Short-term administration of diclofenac sodium affects renal function after laparoscopic radical nephrectomy in elderly patients

Objective: Non-steroidal anti-inflammatory drugs decrease the glomerular filtration rate. However, few studies have been conducted on renal function in patients treated with non-steroidal anti-inflammatory drugs during the first week after laparoscopic radical nephrectomy. The purpose of this study is to determine whether short-term administration of non-steroidal anti-inflammatory drugs during the first week after laparoscopic radical nephrectomy is a risk factor for impaired renal function. Methods: Renal carcinoma patients undergoing laparoscopic radical nephrectomy in Nagoya University Hospital from April 2004 to July 2010 were identified in a retrospective cohort study. The 164 patients were divided into non-non-steroidal anti-inflammatory drug-treated (n = 50) and non-steroidal anti-inflammatory drug-treated (n = 114) groups. Results: Elderly patients (>60 years old) in the non-steroidal anti-inflammatory drug-treated group showed a significant correlation between the residual renal function ratio and the total dose of diclofenac sodium (r = -0.277, P < 0.05). There was no significant correlation between the residual renal function ratio and the total dose of loxoprofen sodium. The time to doubling of the serum creatinine level was significantly shorter in elderly patients treated with diclofenac sodium compared with that in patients treated with non-non-steroidal anti-inflammatory drugs (P = 0.034). These results suggest that renal ischemia induced by short-term administration of diclofenac sodium impairs renal function in elderly patients after laparoscopic radical nephrectomy. Conclusions: In the present study, we found the first evidence that short-term administration of diclofenac sodium is one risk factor for renal impairment after laparoscopic radical nephrectomy in elderly patients. To prevent renal impairment after laparoscopic radical nephrectomy in elderly patients, the use of loxoprofen sodium, which has a negligible effect on renal function compared with diclofenac sodium, is recommended.