• Ahmet Vahibe, Matthew J Aizpuru, Michael G Sarr, Manpreet S Mundi, Robert A Vierkant, Travis McKenzie, Barham K Abu Dayyeh, and Omar M Ghanem.
• From the Departments of Surgery (Vahibe, Aizpuru, Sarr, McKenzie, Ghanem), Mayo Clinic, Rochester, MN.
• J. Am. Coll. Surg. 2023 Jan 1; 236 (1): 156166156-166.

BackgroundMalnutrition after bariatric operation is a rare but potentially life-threatening complication. The safety and efficacy of revisional bariatric operation in malnourished patients are not well elucidated.Study DesignWe performed a retrospective chart review of patients who underwent revisional bariatric operation for severe malnutrition at our institution between 2008 and 2020. Associations of demographic and clinical characteristics with dichotomous outcomes of interest were examined using Fisher's exact tests, Cochran-Armitage tests for trend, and two-sample t -tests when appropriate.ResultsFifty-three patients underwent revisional bariatric operation for malnutrition from 2008 and 2020. The median follow-up was 24 months. The anatomy before revision was Roux-en-Y gastric bypass (n = 40, 75%), biliopancreatic diversion with duodenal switch (n = 6, 11%), sleeve gastrectomy (n = 4, 8%), and mini gastric bypass (n = 3, 6%). The percentage of patients requiring supplemental or total nutritional support decreased from 89% preoperatively (47% on enteral feedings and 42% on total parenteral nutrition (TPN) with or without tube feeding) to 13.2% at the last encounter after revision (7.5% still requiring enteral feedings and 5.7% on TPN). There was an association between the number of prior abdominal operations and postoperative pneumonia (p 0.03) and need for blood transfusion (p 0.01). There were no associations between major complications or last encounter nutrition and any preoperative variables other than age at the time of operation. There were 2 mortalities during a median follow-up of 24 months, and both occurred more than 1 year postoperatively.ConclusionRevisional operation for severely malnourished bariatric operation patients is effective in the discontinuation of supportive nutrition. Postoperative complications are increased but not prohibitive.Copyright © 2022 by the American College of Surgeons. Published by Wolters Kluwer Health, Inc. All rights reserved.

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