Effect of Hemodialysis before Transplant Surgery on Renal Allograft Function – A Pair of Randomized Controlled Trials
Kikić Z, Lorenz M, Sunder-Plassmann G, Schillinger M, Regele H, Györi G, Mühlbacher F, Winkelmayer WC, Böhmig GA. Transplantation. 2009 Dec 27;88(12):1377-85
Previous studies have suggested that hemodialysis immediately before transplant surgery may increase the risk of delayed graft function. In this RCT, patients were randomized to be dialyzed or not pre-transplant; patients with a potassium > 5.0 were randomized to citrate or heparin
anticoagulation. There were no differences in the incidence of DGF, acute rejection or early graft function.
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Abstract:
BACKGROUND: Hemodialysis immediately before kidney transplant surgery has been suggested to adversely affect early graft function. On the other hand, considering its profound antiinflammatory effects, a beneficial impact of regional citrate anticoagulation on the evolution of graft function can be speculated. We sought to assess the clinical impact of preoperative hemodialysis and dialysis anticoagulation in two related randomized trials. METHODS: Eligible kidney transplant candidates with a serum potassium less than or equal to 5.0 mEq/L were randomized to receive dialysis or no dialysis before deceased donor transplantation. Patients with a potassium more than 5.0 mEq/L were randomized to receive dialysis with heparin or citrate anticoagulation. The primary endpoint was the estimated glomerular filtration rate (eGFR) at posttransplant day 5. RESULTS: The first comparison (56 vs. 54 patients) revealed no effect of dialysis on eGFR at day 5 (primary endpoint, 12 [interquartile range 5-36] vs. 13 [5-37] mL/min/1.73 m2, P=0.98), rates of delayed graft function (22% vs. 27%, P=0.66), cellular rejection (20% vs. 24%, P=0.65), and C4d-positive dysfunction (2% vs. 9%, P=0.11) or 1-year death-censored graft survival (89% vs. 91%, P=0.51). Comparing citrate with heparin anticoagulation (44 vs. 66 patients), no differences in eGFR at day 5 (17 [8-31] vs. 14 [6-38] ml/min/1.73 m2, P=0.57), delayed graft function (21% vs. 30%, P=0.28), cellular rejection (23% vs. 33%, P=0.29), and graft survival (90% vs. 88%, P=0.44) were found. For citrate anticoagulation, less C4d-positive rejection episodes (P=0.08) and higher 1-year eGFR levels (P=0.03) were observed. CONCLUSION: Pretransplant hemodialysis and anticoagulation may not affect early graft function in a meaningful way.
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