【摘要】 电刀是现代手术中必备的电外科装置,然而电刀在使用时往往对监护仪器产生严重的干扰,影响对手术中病人的实时监测,使得心电波形的显示严重失真,心率计算发生错误。在模拟电路方面提出了多种创新措施,有效地解决了电刀干扰问题,可以协助医生准确快速地做出诊断。此外,针对医疗仪器中的残余调制工频干扰和基线漂移,除了使用数字梳状滤波器之外,还创新地提出一种有效的滤波算法——带锁相环的自适应梳状滤波器。这种方法滤波利用锁相环对工频信号及其倍频进行采样,不但节约成本、容易实现,而且可以跟踪电源频率,完全滤除工频干扰及其高次谐波。更多还原

【Abstract】 In modern surgeries, ESU is an important electrosurgical equipment. However, the interference caused by ESU usually affects real-time monitoring of the patient. To solve these problems, the paper introduces some new ideas in analog circuits. To the problem of interference and base-line excursion, this paper proposes an adaptive comb filter with Phase-Locked Loop(PLL), besides digital comb filters. Following the frequency of power and sampling accordingly, this method could easily clear the interference, which could make the cost reduced.更多还原