The Impact of the Length of the Common Intestinal Loop on Metabolic and Nutritional Outcomes of Patients with Severe Obesity Who Undergo of Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy: 5-Year Follow-Up

Single Anastomosis Duodeno-Ileostomy with Sleeve Gastrectomy/Single Anastomosis Duodenal Switch (SADI-S/SADS) IFSO Position Statement-Update 2023

The single anastomosis duodeno-ileostomy with sleeve gastrectomy/single anastomosis duodenal switch (SADI-S/SADS) has gained attention as an alternative to the traditional biliopancreatic diversion with duodenal switch (BPD-DS). In 2021, IFSO endorsed SADI-S/SADS as a safe and effective procedure, underscoring the necessity for long-term multidisciplinary care and randomized controlled trials (RCTs). A task force was established to conduct a systematic review of current evidence on SADI-S/SADS to guide clinical practice. A systematic review was conducted across three databases, focusing on studies examining SADI-S/SADS and its outcomes. A total of 93 studies were analyzed. SADI-S/SADS demonstrated efficacy in weight loss and medium-to-long-term control of type 2 diabetes mellitus (T2DM), along with positive outcomes regarding hypertension and hyperlipidemia. However, its impact on other comorbidities remains inconclusive. Frequent nutritional deficiencies were identified, particularly in fat-soluble vitamins, anemia, and hypoalbuminemia. Despite significant efforts, high-quality evidence on SADI-S/SADS remains scarce, prompting IFSO to advocate for increased registry participation, publication of long-term studies, and more RCTs. Lifelong supplementation and monitoring for nutritional deficiencies are recommended. The current position statement will be reviewed in 2 years.

Biliopancreatic diversion for severe obesity: long-term weight maintenance and occurrence of nutritional complications are two facets of the same coin

BACKGROUND

Despite the widespread clinical use of hypoabsorptive metabolic bariatric surgery, very long-term outcomes are still lacking. The aim of the study was to assess the long-term safety and efficacy of biliopancreatic diversion at 30 years in patients with class 3 obesity (BMI over 40 kg/m2).

METHODS

This retrospective single-centre study used data from a prospectively collected database on a sample of consecutive patients submitted to biliopancreatic diversion with a minimum follow-up of 30 years. Outcomes assessed included overall survival, long-term weight loss and weight maintenance, remission of obesity-related co-morbidities, and short- and long-term surgical and/or nutritional or metabolic complications.

RESULTS

Among 199 consecutive patients (136 female, 63 male) who had surgery between November 1992 and April 1994, the mean age at operation was 38 (range 14-69) years and mean preoperative BMI was 48.7 (32.0-74.3) kg/m2. At baseline, 91 of 199 patients (45.7%) had type 2 diabetes. At 20 and 30 years, 122 (61%) and 38 (19%) of the 199 patients respectively were available for follow-up. At 30 years, the overall mortality rate was 12% (23 of 199). Surgical complications were concentrated in the short-term follow-up, whereas nutritional or metabolic complications increased progressively over time. A nutritional complication was diagnosed in 73 of 122 patients (60%) at 20 years and 28 of 38 (74%) at 30 years. Weight loss and glycaemic control were maintained throughout the follow-up; mean % total weight loss was 32.8 (range 14.1-50.0) at 1 year and 37.7 (range 16.7-64.8) at 30 years. One patient presented with recurrence of type 2 diabetes at 20 and 30 years; there were no patients with new-onset type 2 diabetes.

CONCLUSION

Biliopancreatic diversion leads to good and sustained weight maintenance up to 30 years with low perioperative risk, but at the cost of a high long-term prevalence of nutritional complications.

The Efficacy and Safety of Laparoscopic Single-Anastomosis Duodeno-ileostomy with Sleeve Gastrectomy (SADI-S) in Mid- and Long-Term Follow-Up: a Systematic Review

This systematic review of 10 studies aimed to investigate the mid- and long-term results of duodeno-ileostomy with sleeve gastrectomy (SADI-S) according to the PRISMA guideline. Related articles, which reported outcomes of laparoscopic SADI-S with follow-up ≥ 3 years, were selected and analyzed. The percentage of excess weight loss (EWL) was 70.9-88.7%, and 80.4% at 6, and 10 years, respectively. The more common late complications were malabsorption (6.3%) and gastroesophageal reflux disease (GERD) (3.6%). The remission rates of hypertension, diabetes, GERD, obstructive sleep apnea, and dyslipidemia were 62.9%, 81.3%, 53.2%, 60.9%, and 69.7%, respectively. In conclusion, SADI-S is a safe and effective surgical technique with durable weight loss and a high rate of comorbidity resolution in mid and long term.

The use of a total bowel length measurement protocol may reduce reoperations and complications after single-anastomosis duodenal switch

INTRODUCTION

Most surgeons who perform single-anastomosis duodeno-ileal switches (SADI-S) use a pre-determined common channel length without measuring total bowel length (TBL). However, TBL varies between patients, and a standardized common channel length could contribute to malabsorptive complications and reoperations following SADI-S. The purpose of this study was to determine whether using a TBL measurement protocol to individualize common channel length would be associated with reduced reoperations and complications.

METHODS

A prospectively maintained data registry was retrospectively reviewed to identify all patients who underwent SADI-S between September 2017 and February 2022. In April 2021, we began using TBL measurements during SADI-S with 40% of the TBL used as the length for the common channel. Outcomes pre-TBL and post-TBL measurement protocol were compared.

RESULTS

A total of 119 SADI-S recipients (59 pre-TBL; 60 post-TBL) were included. The pre-TBL group had a higher frequency of reoperations (23.7% vs 1.7%, p < 0.001) and late complications (29.3% vs 3.3%, p < 0.001). The mean time to reoperation was 13.7 months in the pre-TBL group and 6.7 months in the post-TBL group (p = 0.347). Patients in the post-TBL group had significantly higher serum albumin levels at 3 months (4.2 g/dL vs 3.5 g/dL, p < 0.001), 6 months (4.1 g/dL vs 3.6 g/dL, p < 0.001), and 12 months (4.2 g/dL vs 3.8 g/dL, p = 0.023) postoperatively when compared to the pre-TBL group.

CONCLUSION

Using TBL measurements to individualize common channel length was associated with a significant reduction in reoperations and late complications following SADI-S.

Four-Year Nutritional Outcomes in Single-Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy Patients: an Australian Experience

Nutritional deficiencies following malabsorptive surgeries are a major concern.

PURPOSE

To present clinical-based, mid-term nutritional outcomes in single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) patients using a nutritional supplement based on the American Society for Metabolic & Bariatric Surgery (ASMBS) guidelines.

SETTING

Single private institute, Australia.

MATERIALS AND METHODS

Data from 196 patients who underwent a primary SADI-S by a single surgeon from January 2017 through March 2022 were retrospectively analysed. All patients received either original or altered formulated nutritional supplementation throughout the study. In total, three formulae, slightly different from each other, were used at three different time points to formulate the supplement.

RESULTS

In total, 196 patients were included. The average age and preoperative body mass index were 44.9 ± 6.7 years and 43.6 ± 22.5 kg/m², respectively. Nutritional follow-up was available on 77.5%, 73.2%, 73.4%, and 59.7% of patients at 12, 24, 36, and 48 months, respectively. At baseline, 48.3%, 30%, 14.9%, 13.3%, 12.4%, 3.8%, 2.3%, and 0.5% of the patients had vitamin D, calcium, folic acid, total protein, iron, vitamin B12, copper, and vitamin A deficiencies, respectively. Postoperatively, mild to moderate vitamin deficiencies were noted in 14.2% of the patients in the first 18 months; however, at 4 years, the cohort had zero nutritional deficiencies. There were no long-term complications, revisions/conversions, or mortalities related to nutritional deficiencies.

CONCLUSION

Factors, like preoperative and postoperative early, aggressive correction of nutritional deficiencies, regular laboratory monitoring and follow-ups with the multidisciplinary team, and adherence to our formulated nutritional supplement, have contributed to favourable nutritional outcomes at 4 years.