattern of recurrence of the physiological episodes comprises adjusting a resolution of data stored in the IMD based on the pattern of recurrence of the physiological episodes.

9. The method of claim 1, further comprising categorizing the data based on a frequency and duration of recurrence of the physiological episodes.

10. The method of claim 1, further comprising adaptively varying the schedule based on the pattern of recurrence of the physiological episodes.

11. The method of claim 1, further comprising determining whether the pattern of recurrence of the physiological episodes has changed since a prior reporting period, and generating an alert when a change in the pattern of recurrence occurs.

12. The method of claim 1, wherein the physiological episodes comprise arrhythmia episodes.

13. The method of claim 12, wherein the data comprises information relating to a frequency of occurrence of arrhythmia episodes.

14. The method of claim 1, wherein the data comprises information relating to an arrhythmia burden.

15. The method of claim 1, wherein the schedule is predetermined.

16. A method for processing data from an implantable medical device (IMD), the method comprising:

sensing physiological episodes;

storing data associated with the physiological episodes in the IMD;

reporting the stored data on a schedule that is based on a pattern of recurrence of the physiological episodes; and

modifying settings in the IMD based on the pattern of recurrence of the physiological episodes, wherein said modifying settings in the IMD comprises adjusting a resolution of data stored in the IMD based on the pattern of recurrence of the physiological episodes.

17. A method for processing data from an implantable medical device (IMD), the method comprising:

sensing physiological episodes;

storing data associated with the physiological episodes in the IMD;

reporting the stored data on a schedule that is based on a pattern of recurrence of the physiological episodes; and

determining whether the pattern of recurrence of the physiological episodes has changed since a prior reporting period, and generating an alert when a change in the pattern of recurrence occurs.

18. A method for processing data from an implantable medical device (IMD), the method comprising:

sensing physiological episodes;

storing data associated with the physiological episodes in the IMD;

detecting or determining a pattern of recurrence of the physiological episodes; and

reporting the stored data on a schedule that is based on the detected or determined pattern of recurrence of the physiological episodes.