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四、胃电图的体表记录 1.电极引导电极应具有电的稳定度,要有很小的极化偏转电位,因为所记录的是相当小且频率较慢的电位变化。通常选用银-氯化银电极。电极氯化的好坏,对测量结果影响颇大。如果电极氯化不好,产生噪声,就会记录出波形来,使胃肠信号产生伪差,必须重新氯化电极。引导的方式有:①单极引导:一个有效电极和一个参考电极引导。②双极引导:两个有效电极引导。 2.电极的位置最适宜的电极安放位置应是胃
Fourth, the body surface ECG record 1. Electrode lead electrode should have the stability of the electrical, to have a small polarization deflection potential, because the recorded is relatively small and slower frequency changes. Usually silver - silver chloride electrode. Electrode chlorination is good or bad, a significant impact on the measurement results. If the electrode chlorination is not good, produce noise, it will record the waveform to gastrointestinal signal artifact, you must re-chloride electrode. Guidance methods are: ① unipolar guidance: a valid electrode and a reference electrode to guide. ② bipolar guidance: two effective electrode guidance. 2. The location of the electrode The most suitable electrode placement should be the stomach