【摘要】 在心脏电生理手术中,为提高消融导管的定位精度,须对所采信号中的呼吸心跳信号进行剔除,以便于之后的数据处理。本研究在生物电场定位技术的基础上,采用了由MC1496模拟乘法器构成的同步检波解调器,通过耦合隔直、低通滤波及抑制纹波电压等方案优化了电路性能。Multisim仿真结果表明该电路检波性能良好;同时,通过胸腔电场模拟实验平台及动物实验,进一步验证了该电路在临床条件下提取呼吸心跳信号的可行性。更多还原

【Abstract】 In order to enhance the position accuracy of ablation catheter in heart electrophysiology operation,signals of respiration and heartbeat must be removed for subsequent data processing.Based on locating principle of electrical field with low frequency,synchronous detector with MC1496 has been developed in this study.In the present research,several methods are utilized to optimize the circuit performance,such as coupling and stopping direct current,low-pass filtering,as well as limiting ripple voltage etc.Through simulation results,it showed that the demodulation performance of the circuit was fine.Through simulation platform of thorax electric field and animal experiment,the circuit feasibility were further proved good for extracting signals of respiration and heartbeat.更多还原