A140 DELAYED BLEEDING POST-ENDOSCOPIC AMPULLECTOMY FOR AMPULLARY ADENOMAS: INCIDENCE, RISK FACTORS AND MANAGEMENT OF DELAYED BLEEDING

Abstract Background The duodenal tumors of major papilla account 10% of all peri-ampullary lesions, and the majority represent adenomas, carrying malignant potential through the well-known adenoma–carcinoma sequence ([i]). Historically, surgical resection was the standard of care, but it is associated with significant risk of complications (44.7%) ([ii]). Hence, endoscopic ampullectomy became the treatment modality for selected cases. Despite the significantly lower rate of adverse events, pancreatitis and bleeding occurs in up to 25% of patients ([iii]). The rate of bleeding may be even higher, depending on periampullary lesion size and type. Factors related to delayed bleeding are poorly understood. Aims The aim of our study was to determine predicting factors for delayed post-ampullectomy bleeding. Methods We conducted a single-center retrospective study over 13 years (2010-2023). All patients who underwent an endoscopic ampullectomy were analyzed. The primary endpoint was the incidence of delayed bleeding, which was defined as a post-procedural bleeding that necessitated either a blood transfusion, ICU admission or re-intervention. Secondary outcomes included risk factors for delayed bleeding, management, and other adverse events. Results 113 patients underwent endoscopic papillectomy [mean age 66.2 ± 12.2 years; male gender 51 (45.1%)]. Mean lesion size was 27.0 ± 14.3 mm and mean procedure duration was 62.8 ± 35.6 minutes. There were 24 cases of delayed bleeding (21.2%). Of these, 6 (25%) required repeat endoscopic intervention. The average length of hospital was longer in those experiencing a delayed bleed (8.6 ± 4.9 vs 4.8 ± 2.4 days, Pampersand:003C0.001). By univariable logistic regression, the odds of delayed bleeding were greater in those with hypertension (OR 3.8, 95%CI 1.4-10.3, P=0.008) or an INR ≥ 1.2 (OR 13.3, 95%CI 3.0-58.3, P=0.001). A multivariable logistic regression analysis revealed that INR≥ 1.2 predicted delayed bleeding, with an OR of 16.1 (95%CI 3.0-85.4, P=0.001). Other adverse events included perforation (n=7, 6.3%) and pancreatitis (n=19, 16.8%). There were no deaths. Conclusions Post-ampullectomy bleeding is a common adverse event in patients undergoing ampullectomy leading to more prolonged hospital stay. History of hypertension and elevated INR above 1.2 might be related to delayed post-ampullectomy bleeding. Additional strategies to reduce post-ampullectomy bleeding should be explored. Funding Agencies None