Nerve‐sparing in salvage robot‐assisted prostatectomy: surgical technique, oncological and functional outcomes at a single high‐volume institution

Abstract

To show the feasibility, oncological and functional outcomes of neurovascular bundle (NVB) preservation during salvage robot-assisted radical prostatectomy (RARP). In the present institutional review board-approved retrospective analysis, between January 2008 and March 2016, 80 patients underwent salvage RARP, performed by a single surgeon (V.P), because of local recurrence after primary treatment. These patients were categorized into two groups depending on the degree of nerve-sparing (NS) performed: a good-NS group (≥50% of NVB preservation) and a poor-NS group (<50% of NVB preservation). A standard transperitoneal six-port technique, using the DaVinci Surgical System (Intuitive Surgical, Sunnyvale, CA, USA), was performed, and either an anterograde or a retrograde approach was used for NVB preservation. Validated questionnaires were used preoperatively (Sexual Health Inventory for Men [SHIM] and American Urological Association scores). Potency after salvage RARP was defined as the ability to achieve a successful erection with penetration >50% of the time, while full continence after salvage RARPwas defined as 0 pads used. The Kaplan-Meier method was used for survival and predictive estimations, and regression models were used to identify the predictors of potency, continence and biochemical failure (BCF). The potency rate at 12months was higher in the good-NS group (25.6% vs 4.3%; P = 0.036) regardless of previous SHIM score, and good NS tended to be predictive of potency after salvage RARP (P = 0.065). The full continence rate at 12months and BCF rate were similar in the two groups, and non-radiation primary treatment was the only predictor of continence at 12months after salvage RARP (P = 0.033). Our data support the feasibility and safety of NVB preservation for salvage RARP conducted in select patients in a high-volume institution and the subsequent better recovery of adequate erections for intercourse.