P697 Short- and long-term outcomes following biologic use before non-conventional stricureplasty for Crohn’s Jejunoileitis

Background Non-conventional strictureplasties, specifically the Finney and Michelassi technique, are bowel-preserving surgical techniques for diffuse jejunoileal Crohn’s Disease (CD). We investigated the association of biologic use during non-conventional strictureplasty for Crohn's jejunoileitis and its short- and long-term outcomes. Methods We conducted a retrospective review of all patients with CD who underwent non-conventional strictureplasty at our centre, e.g., side-to-side antiperistaltic strictureplasty (SSAS) according to the Finney or modified Finney technique, or side-to-side isoperistaltic (SSIS) according to the Michelassi or modified Michelassi techniques from January 2000 to October 2022. Patients were categorized into BIO and NoBIO groups based on their uninterrupted use of biologics until the moment of surgery. Our outcomes of interest were: (a)30-day complications; and (b)surgical recurrence. Statistical analysis was performed using R version 4.3.1. Results A total of 71 patients underwent non-conventional strictureplasty: 80 SSAS and 14 SSIS. Group 1 had 17 patients in which 15 SSAS and 3 SSIS were performed. Group 2 had 54 patients in which 65 SSAS and 11 SSIS were performed. Most patients also underwent concurrent Heineke-Mikulicz strictureplasty in 49 patients (69%) and concurrent small bowel resection in 53 patients (74.6%). The patients in the BIO and NoBIO groups had similar baseline characteristics (Table 1). No differences were observed in perioperative outcomes (Table 2). No difference was observed when comparing surgical recurrence rates, but a longer median time to recurrence was observed in the BIO group (4.7 vs. 4.4 years, p=0.004). Conclusion Biologic use at the time of non-conventional strictureplasty for diffuse jejunoileal Crohn’s disease is safe and is associated with a longer median time to recurrence.