Abstract
CSEA offers the advantages of both spinal and epidural anesthesia: rapid onset, deep level of anesthesia and postoperative pain therapy. The technique of CSEA is divided between the single segment technique and the double segment technique. The extension of sensory block by epidural injection may have been explained by the epidural volume effect. Using this mechanism, CSEA provides many potential advantages. The analgesic level of CSEA is dependent on both spinal analgesia and epidural anesthesia. Informed of the features and the disadvantages of spinal analgesia, epidural anesthesia, and CSEA, we must use them properly.