Different methods of hilar clamping during partial nephrectomy: Impact on renal function

Objectives To evaluate the impact of different hilar clamping methods on changes in renal function after partial nephrectomy. Methods We analyzed the clinical data of 369 patients who underwent partial nephrectomy for a single renal tumor of size ≤4.0 cm and a normal contralateral kidney. Patients were separated into three groups depending on hilar clamping method: non‐clamping, cold ischemia and warm ischemia. Estimated glomerular filtration rate was examined at preoperative, nadir and 1 year postoperatively. Percent change in estimated glomerular filtration rate was used as the parameter to assess the renal functional outcome. Results Percent change in nadir estimated glomerular filtration rate in the non‐clamping group was significantly less compared with the cold ischemia and warm ischemia groups (P