Early experience and short-term outcomes of single-port one-anastomosis transit bipartition: a single-center case series

This is the authors' abstract. We don't add key points for this paper.

One-anastomosis transit bipartition (OATB) has emerged as a metabolic procedure that combines functional restriction and diversion mechanisms while preserving endoscopic access to the remnant stomach. With increasing interest in minimally invasive approaches, the application of single-port laparoscopy in bariatric surgery has gained attention. However, the feasibility of performing one-anastomosis transit bipartition through a single-port approach remains rarely reported. We conducted a retrospective analysis of 16 patients who underwent single-port one-anastomosis transit bipartition (SP-OATB) between February 2024 and January 2026 at a single center. All procedures were conducted by the same surgical team. Baseline demographic and metabolic data were collected. Weight-loss outcomes, metabolic parameters, perioperative outcomes, and cosmetic results assessed by the Scar Cosmesis Assessment and Rating (SCAR) scale were evaluated during follow-up. Among patients with available follow-up data, mean total weight loss (TWL%) and excess weight loss (EWL%) at 12 months were 33.07% and 90.21%, respectively. Improvements in several metabolic parameters, including fasting plasma glucose and HbA1c, were observed during follow-up. No major postoperative complications, reoperations, or readmissions occurred. At the 1-month follow-up, the mean SCAR score among the 14 evaluated patients was 4.2 ± 3.4. SP-OATB appears technically feasible and was associated with favorable perioperative outcomes in selected patients, with no major postoperative complications, reoperations, or readmissions observed in this series. Encouraging early weight-loss outcomes and cosmetic outcomes were also observed. Larger prospective studies with longer follow-up are needed to further evaluate the efficacy and reproducibility of this approach.