Experimental Transplantation of Ureters Into the Intestine.

Summary. 1. A brief history of the operation is given up to the present date. 2. General surgical opinion judges that the principle of submucous transplantation described by Coffey offers best hope of success. 3. A new technique is described which is truly aseptic. The sub‐mucous principle is employed, but the necessity of incision and resuture of the muscle and peritoneum of the bowel wall is obviated. 4. Operations have been carried out on 77 dogs, with the implanta‐tion of 106 ureters. 1 5. Peritonitis as a complication is not serious; none occurred while using the completed technique; that is, 34 operations (one case originating from a gangrenous wound is not considered). 6. Pyelonephritis is not frequent and is always accompanied by some evidence of ureteral obstruction. 7. Hydronephrosis following on contracture of the cut end of the ureter still remains the greatest problem. 8. The use of ureteral catheters, though particularly well suited to the technique, produced bad results in these experiments because they blocked so easily on account of the small bore. I n animals in which large catheters could be used, it is considered the objection to their use would be removed.