JOURNAL ARTICLE
MULTICENTER STUDY

Internal herniation after laparoscopic antecolic Roux-en-Y gastric bypass: a nationwide Danish study based on the Danish National Patient Register

Sara Danshøj Kristensen, Per Jess, Andrea Karen Floyd, Asger Eller, Anne Engberg, Lars Naver
Surgery for Obesity and Related Diseases 2016, 12 (2): 297-303
26826920

BACKGROUND: Laparoscopic Roux-en-Y gastric bypass (LRYGB) is the most common surgical treatment for morbid obesity in Denmark. Internal herniation (IH) or intermittent internal herniation (IIH) is a major late complication after LRYGB due to persistent mesenteric defects. However, the incidence of IH/IIH is still not known in Denmark.

OBJECTIVES: The primary aim of the study was to assess the incidence of IH/IIH after LRYGB performed in the period between 2006 and 2011 with a follow-up until 2013, where mesenteric defects were not routinely closed during the primary operation.

SETTING: Department of Bariatric Surgery, Koege University Hospital, Denmark

METHODS: We performed a retrospective nationwide analysis of prospectively collected data from all patients with LRYGB performed in Denmark from 2006 to 2011 based on the Danish National Patient Registry (NPR). From January 2006 to December 2011, 12,221 patients underwent an LRYGB procedure in Denmark. Relevant data from all 12,221 patients were retrieved from the NPR during the follow-up period from January 2006 to May 2013; we registered possible subsequent abdominal operations in these patients.

RESULTS: Operations were performed on 398 patients because of suspected IH/IIH; 383 of these patients had IH/IIH (3.1%; 95% CI 2.8-3.5). The estimate for the 5-year cumulative incidence of clinically significant cases with IH/IIH was 4%. The median time interval until the onset of IH/IIH after LRYGB was 15 months (range 0-67 months) in a follow-up period with a median of 38 months (range 16-87 months).

CONCLUSION: In the period from 2006 to 2011, mesenteric defects were not routinely closed during LRYGB in Denmark. The cumulative 5-year incidence of IH/IIH after LRYGB was 4% in a median follow-up period of 38 months (range 16-87) in Denmark when data was retrieved from the NPR.

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