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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

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A wireless energy transfer platform, integrated at the bedside.

Hans De Clercq, Robert Puers

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|October 11, 2013

Summary

This study introduces a bedside wireless power transfer system for wearable sensors, enabling long-term vital signal monitoring. The platform efficiently powers sensors and minimizes radiation exposure for patients.

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Area of Science:

Biomedical Engineering
Electrical Engineering
Wearable Technology

Background:

Continuous patient monitoring requires reliable power for wearable sensors.
Existing power solutions for wearable medical devices face limitations in longevity and patient comfort.
Wireless power transfer offers a promising alternative for untethered medical monitoring.

Purpose of the Study:

To design and evaluate a bedside wireless energy transfer platform for wearable sensor networks.
To enable extended, uninterrupted recording of vital signals using wirelessly powered sensors.
To ensure patient safety by minimizing radiation exposure and adhering to specific absorption rate standards.

Main Methods:

Development of a bedside platform with a matrix of inductive power transmitters operating at 6.78MHz.
Optimization of magnetic link for efficient power transfer (3.3mW at 100mm distance) with 26% total efficiency.
Implementation of dynamic sensor node positioning detection and selective magnetic field induction.

Main Results:

Successful demonstration of wireless power transfer to a wearable sensor network.
Achieved a power transfer capability of 3.3mW at a 100mm inter-coil distance with 26% efficiency.
Validated the platform's ability to track and selectively power moving sensor nodes, reducing unnecessary radiation.

Conclusions:

The designed wireless energy transfer platform effectively powers bedside wearable sensors for long-term vital sign monitoring.
The system's dynamic power delivery and radiation management enhance patient safety and comfort.
This technology represents a significant advancement in untethered, continuous medical monitoring solutions.