应用于蝶腭神经节电刺激的耦合线圈设计

Coupling coil design for electrical stimulation of sphenopalatine nerve

摘要:

针对急性缺血性卒中(AIS)的治疗挑战，设计了一套面向蝶腭神经节电刺激的无线供能系统，以解决传统救治的局限性。通过采用近场的磁谐振耦合技术和具有恒流特性的S?S拓扑结构，提供稳定的电流供应；为保证恒定频率下的稳定传输，将线圈耦合控制在临界耦合点附近，以抑制频率分裂效应。系统使用直径10 mm的接收线圈，在空气和生物组织中达到25%和12%的功率传输效率(PTE)，并在接收线圈与发射线圈中心偏离5 mm内保持对准时效率的90%以上，展现了良好的未对准容差。这一创新解决方案有望满足蝶腭神经电刺激仪器的供能需求，为AIS治疗提供了新的可能。

Abstract:

In response to the therapeutic challenges of Acute Ischemic Stroke(AIS), a wireless power supply system for sphenopalatine ganglion electrical stimulation has been designed to address the limitations of traditional treatment. By employing near-field magnetic resonance coupling technology and an S-S topology with constant current characteristics, a stable current supply is provided. To ensure stable transmission at a constant frequency, the coil coupling is controlled near the critical coupling point to suppress the frequency splitting effect. The system uses a receiving coil with a diameter of 10 mm, achieving a Power Transfer Efficiency(PTE) of 25% in air and 12% in biological tissue, and maintaining over 90% of the alignment efficiency when the receiving coil deviates from the center of the transmitting coil by 5 mm, demonstrating good misalignment tolerance. This innovative solution is expected to meet the power supply needs of sphenopalatine ganglion electrical stimulation instruments, offering new possibilities for the treatment of AIS.