Validation of Magnet-Free Wireless Charging and Communication for Intra-body Devices

Introduction

Cochlear implants (CIs), which electrically stimulate the auditory nerve to repair hearing in people with severe-to-profound hearing loss, have been used for more than 40 years. However, conventional CIs have major drawbacks, one of which is the use of magnets in the implanted unit of the CI to help perfect alignment of the coils that are used for RF Link between external and implanted units.

Drawbacks of Conventional CIs

Using magnets prevents CI users from accessing some medical treatment and examination methods, such as MRI, and may lead to damage on the skin. To eliminate the drawbacks of conventional CIs, including magnet utilization, we introduced the FLAMENCO concept. This concept has demonstrated that a fully implantable cochlear implant (FICI) mimicking the natural hearing mechanism of the ear is feasible.

ERC FLAMENCO Project

In the ERC FLAMENCO project, we developed the FICI as a magnet-free device. This necessitated the development of a novel wireless power and data transfer (WPDT) application to minimize transfer losses. This innovation reduces the duration for utilizing the external wireless unit to charge the implanted rechargeable battery.

Unique Features

By introducing a unique multi-mode rectifier circuit, we can charge the load for an extended coupling range while eliminating the requirement of alignment magnets. This approach reduces efficiency loss and maximizes charging efficiency.

ARIA Project

In the ARIA project, which stems from the developments within the ERC FLAMENCO project, we will perform technological and commercial validation of the WPDT unit according to market standards.

Optimization and Integration

1. Optimize the unit for fabricating a demonstrator to be integrated into the FICI.
2. Explore the potential for integration with other Active Implantable Medical Devices (AIMDs).

Conclusion

If implemented successfully, the ARIA WPDT would not only be a major step toward the commercialization of our FICI, which has already triggered interest from CI makers, users, and investors, but it could also lead to new applications of AIMDs.