Zhu Longyu, Xie Yunwen (Institute of Traditional Chinese Medicine, Shanxi)
There are many factors which affect the result of acupuncture anesthesia. Up to date, there is still no conclusion about the exact effective region of acupuncture and definite parameter for electric stimulation in acupuncture analgesia. Therefore we carried out a series of preliminary studies both in animals and human bodies. The results are as follows.
1. Experimental observation on the electro-acupuncture wave type and frequency in the animal analgesia.
The potassium iontophoresis method was used as to examine the pain-threshold of the abdominal wall. Dealing with needling of "Zusanli", 106 experiments on the electro-acupuncture analgesia efficacy with 10 different wave type devices were performed. We found that the analgesia effect in the sine wave type with the frequency of 10,000 Hz. and 750 Hz., or the noise wave type with 80 cycles/sec. are better. The result showed that there is a relative specificity to the analgesic efficacy with the wave type and frequency used.
2. The analgesic efficacy of electroacupuncture in different points of the body.
(1). The electro-acupuncture of "Zusanli", "Chizhong" and "Shendao" was carried out in mouse. Comparison was made between these three groups. We found that "points" on the back were more effective than those on the lower limbs. Besides, the analgesic effect appeared more rapid, with relatively shorter induction time and recovery period.
(2). There was no difference in the analgesic effect of electro-acupuncture between the plexuses brachialis point and "Hegu" point. The pain thresholds elevated in both groups and have a tendency of neck>chest>abdomen>lower limbs> upper limbs. The result was similar to what we had observed in the clinic. Further researches have to be made to show whether there is any relationship between the acupuncture point and the segmental distribution of the nerves.
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