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A Tunable Resonance Cantilever for Cardiac Energy Harvesting

  • Thomas W. SecordEmail author
  • Milad C. Audi
Article
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Abstract

Purpose

Energy harvesting from cardiac motion is an attractive means to avoid the use of batteries in implantable sensors and pacemakers. A single implantable device would ideally integrate both sensing and self-powering functionality.

Methods

This work describes a novel electromagnetic system that achieves high sensitivity detection of the heart rate while simultaneously providing adaptive energy harvesting capability using a tunable resonance cantilever mechanism.

Results

Our prototype design exhibits tunability of resonant frequency across the range of physiologic heart rates at a combination of lengths and angular orientations. Our initial prototype also produces between 3.0 \(\mu\)W and 20.6 \(\mu\)W of power at heart rates of 79–243 bpm, respectively.

Conclusions

The prototype device can harvest sufficient energy to sustain implantable cardiac devices such as a leadless pacemaker. The system in this paper has the potential to eliminate batteries in certain implantable cardiac devices and thereby improve overall patient monitoring and treatment.

Keywords

Energy harvesting Resonance Cardiology Electromagnetic induction Implantable medical devices Pacemakers 

Notes

Conflict of Interest

Thomas W. Secord is a former employee of Medtronic plc and Milad C. Audi declares that he has no conflict of interest. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Biomedical Engineering Society 2019

Authors and Affiliations

  1. 1.University of St. ThomasSt. PaulUSA

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