Description: With improvements in graft survival and immunosuppressive therapy, the necessity of removing a kidney transplant graft for uncontrolled rejection has decreased significantly. This operation is divided into categories:
early nephrectomy, performed during the first month posttransplant, and
late nephrectomy, thereafter.
Early transplant nephrectomy may be required for primary nonfunction, vascular thrombosis, and, rarely, refractory rejection. In these cases, an
extracapsular approach, through the original transplant incision, is used.
The kidney is freed from the surrounding adhesion to obtain vascular control of the renal artery and renal vein. These structures are clamped and oversewn individually. The ureter is ligated as close as possible to the bladder and excised completely, with primary repair of the bladder. A suction drain is used if minimal oozing or lymph drainage is present.
Late transplant nephrectomy is performed most commonly for acute, irreversible rejection with failure of the renal allograft. Most of these patients have returned to dialysis, and the immunosuppressive medications are stopped. Chronic infection and HTN associated with nonfunctional grafts are also an indication for surgical removal of the kidney allograft. It may be a difficult operation, as intense inflammatory adhesions are present between the renal capsule and the surrounding tissue. In the setting of acute late rejection, the graft is usually swollen and enlarged. Hematuria may be present, and the graft is friable. Spontaneous rupture and hemorrhage have been reported. The surgical approach is through the same incision as the implantation. In contrast to early transplant nephrectomy, extracapsular dissection may not be possible with late nephrectomy. To avoid injury to extrarenal structures, such as the iliac vessels, an
intracapsular approach may be preferred. The kidney is mobilized gently from within the capsule toward the hilum. The capsule is reopened on the medial side to have access to the renal vessel high in the hilum. When the hilum is sufficiently mobilized, a strong vascular clamp is applied high in the hilum of the kidney away from the iliac vessels. After clamping the hilum en bloc, confirmation of distal pulses is obtained; then the kidney is excised over the vascular clamp. A running suture is used over the clamp, which is then released, and hemostasis is obtained. The ureter is identified and excised as close as possible to the bladder. The intracapsular dissection of the kidney may be associated with significant bleeding, as the kidney may fracture. This step should be done expeditiously to avoid excessive bleeding. The patient must have good vascular access for fluid resuscitation. Blood must be available for transfusion. After hemostasis is obtained, a low-pressure suction drain may be placed before closing.