Single Anastomosis Sleeve Ileal Bypass (SASI Bypass): Short-Term Outcomes and Concerns

Obes Surg. 2021 May;31(5):2339-2343. doi: 10.1007/s11695-020-05145-4. Epub 2021 Jan 6.


Background: Single anastomosis sleeve ileal (SASI) Bypass has recently emerged as a novel surgical technique. The purpose of this study is evaluating the efficacy and feasibility of our SASI technique.

Methods: Between April 2018 and February 2020, 83 patients underwent SASI bypass at our center. A retrospective analysis was performed. Forty-three patients (51.8%) completed follow-up at 12 months.

Results: Average BMI at 12 months, change in BMI, and %EWL were 28.2 ± 4.5 kg/m2, 13.5 ± 5.7 kg/m2, and 85.6% respectively. From the 25 patients evaluated, diabetes remission occurred in 95.8% of them. There were 4 (4.8%) Clavien-Dindo (CD) I, 5 (6.0%) CD II, and 2 (2.4%) CD IIIb complications.

Conclusions: SASI bypass offers excellent weight loss and comorbidities resolution. As expected, higher-quality studies are needed.

Keywords: Bariatric surgery; Bipartition; Diabetes; Metabolic surgery; SASI bypass; Single anastomosis sleeve ileal; Surgery.

MeSH terms

  • Gastrectomy
  • Gastric Bypass*
  • Humans
  • Laparoscopy*
  • Obesity, Morbid* / surgery
  • Retrospective Studies
  • Treatment Outcome
  • Weight Loss