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Related Experiment Video

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A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device
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Development of ECG Monitoring System and Implantable Device with Wireless Charging.

Jae-Ho Lee1, Dong-Wook Seo2

  • 1Electronic and Telecommunications Research Institute, Daegu 42994, Korea. jhlee1229@etri.re.kr.

Micromachines
|January 11, 2019
PubMed
Summary

This study presents an implantable electrocardiogram (ECG) monitoring system with wireless charging. The device enables remote monitoring of animal ECG, battery, and temperature, reducing the need for surgery.

Keywords:
MedRadioelectrocardiogram (ECG)implantable devicewireless chargingwireless power transfer

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Area of Science:

  • Biomedical Engineering
  • Implantable Medical Devices
  • Wireless Power Transfer

Background:

  • Continuous electrocardiogram (ECG) monitoring is crucial for animal health research and diagnostics.
  • Existing implantable systems often require invasive lead wires and frequent surgical interventions for battery replacement.
  • There is a need for advanced, miniaturized, and wirelessly powered implantable devices for long-term physiological monitoring.

Purpose of the Study:

  • To develop and evaluate an implantable ECG monitoring system with integrated wireless charging capabilities.
  • To assess the performance of the system in terms of signal acquisition, data transmission, and power efficiency.
  • To miniaturize the implantable device for enhanced biocompatibility and reduced invasiveness.

Main Methods:

  • Development of a miniaturized implantable device integrating ECG sensing, temperature monitoring, and secondary cell voltage detection.
  • Implementation of wireless charging technology for continuous power supply, eliminating the need for lead wires.
  • Integration of antenna and coil into a compact 34 mm × 14 mm form factor.
  • In vivo testing in porcine models to evaluate system performance and communication range.

Main Results:

  • The implantable system successfully monitored animal ECG signals, internal temperature, and battery voltage.
  • Wireless power transfer efficiency was experimentally determined to be approximately 30%.
  • The integrated antenna and coil achieved a compact size of 34 mm × 14 mm.
  • A communication range of up to 2.4 m was achieved between the implantable device and the base station through porcine skin.

Conclusions:

  • The developed implantable ECG monitoring system offers a promising solution for remote, long-term physiological monitoring in animals.
  • Wireless charging technology effectively addresses the limitations of battery replacement surgeries, enhancing device longevity and reducing animal stress.
  • The system's miniaturization and effective communication range demonstrate its potential for various preclinical and clinical applications.