Cardiovascular Risk Factors After Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S): a New Effective Therapeutic Approach?

Abstract

Obesity and its associated comorbidities entail a significantly increased cardiovascular mortality. Therefore, approaching obesity control must include among its aims the reduction of the associated comorbidities and the higher cardiovascular mortality risk and not only weight loss. Many observational studies indicate that bariatric surgery (BS) is associated with a better long-term survival than standard care. Furthermore, in general, these epidemiological studies included patients who underwent gastric bypass (GB), not biliopancreatic diversion/duodenal switch (BPD/DS), so the potential additional benefit of this latter technique remains unknown. In this regard, in theory, derivative techniques are usually associated to a higher rate of long-term improvement of metabolic comorbidities, so their potential impact on cardiovascular morbidity and mortality could be even greater than what has been published up to date. In 2007, our group proposed a simplification of the bariatric technique based on the duodenal switch, which we termed “single anastomosis duodeno-ileal bypass with sleeve gastrectomy” or SADI-S. In this review, and 10 years later, we describe some of the main results of those patients who underwent this procedure, specifically regarding their outcome on metabolic comorbidities and cardiovascular risk. Considering the findings presented in this review, in which a significant improvement of all metabolic comorbidities was observed, we may confidently suggest that SADI-S seems comparable to a BPD/DS procedure in the mid-term outcome. After all, the SADI-S procedure was conceived as a simplified version of the BPD/DS technique and not necessarily intended to maximize the improvement of cardiovascular and metabolic comorbidities, which is already sufficiently optimal. In this regard, in our experience, we have encountered a new satisfactory result, which combines more pros than cons. In fact, as we have seen, after a follow-up of 3 years, the outcomes of weight loss and improvement of blood pressure, lipid profile, and insulin resistance seem to be better with SADI-S than with Roux-en-Y gastric bypass (RYGB), and this difference may be probably still relevant in the long-term evaluation. Summary: Mid-term follow-up of patients who underwent SADI-S has proven that this procedure seems, at least, as effective as other malabsorptive techniques such as BPD/DS and significantly reduces the four main cardiovascular risk factors to a higher extent than RYGB. One of the main advantages inherent to this intervention modality is that it truly simplifies any of the prior derivative procedures and that it may be specifically adapted and individualized to each patient, according to his BMI and associated metabolic comorbidities.

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