Nano Energy 139 (2025)110895

Keywords:  Fractal geometry design  Wireless inductive  Motion monitoring  Self-powered  Mechanically compatible

 Spinal Cord Injury (SCI) poses a significant threat to the physical and mental well-being of patients worldwide,  with conventional therapeutic approaches demonstrating limited efficacy in restoring neural function. To address  this challenge, we propose a flexible, wireless spinal cord stimulation system equipped with spinal motion  monitoring capabilities. This system integrates a wireless flexible spinal cord stimulator and a self-powered  spinal motion monitor based on a triboelectric nanogenerator (TENG). The stimulator features fractal serpen tine stretchable electrodes, which are mechanically compatible with spinal tissue, allowing it to accommodate  spinal deformation and thereby minimizing the risk of tissue damage. The system also incorporates a wireless  receiving antenna (Rx), composed of flexible capacitors and electrodes, designed to receive periodic electrical  stimulation. The wireless stimulation is powered via electromagnetic coupling, eliminating the need for a battery  and making the system more lightweight and multifunctional. Additionally, the spinal motion monitor enables  real-time monitoring of the patient’s spinal health, transmitting data via Bluetooth to assist clinicians and pa tients in preventing secondary injuries and optimizing rehabilitation strategies. This work presents a novel in tegrated medical device system that combines wireless transmission, therapeutic intervention, and health  monitoring, offering a promising new avenue for advanced healthcare solutions.

Zhao Peng, Zhaoxuan Niu, Chengjun Zeng, Wei Zhao, Jinsong Leng, Yanju Liu

Design and functional verification of a flexible wireless spinal cord stimulator with spinal motion monitoring function.pdf