Efficiency of the Robotic Platform in Improving the Rate of Sphincter Preservation in Patients With Mid and Low Rectal Cancer.

Background: The aim of this study was to investigate whether the robotic platform can have a positive impact on the rate of sphincter preservation in patients with rectal tumors, undergoing robotic total mesorectal excision (TME), in comparison with laparoscopic or open TME. We also analyzed and compared short-term outcomes.

Methods: A prospectively collected robotic database was reviewed and compared with the trust and national data. Three groups were designed according to the surgical technique: open, laparoscopic and robotic. This includes all resections for mid and low rectal cancer which were performed with the robotic platform, over a period of 4 years, versus the trust data for the same period.

Results: Two hundred ninety-seven patients with mid and low rectal cancers were analyzed. Demographics for the groups (gender, age, and body mass index) were similar but distance from anal verge was shorter in the robotic group (7 vs. 8.5 cm, P < 0.001). The percentage of abdominoperineal resection (APR) rate was significantly lower in the robotic group (13.5% vs. 39.6% vs. 52.4% for the open group, P < 0.001). Median length of stay, complication rate, and positive circumferential resection margin (CRM) rate for the robotic group were also statistically significantly lower than those for both laparoscopic and open groups.

Conclusion: Robotic surgery for mid and low rectal cancer is safe and feasible, and could help surgeons perform ultra-low anterior resections, rather than APRs and save patients' sphincters. Positive CRM is low, which could lead to improved oncological outcomes.