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Technique or technology? Evaluating leaks after gastric bypass.

Oliver A Varban1, Ruth B Cassidy2, Kyle H Sheetz1

  • 1Department of Surgery, University of Michigan Health Systems, Ann Arbor, Michigan.

Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery
|November 4, 2015
PubMed
Summary

Leak rates after laparoscopic gastric bypass surgery decreased over time. While anastomosis type and stapler manufacturer were not linked to leaks, buttressing material increased leak risk, and fibrin sealant decreased it.

Keywords:
Bariatric surgeryButtressing reinforcementComplicationsFibrin sealantOutcomes

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Area of Science:

  • Bariatric Surgery
  • Gastrointestinal Surgery
  • Surgical Outcomes

Background:

  • Anastomotic and staple-line leaks are significant complications following bariatric surgery, impacting patient morbidity and mortality.
  • The relationship between surgical techniques, devices, and leak occurrence in gastric bypass procedures is not well-established.

Purpose of the Study:

  • To investigate the association between surgical technique, devices, and the incidence of leaks after laparoscopic Roux-en-Y gastric bypass.
  • To identify specific surgical factors that may contribute to or mitigate leak development.

Main Methods:

  • A multi-centered case-control study analyzed data from the Michigan Bariatric Surgery Collaborative (2007-2011).
  • Patients with leaks (n=71) were matched 1:2 to a control group (non-leak) based on key demographic and procedural variables.
  • Operative notes were reviewed to assess technique-specific and device-specific factors.

Main Results:

  • A significant downward trend in leak rates was observed during the study period.
  • Anastomosis type (circular stapler, hand-sewn, linear stapler) and stapler manufacturer showed no significant association with leaks.
  • Use of buttressing material was associated with a higher leak rate (OR: 8.79), while fibrin sealant use was associated with a lower leak rate (OR: 0.11).

Conclusions:

  • Leak rates following laparoscopic gastric bypass have declined in Michigan, irrespective of technique and device variations.
  • While anastomosis type and stapler manufacturer were not significant predictors of leaks, buttressing material use correlated with increased leaks, and fibrin sealant with decreased leaks.
  • Prospective studies are needed to validate the benefits of operative devices, considering the complex interplay with surgeon technique and skill.