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and clinically, we reported its technique and results. Technique: 1) We catch a pilot tread on the end, and scarred tissues at the end is resected to the part where the nerve fibers surely extend. 2) On the other hand, a silicone tube is cut longitudinally and the four threads in total are caught on the two ends. The nerves are sutured with atraumatic needle with OOS2 nylon thread. 3) Next, the silicone tube covered on the one end of the nerve is introduced by the pilot thread, so that the nerve is inserted in the lengh of a half of the tube, and fixed on the epineurium with the two threads caught on previously. 4) The same manipulationis done for the other end and the resected section should be fixed in surplus to attach. 5) The pilot thread is removed and the suture finishes. Experimental Methods and Their Results: We used tibial nerves of adult rabbits, then we cut them off and sutured by our new method. In 3 weeks after operation, no scar was observed near sutured line, and its histological findings reveal the throng of the fibers facting the peripheral side from the central portion. In E.M.G. findings, only fibrillation voltage was observed in 3-4 weeks after operation, but we recognized low amplitude voltage after 8-11 weeks. In 26 weeks after operation almost normal discharge is shown. Clinical Result: As we got the experimental results of our method of nerve suture, as is mentioned above, we clinically applied it to the 7 cases of injured nerves. The nerves sutured already by our method are 5 cases of median nerves and a case of ulnar nerve at the wrist, and a case of radial nerve at the upper site of the elbow. In all cases, we got satisfactory results clinically and electromyographically.

61. Experimental Study on the Hemodynamics of Spinal Cord (Part 3)