A Randomised Controlled Trial to Assess the Benefit of Posterior Rhabdosphincter Reconstruction in Early Urinary Continence Recovery after Robot-assisted Radical Prostatectomy

Abstract

Posterior rhabdosphincter reconstruction (PRR) has been proposed to improve early urinary continence (UC) recovery after radical prostatectomy (RP). In order to generate level 1b evidence, we designed a double-blind randomised controlled trial powered to detect a 20% increase in early UC recovery after robot-assisted RP (RARP). A group of 153 patients with cT1c–3a N0M0 prostate cancer were randomised (73 to control arm and 80 to PRR arm) and 152 completed 12-mo follow-up. For UC defined as no pad use, the recovery hazard ratio at 1-mo follow-up was 2.312 (95% confidence interval [CI] 1.081–4.937; p = 0.030). UC recovery was observed in 33.8% of patients in the PRR arm and 18.1% of patients in the control arm (p = 0.022). At 3-mo follow-up the corresponding rates were 58.8% and 43.1% (p = 0.038). The median time to UC recovery was 106 d (95% CI 73–139) in the control arm and 64 d (95% CI 39–89) in PRR arm (p = 0.897). No differences in pathological outcomes or early and late surgical complications were observed between the arms. We conclude that PRR is safe and increases early UC recovery after RARP. Patient summaryWe investigated reconstruction of a muscular ring that controls the flow of urine, called the rhabdosphincter, after removal of the prostate in robot-assisted surgery. The procedure is safe and increases early recovery of urinary continence.This trial is registered at ClinicalTrials.gov as NCT03302169.