Georgia Tech develops SWANS system for in-body implant communication using body tissue

New Communication Method for Implants

A team of researchers at Georgia Tech has created a networking system named SWANS (Smart Wireless Autonomous Networking System) designed for medical implants. This system facilitates communication between implants by sending signals directly through body tissue, departing from traditional radio wave methods.

Limitations of Existing Technologies

Current implant communication primarily relies on radio protocols such as Bluetooth Low Energy and near-field communication (NFC). These technologies present significant challenges for in-body data transfer. According to Alex Abramson, a Georgia Tech engineer and co-author of the study, power consumption is a major issue, with Bluetooth components potentially reducing an implant's battery life by up to 90% when active.

Additionally, radio waves do not transmit effectively through body tissue. Bluetooth and NFC signals experience considerable attenuation, limiting effective implant-to-implant communication to distances of less than one centimeter within tissue. The size requirements for radio antennas, typically at least five millimeters for commercial Bluetooth components, also necessitate surgical implantation for larger devices, whereas smaller implants (under three millimeters) can be injected.

SWANS System Design

The SWANS system draws inspiration from the body's natural internal communication networks, specifically the nervous system. It utilizes ionic conduction, similar to how neurons communicate by moving sodium and potassium ions to create voltage differences. Instead of nerves, SWANS employs normal body tissue to transmit these signals, allowing for the collection and processing of data from multiple implants to inform specific decisions.