Detecting implantable medical device orientation change

Patent metadata

Field	Value
Publication number	US-12245876-B2
Application number	US-202318140056-A
Country	US
Kind code	B2
Filing date	Apr 27, 2023
Priority date	Jun 7, 2019
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A medical device includes a processor, an acceleration sensor, and memory. The acceleration sensor is configured to generate acceleration data that comprises a plurality of acceleration measurements. The memory comprises instructions that when executed by the processor, cause the processor to: obtain the acceleration data from the acceleration sensor; and determine, based on the acceleration data, that the medical device has flipped.

First claim

We claim:

1. A medical device comprising:
a processor;
an acceleration sensor positioned in the medical device and configured to generate acceleration data, the acceleration data comprising a plurality of acceleration measurements; and
memory having embodied thereon computer-executable instructions that are configured to, when executed by the processor, cause the processor to:
obtain the acceleration data from the acceleration sensor,
determine, based at least in part on the acceleration data, that the medical device has flipped its orientation with respect to an axis, and
apply a correction to a heart sounds algorithm in response to determining that the medical device has flipped its orientation with respect to the axis.

2. The medical device of claim 1 , wherein the instructions, when executed by the processor, cause the processor to determine that the medical device has flipped its orientation with respect to the axis in response to determining that the medical device has changed its orientation by more than a predetermined threshold.

3. The medical device of claim 2 , wherein the predetermined threshold is 90 degrees.

4. The medical device of claim 2 , wherein the predetermined threshold is 110 degrees.

5. The medical device of claim 2 , wherein the predetermined threshold is 170 degrees.

6. The medical device of claim 2 , wherein the predetermined threshold is approximately 180 degrees.

7. The medical device of claim 1 , wherein the correction comprises recalibration of the heart sounds algorithm to account for a flipped orientation of the medical device.

8. The medical device of claim 1 , wherein the heart sounds algorithm comprises detecting an S2 heart sound.

9. The medical device of claim 8 , wherein the heart sounds algorithm comprises detecting a peak of the S2 heart sound.

10. The medical device of claim 1 , wherein the medical device is an implantable cardiac monitor.

11. The media of claim 10 , wherein the correction comprises recalibration of the heart sounds algorithm to account for a flipped orientation of the medical device.

12. The media of claim 10 , wherein the heart sounds algorithm comprises detecting an S2 heart sound.

13. The media of claim 12 , wherein the heart sounds algorithm comprises detecting a peak of the S2 heart sound.

14. The media of claim 10 , wherein the medical device is an implantable cardiac monitor.

15. One or more non-transitory computer-readable media having computer-executable instructions embodied thereon, the instructions for execution by a processor of a medical device, wherein the instructions are configured to cause the processor to:
determine, based at least in part on the acceleration data obtained from an acceleration sensor, that the medical device has flipped its orientation with respect to an axis, and
apply a correction to a heart sounds algorithm in response to determining that the medical device has flipped its orientation with respect to the axis.

16. The media of claim 15 , wherein the instructions, when executed by the processor, cause the processor to determine that the medical device has flipped its orientation with respect to the axis in response to determining that the medical device has changed its orientation by more than a predetermined threshold.

17. The media of claim 16 , wherein the predetermined threshold is 90 degrees.

18. The media of claim 16 , wherein the predetermined threshold is 110 degrees.

19. The media of claim 16 , wherein the predetermined threshold is 170 degrees.

20. The media of claim 16 , wherein the predetermined threshold is approximately 180 degrees.

Assignees

• Cardiac Pacemakers Inc

Inventors

• Shute Jonathan Bennett
• Hatlestad John D
• Vanderlinde Scott R

Classifications

• A61B5/067

  using accelerometers or gyroscopes · CPC title

• A61B5/721

  using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured · CPC title

• A61N1/36535

  controlled by body position or posture · CPC title

• A61N1/36542

  controlled by body motion, e.g. acceleration · CPC title

• A61B2560/0223

  of calibration, e.g. protocols for calibrating sensors · CPC title