title: The incidence of trocar-site hernia in minimally invasive bariatric surgery: a comparison of multi versus single-port laparoscopy.
abstract: BACKGROUND
  Single-port laparoscopy (SPL) employs a 1.5- to 2.5-cm incision at the umbilicus for the placement of a single working port. We hypothesized that the longer incision created by SPL compared with multiport laparoscopy may increase the incidence of trocar-site hernias. We examined our experience with SPL in bariatric operations.
  
  
  METHODS
  There were 734 laparoscopic sleeve gastrectomy and laparoscopic adjustable gastric banding procedures performed at our institution between 2001 and 2011. Fifty-eight patients were lost to follow-up or had a short duration of follow-up (<1 month). Of the remaining 676 cases, 163 were performed via SPL. All laparoscopic wounds created by trocar size greater than 12 mm were closed with absorbable suture.
  
  
  RESULTS
  Patient demographics of the SPL group and the multiport group were similar in terms of age, gender, and comorbidities. The average body mass index (BMI) of the SPL group was lower than the multiport group (43.5 ± 5.3 vs. 45.8 ± 7.7, p < 0.01). The mean follow-up for the SPL group was 11 months versus 24 months for the multiport group. There were three trocar-site hernias out of 513 cases in the multiport compared to one hernia out of 163 cases in the SPL group (0.6 vs. 0.6 %, p = 0.967). All trocar-site hernias occurred at the 15-mm port site. The median time to hernia occurrence for the multiport group was 13 months (range, 1-18). In the SPL group, the hernia occurred at 8 months. On multivariate analysis, age, BMI, SPL, procedure type, and the postoperative weight loss were not associated with the development of trocar-site hernias.
  
  
  CONCLUSIONS
  SPL did not increase the rate of trocar-site hernia in this series. A low rate of trocar-site hernia can be achieved with the use of SPL in bariatric surgery.
authors.affiliation: St. Luke's-Roosevelt Hospital Center, Institute for Bariatric and Minimally Invasive Surgery, 1111 Amsterdam Avenue, Babcock 4W, New York, NY 10025, USA. davilee@chpnet.org
authors.forename: David Y
authors.initials: DY
authors.lastname: Lee
authors.forename: Sadiq S
authors.initials: SS
authors.lastname: Rehmani
authors.forename: Hamza
authors.initials: H
authors.lastname: Guend
authors.forename: Koji
authors.initials: K
authors.lastname: Park
authors.forename: Ronald E
authors.initials: RE
authors.lastname: Ross
authors.forename: Mohammed
authors.initials: M
authors.lastname: Alkhalifa
authors.forename: James J
authors.initials: JJ
authors.lastname: McGinty
authors.forename: Julio A
authors.initials: JA
authors.lastname: Teixeira
mesh_terms: D000328:Adult; D050110:Bariatric Surgery / Q000379:methods*; D005260:Female; D006555:Hernia, Ventral / Q000453:epidemiology* / Q000209:etiology*; D006801:Humans; D015994:Incidence; D010535:Laparoscopy / Q000009:adverse effects* / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies