Since Sicard, Cathlin and Tuffier performed the first sacral extradural anesthetic technique in 1901, surprisingly increased interest in this technique and basic investigation has been done concerning the anatomy, the physiology, and the fate of the local anesthetic in the body, after in jection in the epidural space. Recently, a decreasing interest in peridural anesthesia and nerve block thechniques have resulted from the availability of more efficacious and more safe volatile anesthetics. However in case of contraindication of both general and spinal anesthesia, this caudal anesthesia should be available and very usefull. Authers have undertaken to evaluate the circulatory effect of caudal anesthesia with the injection of lidocain into the epidural space through the sacral hiatus. Ten cases were selected and observed the change of the cardiovascular system before and after caudal anesthesia. The changes of the heart rate and systolic blood pressure between pre-and post anesthesia were insignificant statistically.