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Related Experiment Video

Updated: Sep 21, 2025

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Morbid Obesity Not a Risk for Serious Complications Following Outpatient Surgery.

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Class III obesity does not increase serious surgical complications in outpatient settings. While superficial surgical site infections (SSIs) are more common, severe readmissions are rare, supporting inclusion of obese patients for routine procedures.

Keywords:
ambulatory surgery centerscholecystectomyhernianational surgical quality improvement programobesity

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Area of Science:

  • Surgical outcomes research
  • Obesity medicine
  • Ambulatory surgery

Background:

  • Patients with class III obesity are frequently excluded from ambulatory surgery centers (ASCs).
  • Concerns exist regarding increased postoperative complication risks in this patient population.
  • Evidence is needed to evaluate the safety of outpatient procedures for severely obese individuals.

Purpose of the Study:

  • To investigate whether class III obesity is a significant risk factor for serious postoperative complications in outpatient surgery.
  • To compare outcomes between patients with varying BMI classifications undergoing common outpatient procedures.
  • To inform clinical decision-making regarding the inclusion of morbidly obese patients in ambulatory surgical settings.

Main Methods:

  • Utilized the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database (2012-2018).
  • Included patients undergoing outpatient inguinal hernia repair (IHR) and laparoscopic cholecystectomy (LC).
  • Grouped patients by Body Mass Index (BMI) and compared baseline characteristics and 30-day outcomes using univariate and multivariate analyses.

Main Results:

  • Analysis included 79,916 IHR and 107,471 LC patients.
  • Obesity (all classes) was associated with increased odds of superficial surgical site infections (SSIs) for both IHR and LC (P < .0001).
  • Class II and III obesity showed higher readmission rates (<3%), but severe complications were not significantly mirrored, suggesting acceptable safety for outpatient procedures.

Conclusions:

  • Class III obesity is associated with a statistically significant increase in superficial SSIs for IHR and LC.
  • Severe complications requiring hospital readmission are infrequent in morbidly obese patients undergoing these outpatient procedures.
  • Morbidly obese patients should be considered for routine outpatient surgical procedures, as serious complications are not disproportionately increased.