Retroperitoneoscopic nephrectomy for benign nonfunctioning kidneys: Training and outcome

Abstract

Introduction: Between the two techniques of laparoscopic nephrectomy, retroperitoneoscopy has certain distinct advantages over transperitoneal access but may be a more difficult technique to learn. We present our experience of training novices in retroperitoneoscopic nephrectomy with a good outcome, making it a standard of care for nephrectomy at our institute. Methods: The aim of this study was to report the initial experience, learning curve, and outcome of retroperitoneoscopic nephrectomy by novices under a mentored approach. The series included four novice urologists. The data from the initial forty retroperitoneoscopic nephrectomies performed by each of them were reviewed. To assess the learning curve for retroperitoneoscopic nephrectomy, we studied changes in key operative parameters (operative time, blood loss, complications, nonprogression by novices, conversion rate) as a function of the case number. Results: Retroperitoneoscopic nephrectomies were successfully completed by novices in 88.1% (141/160) of the patients. Nine cases (5.6%) required the mentor′s help because of nonprogression, and ten cases (6%) required conversion to open nephrectomy. The median operative time of all surgeons decreased with increased surgical experience. There was some intersurgeon variation in the learning curve ranging from 10 to 30 cases, but all surgeons showed a significant reduction in operative time across consecutive sets of ten cases. Seven cases required mentor help in the initial series (7/80) and only two in later half of cases (2/80). All minor complications were also significantly less in the later series. Conclusions: The present series represents the effectiveness of training in retroperitoneoscopic nephrectomy of novices by a responsible team and with the standard protocol and surgical steps. Through effective mentoring, the steep learning curve associated with retroperitoneoscopic nephrectomy has been overcome, making it standard of care for nephrectomy at our institute.

Keywords

• Benign nonfunctioning kidney
• learning curve
• retroperitoneoscopic nephrectomy