A comparison study of laparoscopic versus open gastric bypass for morbid obesity1

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Abstract
Background: Laparoscopic Roux-en-Y gastric bypass (GBP) has been previously described, but a comparative study between laparoscopic and open GBP has not been reported. The purpose of this study was to compare surgical outcomes of laparoscopic GBP with those of open GBP for treatment of morbid obesity. Study Design: From August 1998 to September 1999, we prospectively collected outcome data on 35 patients with body-mass indices between 40 kg/m 2 and 60 kg/m 2 who underwent laparoscopic GBP. Demographics, operative data, perioperative complications, and weight losses were collected and compared with those obtained from a retrospective chart review of 35 patients with body-mass indices between 40 kg/m 2 and 60 kg/m 2 who underwent open GBP before August 1998. Results: Age, gender, preoperative body-mass index, preoperative comorbidity, and earlier abdominal surgery were similar in both groups. All laparoscopic operations were completed without conversion to laparotomy. Mean operative time, operative blood loss, length of intensive care stay, and length of hospital stay were significantly less after laparoscopic GBP than after open GBP (p < 0.05). There was no 30-day mortality in either group. At 1-year followup, analysis of the percentage of excess body weight loss showed no significant difference between the two groups (p < 0.05). Conclusions: Laparoscopic Roux-en-Y gastric bypass is technically feasible and safe. Laparoscopic GBP confers the clinical benefits of laparoscopy and an initial weight loss similar to that of open GBP.