Restored pelvic anatomy is preserved after laparoscopic and robot-assisted ventral rectopexy: MRI-based 5-year follow-up of a randomized controlled trial.

AIM: Our aim was to compare the long-term anatomical outcomes between robot-assisted ventral mesh rectopexy (RVMR) and laparoscopic ventral mesh rectopexy (LVMR) for external or internal rectal prolapse.

METHOD: This study is a follow-up of a single-centre randomized controlled trial (RCT). Thirty patients were randomly allocated to RVMR (n = 16) or LVMR (n = 14). The primary end-point was maintenance of the restored pelvic anatomy 5 years after the operation, as assessed by magnetic resonance (MR) defaecography. Secondary outcome measures included the Pelvic Organ Prolapse Quantification (POP-Q) measures and functional results assessed using symptom questionnaires.

RESULTS: Twenty-six patients (14 RVMR and 12 LVMR) completed the 5-year follow-up and were included in the study. The MRI results, POP-Q measurements and symptom-specific quality of life measures did not differ between the RVMR and LVMR groups. The MRI measurements of the total study population remained unchanged between 3 months and 5 years. In the Pelvic Floor Distress Inventory (PFDI-20), the RVMR group had lower symptom scores (mean 96.0, SD 70.7) than the LVMR group (mean 160.6, SD 58.9; P = 0.004). In the subscales of pelvic organ prolapse (POPDI-6) (mean 23.2, SD 24.3 vs mean 52.4, SD 22.4; P = 0.001) and the Colorectal-Anal Distress Inventory (CRADI-8) (mean 38.4, SD 23.3 vs mean 58.6, SD 25.4; P = 0.009), the patients in the RVMR group had significantly better outcomes.

CONCLUSION: After VMR, the corrected anatomy was preserved. There were no clinically significant differences in anatomical results between the RVMR and LVMR procedures 5 years after surgery based on MR defaecography. However, functional outcomes were better after RMVR.