Modified Mercedes Single Incision for Combined Liver Kidney Transplant: A Case Series Report

Abstract

Background: The traditional approach in combined liver-kidney transplantation involves 2 separate and sequential incisions. We describe a modification of the standard Mercedes incision that allows a single-incision operation while providing and maintaining adequate exposure to enable safe dual-allograft transplantation.

Methods: Modification of the standard Mercedes incision includes bilateral, subcostal, muscle splitting incision 4 fingerbreadths below the rib edge with a midline, cephalad incision and inferior ± medial ipsilateral extension on the side of intended iliac fossa laterality for renovascular and ureteroneocystostomy anastomosis.

Results: Five consecutive patients (3 women/2 men; mean age, 49 years; median body mass index, 29.8 kg/m²) underwent combined liver-kidney transplantation for end-stage liver disease and progressive hepatorenal syndrome via a modified Mercedes single-incision approach (at a median Model for End-stage Liver Disease of 37) without an additional kidney transplant incision, extraperitoneal exposure, or addition of wound retractors. Two out of the 5 patients experienced postoperative wound complications, including 1 with delayed wound healing and 1 with superficial dehiscence. All patients have normal dual-allograft function at or beyond 6 months posttransplantation.

Conclusions: The modified Mercedes single-incision technique is safe and feasible. Lowering the subcostal incisions with unilateral, inferomedial extension allows adequate visualization of the lower abdominopelvic area without compromising exposure of the upper abdomen for both renal and liver allograft implantation. Further studies are needed to prove the theoretical benefits of this technique.