Transcutaneous energy transfer (TET) uses a coil located on the outside of the body to generate a magnetic field. A second coil located inside the body responds to the magnetic field and provides a power source for an associated medical device. Of particular relevance to this technology is the heating and tolerance to changes in alignment between internal and external coils. Our novel approach adjusts a resonant frequency to regulate the power flow such that the implanted device receives exactly the correct amount of power without excess heating – and automatically compensates for a wide tolerance of operating conditions including coil alignment. This technology has been proven over the last 5 years and is deployed in animal monitoring devices which can operate for unlimited periods of time (www.telemetryresearch.com).
Key features:
- Compact coils with wide tolerance to changes in alignment
- Novel frequency control regulates power and minimises heating
- Large animal trials show long term viability
- Portfolio of patents – granted and pending
- Delivers 15W over 20mm gap with an efficiency exceeding 80%
- Implanted coil size 5 x 50mm providing easy implantation in a variety of sites
- Movement tolerance allows lateral misalignment of 20mm
- Temperature rise less than 4 degrees at maximum power
- Large animal trials confirm absence of tissue damage over extended use
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