2—7 心电记录中的工频干扰测定及抗干扰方法的研究

• 作 者: 吴颖 王哲培
• 机 构: 上海医科大学,上海医科大学,
• 出 处: 医学物理
• 发表日期: 1987年Z1期
• 关键词: 电记录 工频干扰 抗干扰方法 导电橡胶 皮肤阻抗 干扰源 抗干扰特性 跟随器 驱动电路 干扰电流

现在,对心电记录中的工频干扰已经有了较清楚的认识,然而临床上,特别是长期监护,对心电记录中导联电极的要求越来越高,不仅要求不用导电膏,而且要求最好使用导电橡胶等柔软物质作电极。这样,由于电极和皮肤的接触阻抗大大提高,对心电仪器的抗50Hg干扰性能提出了苛刻的要求。Lewes等虽已提出了干电极方案,但采用的是电极后直接附跟随器的结构,其体积较大,引出的导线较多,使用就不够方便,因此

Now, the frequency of ECG interference has been clearer understanding, however, clinical, especially long-term custody, the lead electrodes in the ECG recording requirements are getting higher and higher, not only requires no conductive paste, and Requirements of the best use of conductive rubber and other soft substances for the electrode. In this way, due to the greatly increased contact resistance between the electrodes and the skin, harsh demands are placed on the anti-50Hg interference performance of the electrocardiograph. Although Lewes et al. Have proposed a dry electrode scheme, the structure of the electrode is followed by a follower. The larger the volume is, the larger the lead wire is and the less convenient it is to use it