Objectives: Little is known about how to perform the endoscopic ultrasound (EUS)-directed transgastric endoscopic retrograde cholangiopancreatography (ERCP; EDGE) in patients with gastric bypass using lumen-apposing metal stents (LAMS). The aim was to assess the risk factors of anastomosis-related difficult ERCP.
Methods: Observational single-center study. All patients who underwent an EDGE procedure in 2020-2022 following a standardized protocol were included. Risk factors for difficult ERCP, defined as the need of >5 min LAMS dilation or failure to pass a duodenoscope in the second duodenum, were assessed.
Results: Forty-five ERCPs were performed in 31 patients (57.4 ± 8.2 years old, 38.7% male). The EUS procedure was done using a wire-guided technique (n = 28, 90.3%) for biliary stones (n = 22, 71%) in most cases. The location of the anastomosis was gastro-gastric (n = 24, 77.4%) and mainly in the middle-excluded stomach (n = 21, 67.7%) with an oblique axis (n = 22, 71%). The ERCP technical success was 96.8%. There were 10 difficult ERCPs (32.3%) due to timing (n = 8), anastomotic dilation (n = 8), or failure to pass (n = 3). By multivariable analysis adjusted by two-stage procedures, the risk factors for a difficult ERCP were the jejuno-gastric route (85.7% vs. 16.7%; odds ratio [ORa ] 31.875; 95% confidence interval [CI] 1.649-616.155; P = 0.022), and the anastomosis to the proximal/distal excluded stomach (70% vs. 14.3%; ORa 22.667; 95% CI 1.676-306.570; P = 0.019). There was only one complication (3.2%) and one persistent gastro-gastric fistula (3.2%) in a median follow-up of 4 months (2-18 months), with no weight regain (P = 0.465).
Conclusions: The jejunogastric route and the anastomosis with the proximal/distal excluded stomach during the EDGE procedure increase the difficulty of ERCP.
Keywords: EDGE; LAMS; anastomosis; bypass; endoscopic ultrasound.
© 2023 The Authors. Digestive Endoscopy published by John Wiley & Sons Australia, Ltd on behalf of Japan Gastroenterological Endoscopy Society.