Postoperative complications and determinant of selecting non intracorporeal urinary diversion in patients undergoing robot-assisted radical cystectomy: an initial experience.

Background: Robot-assisted radical cystectomy (RARC) with urinary diversion has become a standard surgical procedure because of its three-dimensional high-definition surgical field of view, flexibility, and stability. However, because of the highly complex steps of surgery, postoperative complications cannot be ignored. Methods: This retrospective, single-center, observational cohort study investigated the postoperative complications following RARC at a non-high-volume center in Japan. From August 2019 to March 2023, 50 consecutive patients who underwent RARC for histologically proven muscle-invasive bladder cancer (MIBC) or high-risk non-MIBC with an indication for radical cystectomy according to the Japanese Urological Association Guideline 2019 were included. Factors correlated with the selection of extracorporeal urinary diversion (ECUD) or cutaneous ureterostomy rather than intracorporeal urinary diversion (ICUD) for urinary diversion were also investigated. Results: In total, 33 (66%) and 31 (62%) patients experienced complications during the first 90 and 30 days after RARC, respectively. Among them, 19 (38%) and 18 (36%) patients developed Clavien-Dindo classification G2 complications, and 12 (24%) and 11 (22%) developed G3 or higher (major) complications during the first 90 and 30 days after RARC, respectively. The most common complications were gastrointestinal complications (26%) and urinary tract infections (22%). Nine patients (18%) underwent surgical intervention within 90 days of undergoing RARC. Higher infusion volume during the operations was significantly correlated with the occurrence of major complications within 90 days (P=0.025) and 30 days (P=0.0158) after RARC. Nineteen patients (38%) underwent non-ICUD. Twelve patients received ECUD as an ileal conduit or neobladder, and among them, three patients received ECUD due to intraabdominal adhesion for previous abdominal surgery or radiation, while four patients received ECUD ileal conduit due to comorbidities and advanced cases (palliative surgery) to shorten the surgery time. Conclusions: Surgical complications related to the initial experience with RARC at a non-high-volume center in Japan cannot be ignored. Although this complicated surgical procedure requires a learning curve to achieve a stable rate of much fewer major complications after RARC, careful assessment of patients' status before surgery and critical postoperative management may reduce complication rates more quickly, even at non-high-volume centers.