Single Anastomosis Duodeno-Ileal Switch (SADIS): A Systematic Review of Efficacy and Safety

Abstract

Background

Owing to the possibility of weight regain after the long-term follow-up of gastric bypass patients and because of the high morbidity of biliopancreatic diversion with duodenal switch, single-anastomosis duodeno-ileal switch (SADIS) has emerged as a rescue procedure in bariatric surgery.

Objective

The purpose of this review is to summarize the literature data on SADIS.

Setting

University Hospital, NY.

Methods

A comprehensive literature review was performed through October 2016 to identify English studies on SADIS performed in human subjects. Outcomes of interest were technical considerations, postoperative complications, weight loss outcome, comorbidity resolution rate, and nutritional deficiency after SADIS.

Results

A total of 12 studies including 581 SADIS patients (217 males and 364 females) were included. SADIS was a primary procedure in 508 patients (87.4%) and a conversion procedure in 73 patients (12.6%). The length of common limb was 300 cm in 54.2%, 250 cm in 23%, and 200 cm in 13.4% of patients. Anastomosis technique was a linear stapler in 26.7% and a hand sewn suture technique in 73.3% of patients. Diarrhea was the most common complication (1.2%). The average %EWL was 30% at 3 months, 55% at 6 months, 70% at 1 year, and 85% at 2 years. Co-morbidity resolution rate was 74.1% for type 2 diabetes mellitus, 96.3% for hypertension, 68.3% for dyslipidemia, 63.3% for obstructive sleep apnea, and 87.5% for GERD. Overall, vitamin A, selenium, and iron deficiency were the most common nutritional deficiencies with the possibility of the protein malnutrition in up to 34% of the patients when measured.

Conclusion

As a modified bariatric procedure, SADIS has promising outcomes for weight loss and comorbidity resolution in morbidly obese patients. When measured, there was a high prevalence of macro-nutrient deficiencies following SADIS. There is a high technical variability, and long-term data are required before any meaningful conclusion can be made.

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Acknowledgements

We are extending our appreciation to Anabela Rodrigues for her endeavors in preparation of this manuscript.

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Correspondence to Alan A. Saber.

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Shoar, S., Poliakin, L., Rubenstein, R. et al. Single Anastomosis Duodeno-Ileal Switch (SADIS): A Systematic Review of Efficacy and Safety. OBES SURG 28, 104–113 (2018). https://doi.org/10.1007/s11695-017-2838-8

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Keywords

  • Single-anastomosis duodeno-ileal switch (SADIS)
  • Ileoduodenal switch
  • Duodeno-ileal bypass
  • Biliopancreatic diversion
  • Bariatric surgery
  • Systematic review