US20070168005A1 Medical device with an electrically conductive anti-antenna member

摘要

• 问题:MRI诱导的RF电流导致植入导线周围组织过热和起搏功能失效
• 方案:在导线中集成LC谐振电路，通过与MRI激励频率共振产生高阻抗屏蔽RF诱导电流
• 效果:64MHz/128MHz下，加谐振电路可将导线远端诱导电流大幅降低(从±0.85A显著减小)；远端配置时温度升幅约0.9°C/3.75min
• 形态:21条权利要求；谐振频率(L/C值调整)、电路位置(近端/远端)、单/多电路配置、限流电阻等维度可调

关联

• 原文(Google Patents):https://patents.google.com/patent/US20070168005A1/en
• 危害:Hazard-rf-heating
• 危害:Hazard-rf-malfunction