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We conducted a study to evaluate the impact of the exclusive enteral nutrition (EEN) on perioperative outcome in Crohn's disease (CD) patients following immunosuppressive therapy.  Patients with CD followed at a referral center between January 2001 and March 2014 who underwent abdominal surgery were identified. Patients were divided into 4 groups: patients not exposed to immunosuppressive agents in the previous 8 weeks before surgery (group 1); patients received immunosuppressive medications without preoperative drug-free interval (group 2); patients had preoperative immunosuppressants-free interval (group 3); patients treated with adding EEN to preoperative immunosuppressants-free interval regimen (group 4). Urgent operation requirement, stoma creation, postoperative complications, readmission, and reoperation were compared in patients among groups.  Overall, 708 abdominal surgeries performed in 498 CD patients were identified. Three hundred seventy-six (53.11%) surgeries performed in those receiving preoperative immunosuppressive medications. Compared with other groups, group 2 had increased postoperative complications, more frequent urgent operation, and higher rate of stoma creation. Patients in group 4 were found to have better outcome including lower rate of stoma creation ( P  < 0.05), and decreased incidence of postoperative complications ( P  < 0.05) compared with group 2 and group 3. Additionally, decreased urgent operation requirement ( P  < 0.05) and extended preoperative drug-free interval ( P  < 0.001) were observed in the group 4 than those in the group 3.  Preoperative optimization of CD following immunosuppressive therapy by EEN prolongs the immunosuppressants-free interval, reduces the risk of urgent surgery and reoperation, and most importantly, decreases complications after abdominal surgery.

Role of Exclusive Enteral Nutrition in the Preoperative Optimization of Patients With Crohn's Disease Following Immunosuppressive Therapy