Purse-string transoral outlet reduction (TORe) is effective at inducing weight loss and improvement in metabolic comorbidities after Roux-en-Y gastric bypass

Abstract

Abstract Background and study aims Transoral outlet reduction (TORe), performed using a traditional interrupted or a recently described purse-string suture pattern, is effective at inducing short- and mid-term weight loss in patients with weight regain after Roux-en-Y gastric bypass (RYGB). We aimed to determine the technical feasibility and safety of purse-string TORe and to assess its impact on weight and metabolic profiles. Patients and methods RYGB patients undergoing purse-string TORe were included. The gastrojejunal anastomosis (GJA) was ablated using argon plasma coagulation or dissected using endoscopic submucosal dissection. A suture was used to place stitches around the GJA in a continuous ring fashion. The suture was cinched over a balloon (8 – 12 mm). The primary outcome was technical feasibility. Secondary outcomes were the percentage of total body weight lost (%TWL), adverse events, impact on comorbidities, and predictors of weight loss. Results 252 RYGB patients underwent 260 purse-string TORes. They had regained 52.6 ± 46.4 % of lost weight and weighed 107.6 ± 24.6 kg. The technical success rate was 100 %. At 6 and 12 months, %TWL was 9.6 ± 6.3 and 8.4 ± 8.2. Two serious adverse events (0.8 %) occurred: gastrointestinal bleeding and GJA stenosis. At 12 months, blood pressure, hemoglobin A1c, and ALT had improved. Prior weight regain was associated with %TWL at 12 months (β = 0.07, P = 0.007) after controlling for BMI, pouch size, and number of purse-string rings. Conclusion Purse-string TORe to treat weight regain after RYGB is technically feasible and safe. Additionally, it is associated with improvement in weight and comorbidity profiles up to 12 months post-procedure.