Current status of the kidney-pancreas transplant
Abstract
Pancreas transplantation is an alternative treatment for diabetes. Its modalities and indications are the following: 1) simultaneous pancreas and kidney transplantation: type 1 diabetes mellitus patients with end-stage diabetic nephropathy (in replacement treatment or close to it); 2) pancreas transplantation after kidney: type 1 diabetes mellitus patients with a functioning kidney transplant; 3) isolated pancreas transplantation: type 1 diabetes mellitus patients with unperceived hypoglycemia requiring hospitalization or rescue by third parties. Some of the screened type 2 diabetes mellitus patients may be pancreas transplantation candidates. Choosing a donor is very important: the ideal donor should be a deceased one who died due to intracranial injury, under 45 years of age, weighing between 30 and 90 kg, with a BMI below 30kg/m2, hemodynamically stable and having no history of cardiopulmonary arrest or sustained hypotension. There exist various strategies to divert the endocrine function (systemic and portal) and the exocrine function (vesical or enteric), systemic and enteric diversion being the most commonly used. Among the techniques which stand out during perioperative management, we could mention maintaining a good tissue perfusion, a strict glycemic control, an antiaggregation/anticoagulation plan to prevent graft thrombosis and antibiotic, antifungal and antiviral prophylactic treatment. Classic immunosuppression schemes consist of induction with T cell depleting steroids and antibodies and keeping a three-drug treatment including steroids, tacrolimus and mycophenolate. Banff classification draws a distinction between cellular and humoral rejection. The basis for cellular rejection treatment includes steroid-pulse therapy and T-cell depleting antibodies, while humoral rejection requires plasmapheresis and endovenous immunoglobulin. The main postoperative complications are bleeding, pancreatitis, graft thrombosis and anastomosis fistula. As for the results, the survival rate 5 years after pancreas transplantation is 90% for patients and 77% for pancreatic grafts. Isolated transplantation presents a lower long-term survival of the graft. In Argentina, between 60 and 80 pancreas transplants are performed every year. INCUCAI regulations provide for early registration on the waiting list for patients suffering from end-stage nephropathy with a creatinine clearance lower than 30 mL/min.
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