Objective : to discuss the effects of morphine extradural acesodyne through pre using indomethacin suppository before operation .
目的：探讨术前预用吲哚美辛栓对吗啡硬膜外止痛效果的影响。
Conclusion : blocking effect of high frequency ac signal to nerve action potential conduction can potentially provide new methods for clinical applications of electrical nerve block in local anesthesia , acesodyne and spasmolysis .
