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En bloc kidney and whole pancreaticoduodenal transplantation with bladder drainage in the rat: Microsurgical technique and outcome

A microsurgical technique for en bloc kidney and whole pancreaticoduodenal transplantation with bladder drainage employing triple vascular anastomoses without the need for a vascular cuff is described. Nineteen combined isografts were performed using this technique in inbred male Lewis (RT1:l) rats with streptozotocin‐induced diabetes. Six recipients died within 1 month from early complications (two from uremia, two from pancreatitis, one from bleeding, one from peritonitis); the other 13 survived more than 1 month after transplantation with both the pancreas and kidney grafts functioning. Four of the 13 rats died after 1 month (one from uremia secondary to an obstructed ureter, one from unexplained uremia, one from peritonitis after a biopsy, and one of unknown causes). The pancreas isografts of two animals were excised at 1 and 3 months to confirm dependence on the graft; both animals became hyperglycemic after graft pancreatectomy and had immediate declines of urine amy‐lase activity to normal. One animal was sacrificed at 3 months to determine the insulin content of its native and transplanted pancreas; insulin was very low in the former and normal in the latter. The remaining rats survived with both grafts functioning for at least 6 months (normoglycemic, high urinary amylase levels, normal or near‐normal plasma creatinine concentrations), before being sacrificed within the context of other experiments and for histological observations. Both the kidney and pancreas isografts were well preserved microscopically. En bloc pancreas and kidney transplantation with bladder drainage of excretions from both grafts is technically possible, and the success rate with our method is sufficiently high that studies designed to answer questions relevant to combined pancreas and kidney transplantation can be carried out. © 1993 Wiley‐Liss Inc.