3D-printed implant prototype combines brain activity recording with targeted cooling

Researchers at the Leibniz Institute of Polymer Research Dresden and the Else Kröner Fresenius Center for Digital Health at TU Dresden have created a prototype 3D-printed implant that simultaneously records brain activity and cools targeted areas of the brain. This innovative technology, detailed in the journal Advanced Science, could offer alternative treatments for patients with drug-resistant focal epilepsy.

The interdisciplinary team, which also included researchers from the University of Sheffield, developed a comprehensive design framework for constructing multifunctional implants through 3D printing techniques. Utilizing this framework, the researchers fabricated a compact implant consisting of soft silicone components, fluidic channels, and electronic elements, all integrated within a driver unit that facilitates automatic monitoring and control of the device's recording and cooling functions.

Compared to previous methods, this manufacturing technique significantly reduces implant complexity, fabrication time, and device size. Initial evaluations using finite element simulations and agar-based tissue models confirmed the implant's ability to achieve rapid, stable, and localized cooling. Subsequent experiments involving rodent models of epilepsy demonstrated that the implant's 3D-printed electrodes produced electrocorticography (ECoG) recordings of similar quality to those obtained with commercial systems.

Moreover, the implant's targeted cooling effectively suppressed experimentally induced seizure-like activity. The successful implementation of the design framework underscores the potential of 3D printing in creating sophisticated, multifunctional medical implants, and lays the groundwork for future advancements towards clinical applications.