[Evaluation of the learning curve of laparoscopic radical cystectomy for cancer: Morbidity and oncological results].

INTRODUCTION

The objective of this work was to evaluate the impact of the laparoscopic radical cystectomy learning curve on perioperative and oncological outcomes.

PATIENT AND METHODS

This is a retrospective and single-center study of all patients who underwent laparoscopic radical cystectomy for bladder cancer from February 2007 to March 2016, (93 patients) Perioperative and oncological data were collected. We used mixed statistical models to predict the number of patients needed in the learning phase. We compared the perioperative parameters of the patients in the learning phase with those of the rest of the patients. Overall survival was estimated using the Kaplan-Meier method.

RESULTS

Thirty-six patients are required for the learning phase (P1). The expertise phase begins after the 36th LRC (P2). In both phases, there was no significant difference in age, ASA score, and tumor stage (P=0.237, P=0.577, P=0.998). Mean operative time was 328.3min and 262.4min in P1 and P2 (P=0.0001), mean blood loss was 333.7mL and 194.3mL in P1 and P2 respectively (P=0.0003). The rate of major complications was high in the learning phase (P=0.042). There was no significant difference in lymph node yield, positive surgical margins and overall survival (P=0.068, P=0.194, P=0.703).

CONCLUSION

This learning experience was evaluated without compromising oncological results, but with a significantly higher rate of major complications.

LEVEL OF EVIDENCE