Background and aim The International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO), being a Federation of 62 national societies, is the ideal network to monitor the number and type of procedures at a global level. The IFSO survey, enriched with a special section on revisional procedures, aims to report the number and types of bariatric procedures performed worldwide in 2016 and analyzes the surgical trends from 2008 to 2016. Methods The 2016 IFSO Survey form was emailed to all IFSO societies. Each Society was requested to indicate the number and type of bariatric procedures performed in the country. Trend analyses from 2008 to 2016 were also performed. Results The total number of bariatric/metabolic procedures performed in 2016 was 685,874; 634,897 (92.6%) of which were primary and 50,977 were revisional (7.4%). Among the primary interventions, 609,897 (96%) were surgical and 25,359 (4%) were endoluminal. The most performed primary surgical bariatric/metabolic procedure was sleeve gastrectomy (SG) (N = 340,550; 53.6%), followed by Roux-en-Y gastric bypass (N = 191,326; 30.1%), and one-anastomosis gastric bypass (N = 30,563; 4.8%). Conclusions In 2016, there was an increase in the total number both of surgical and endoluminal bariatric/metabolic procedures. Revisional procedures represent about 7% of the total bariatric interventions. SG remains the most performed surgical procedure in the world.

IFSO Worldwide Survey 2016: Primary, Endoluminal, and Revisional Procedures.

Standardization of the key measurements of a procedure’s finished anatomic configuration strengthens surgical practice, research, and patient outcomes A consensus meeting was organized to define standard versions of 25 bariatric metabolic procedures A panel of experts in bariatric metabolic surgery from multiple continents was invited to present technique descriptions and outcomes for 4 classic, or conventional, and 21 variant and emerging procedures Expert panel and audience discussion was followed by electronic voting on proposed standard dimensions and volumes for each procedure’s key anatomic alterations Consensus was defined as ≥ 70% agreement The Bariatric Metabolic Surgery Standardization World Consensus Meeting (BMSS-WOCOM) was convened March 22–24, 2018, in New Delhi, India Discussion confirmed heterogeneity in procedure measurements in the literature A set of anatomic measurements to serve as the standard version of each procedure was proposed After two voting rounds, 22/25 (880%) configurations posed for consideration as procedure standards achieved voting consensus by the expert panel, 1 did not attain consensus, and 2 were not voted on All configurations were voted on by ≥ 50% of 50 expert panelists The Consensus Statement was developed from scientific evidence collated from presenters’ slides and a separate literature review, meeting video, and transcripts Review and input was provided by consensus panel members Standard versions of the finished anatomic configurations of 22 surgical procedures were established by expert consensus The BMSS process was undertaken as a first step in developing evidence-based standard bariatric metabolic surgical procedures with the aim of improving consistency in surgery, data collection, comparison of procedures, and outcome reporting

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Standardization of Bariatric Metabolic Procedures: World Consensus Meeting Statement

Single anastomosis sleeve ileal (SASI) bypass is a newly introduced bariatric and metabolic procedure. The present multicenter study aimed to evaluate the efficacy of the SASI bypass in the treatment of patients with morbid obesity and the metabolic syndrome. This is a retrospective, seven-country, multicenter study on patients with morbid obesity who underwent the SASI bypass. Data regarding patients’ demographics, body mass index (BMI), percentage of total weight loss (%TWL), percentage of excess weight loss (%EWL), and improvement in comorbidities at 12 months postoperatively and postoperative complications were collected. Among 605 patients who underwent the SASI, 54 were excluded and 551 (390; 70.8% female) were included. At 12 months after the SASI, a significant decrease in the BMI was observed (43.2 ± 12.5 to 31.2 ± 9.7 kg/m2; p < 0.0001). The %TWL was 27.4 ± 13.4 and the %EWL was 63.9 ± 29.5. Among the 279 patients with type 2 diabetes mellitus (T2DM), complete remission was recorded in 234 (83.9%) patients and partial improvement in 43 (15.4%) patients. Eighty-six (36.1%) patients with hypertension, 104 (65%) patients with hyperlipidemia, 37 (57.8%) patients with sleep apnea, and 70 (92.1%) patients with GERD achieved remission. Fifty-six (10.1%) complications and 2 (0.3%) mortalities were recorded. Most complications were minor. All patients had 12 months follow-up. The SASI bypass is an effective bariatric and metabolic surgery that achieved satisfactory weight loss and improvement in medical comorbidities, including T2DM, hypertension, sleep apnea, and GERD, with a low complication rate.

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Evaluation of the Efficacy of Single Anastomosis Sleeve Ileal (SASI) Bypass for Patients with Morbid Obesity: a Multicenter Study.

The present study aimed to compare the outcome of single anastomosis sleeve ileal (SASI) bypass and sleeve gastrectomy (SG) in regards weight loss, improvement in comorbidities at 12 months of follow-up, and postoperative complications. This was a case-matched, multicenter analysis of the outcome of patients who underwent SG or SASI bypass. Patients who underwent SASI bypass were matched with an equal number of patients who underwent SG in terms of age, sex, BMI, and comorbidities. The main outcome measures were excess weight loss (EWL) at 6 and 12 months after surgery, improvement in medical comorbidities, and complications. A total of 116 patients (97 female) of a mean age of 35.8 years were included. Fifty-eight patients underwent SASI bypass and an equal number underwent SG. %EWL at 6 months postoperatively was similar between the two groups. SASI bypass conferred significantly higher %EWL at 12 months than SG (72.6 Vs 60.4, p < 0.0001). Improvement in type 2 diabetes mellitus (T2DM) and gastroesophageal reflux disease (GERD) after SASI bypass was better than SG (95.8% Vs 70% and 85.7% Vs 18.2%, respectively). SASI bypass required longer operation time than SG (108.7 Vs 92.8 min, p < 0.0001). Complications occurred in 12 (20.7%) patients after SG and 4 (6.9%) patients after SASI bypass (p = 0.056). The %EWL at 12 months after SASI bypass was significantly higher than after SG. SASI bypass conferred better improvement in T2DM and GERD than SG. Both procedures had similar weight loss at 6 months postoperatively and comparable complication rates.

Single anastomosis sleeve ileal (SASI) bypass versus sleeve gastrectomy: a case-matched multicenter study

Single anastomosis sleeve ileal (SASI) bypass is a new bariatric and metabolic procedure that has both restrictive and malabsorptive effects. This study was conducted to assess both the efficacy and safety of this procedure in a short-term follow-up. This retrospective cohort study examined weight loss- and obesity-related comorbidities and complications in patients who had undergone SASI bypass from October 2017 to March 2018 at a center of excellence for bariatric/metabolic surgery. Twenty-four patients had undergone SASI bypass due to some existing risk factors of gastric cancer or premalignant lesions in the esophagogastroduodenoscopy. The mean BMI of the patients was 44.2 (median 43.7, range 37.0–54.8) kg/m2. Six and 12 months after surgery, the mean (median) excessive weight loss (EWL) was 67.8% (63.3) and 86.2% (82.9) and total weight loss (TWL) was 28.5% (27.6) and 36.46% (35.8), respectively. Most patients had complete remission in type 2 diabetes mellitus (89%), arterial hypertension (86%), dyslipidemia (100%), obstructive sleep apnea (100%), and non-alcoholic fatty liver disease (73%) during the 1 year after surgery. One case of extra-luminal bleeding and one case of trocar site hernia occurred after surgery. Moreover, two patients converted to sleeve gastrectomy because of hypoalbuminemia and EWL about 1 year after SASI. SASI bypass is a newly introduced investigational procedure for improving weight loss and comorbidities; however, it may result in EWL and protein malnutrition and should only be performed for select patients and by well-experienced bariatric surgeons.

1-Year Follow-up of Single Anastomosis Sleeve Ileal (SASI) Bypass in Morbid Obese Patients: Efficacy and Concerns

Efficacy of single anastomosis sleeve ileal (SASI) bypass for type-2 diabetic morbid obese patients: Gastric bipartition, a novel metabolic surgery procedure: A retrospective cohort study.

T. Mahdy

Papers

Efficacy of single anastomosis sleeve ileal (SASI) bypass for type-2 diabetic morbid obese patients: Gastric bipartition, a novel metabolic surgery procedure: A retrospective cohort study.