Cutaneous ureterostomy following robot-assisted radical cystectomy: a multicenter comparative study of transperitoneal versus retroperitoneal techniques

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BACKGROUND: The aim of this study was to evaluate the differences in perioperative outcomes between transperitoneal and retroperitoneal techniques in cutaneous ureterostomy (CUS). METHODS: Between 2018 and 2023, 55 patients underwent CUS following robot-assisted radical cystectomy. Among the 55 patients, we compared 33 patients who underwent transperitoneal CUS (t-CUS) and 22 who underwent retroperitoneal CUS (r-CUS). RESULTS: Compared with the r-CUS group, the t-CUS group had significantly shorter operative times (p < 0.001); significantly less estimated blood loss (p < 0.001); and significantly lower incidence of complications (Clavien-Dindo classification grade ≤ 2) within 30 days (p = 0.005). Unexpectedly, the incidence of ileus within 30 days was lower, though the difference was not statistically significant (p = 0.064). During the median follow-up period of 24.3 months, no ileus was observed in either group after 30 days postoperatively. There was no significant difference in the stent-free rate between the groups (p = 0.449). There were also no significant differences in the rates of change in estimated glomerular filtration rate from preoperatively at 3, 6, 12, and 24 months postoperatively between the groups (p = 0.590, p = 0.627, p = 0.741, and p = 0.778, respectively). CONCLUSIONS: Compared with r-CUS, t-CUS was associated with a shorter operative time and lower incidence of perioperative complications, including gastrointestinal complications. We believe that t-CUS can be performed safely and effectively.

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