CONTINUOUS epidural or peridural anesthesia or block often is of definite value in the diagnosis, treatment, and postoperative management of patients with various types of peripheral vascular disease of the lower extremity. We have utilized this method of sympathetic block in 49 patients during the past two years. The purpose of this communication is to review the historic background, describe the technic, and report our experience with epidural block. History The potentialities of instilling anesthetic agents into the peridural space were first appreciated by Corning," in 1885. He introduced cocaine solutions into this space in the dog. Although he is reported to have used this as a therapeutic measure in human beings, it is not certain whether he used an epidural or an intradural puncture. Cathelin,8 in 1900, is thought to be the first to introduce anesthetic agents into the sacral canal for surgical purposes and Pages,29 in 1921, utilized this method in the thoracic and lumbar regions. Dogliotti,13 of Italy, and Gutierrez,15 of Argentina, placed this type of anesthesia on a sound basis in 1931 and 1932, respectively. Hingson and Southworth,17 in 1942, first described the continuous method of administration into the peridural space by the caudal route, and in 1944,18 reported their experiences with the continuous lumbar method. Their administration of the anes-* Presented before the