Evidence directory

Bariatric research: study numbers and their scope

Read literal numeric sentences from original study abstracts, with publication links and attribution limits.

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These are study-level numbers. Planned enrollment, eligibility thresholds and observed numbers are labelled separately.

Study evidence

Ring-Augmented Versus Non-Ring Augmented Sleeve Gastrectomy in Patients with BMI > 50 kg/m²: 3-Year Follow-up of a Randomized Controlled Trial.

Reported outcomes · excerpt 1

Secondary outcomes included RWG, gastric pouch volumetry, relapse of associated medical problems, complications, endoscopic findings, laboratory parameters, and patient-reported outcomes (SF-36, Suter).

[1]

Publication authors: Mohamed Hany

Methods: Gastric banding · Sleeve gastrectomy

Procedure-specific outcomes of robotic versus laparoscopic Roux-en-Y gastric bypass and biliopancreatic diversion with duodenal switch across a decade of MBSAQIP adoption.

Reported outcomes · excerpt 3

For RYGB, the robotic approach was associated with higher readmission in both periods (OR 1.23 and 1.19), lower odds of serious complications (OR 0.84 and 0.87), and longer operative duration (mean differences 39.83 and 26.17 min).

[3]

Publication authors: Mohamed Hany

Methods: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass

Anatomic Reversal of Gastric Bypass as a Last Resort for Refractory Complications: A Retrospective Case Series.

Effect of standard versus long alimentary limb distal Roux-en-Y gastric bypass on weight loss and nutritional outcomes at 10 years in patients with BMI 50-60 kg/m2-a secondary analysis of a randomized clinical trial.

Study population · excerpt 7

Secondary analysis of a 10-year follow-up of an RCT with initially 113 patients (BMI 50-60 kg/m2) randomized to either standard (n = 57, 50 cm biliopancreatic/150 cm alimentary limb) or distal long alimentary limb RYGB (n = 56, 50 cm biliopancreatic/150 cm common limb) from March 2011 to April 2013 at two Norwegian hospitals.

[7]

Publication authors: Tom Mala

Methods: Roux-en-Y gastric bypass · Revisional bariatric surgery

Metabolic Outcomes and Recurrent Weight Gain 10 Years After Roux-en-Y Gastric Bypass, a Longitudinal Cohort Study.

Study population · excerpt 10

RESULTS: Among a total of 582 patients operated, 311/544 (56%) patients attended 10-year follow-up.

[10]

Study sample recorded in the source: 582 patients. Source wording: total of 582 patients

Publication authors: Tom Mala

Methods: Roux-en-Y gastric bypass

Ten-Year Outcomes Following Roux-en-Y Gastric Bypass vs Duodenal Switch for High Body Mass Index: A Randomized Clinical Trial.

Metabolic and bariatric surgery versus intensive non-surgical treatment for adolescents with severe obesity (AMOS2): a multicentre, randomised, controlled trial in Sweden.

Study eligibility · excerpt 13

500 people were assessed for eligibility between Aug 27, 2014, and June 7, 2017. 450 participants were excluded (397 did not meet inclusion criteria, 39 declined to participate, and 14 were excluded for various other reasons).

[13]

Publication authors: Torsten Olbers

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Study population · excerpt 14

Of the 50 remaining participants, 25 (19 females and six males) were randomly assigned to receive MBS and 25 (18 females and seven males) were assigned to intensive non-surgical treatment.

[14]

Publication authors: Torsten Olbers

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Very low risk of short bowel after Roux-en-Y gastric bypass – a large nationwide Swedish cohort study.

Study population · excerpt 16

Extensive small bowel resection, resulting in less than 1.5 meters of remaining small bowel, was required in 7 patients (.01%).

[16]

Publication authors: Torsten Olbers

Methods: Roux-en-Y gastric bypass

Study population · excerpt 17

All patients with extensive small bowel resection presented with abdominal pain and had confirmed internal herniation as the cause of the small bowel resection, and 2 of 7 patients died.

[17]

Publication authors: Torsten Olbers

Methods: Roux-en-Y gastric bypass

Surgical technique in constructing the jejunojejunostomy and the risk of small bowel obstruction after Roux-en-Y gastric bypass.

Reported outcomes · excerpt 19

In multivariate analysis, bidirectional stapling of the JJ was associated with a reduced 30-day risk of SBO (hazard ratio [HR] = .52, 95% confidence interval [CI] = .29-.95, P < .05), whereas limited mesenteric division (1-4 cm) increased the risk of SBO (HR = 1.66, 95% CI = 1.14-2.42, P < .01).

[19]

Publication authors: Torsten Olbers

Methods: Roux-en-Y gastric bypass

Beyond initial weight loss: procedure-specific predictors of weight recurrence after metabolic and bariatric surgery.

Study population · excerpt 20

A total of 2207 qualified patients (80% female, mean age 47.8 ± 11.9 years, mean BMI 46.0 ± 8.2 kg/m2) were followed over a median of five years (interquartile range (IQR) 4-5).

[20]

Publication authors: Omar M Ghanem

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Beyond Initial Resolution: Predictors of Recurrence of Obesity-related Medical Conditions after Metabolic and Bariatric Surgery.

Study population · excerpt 21

Among 1,323 patients with remission of at least one ORMC, ORMCR occurred in 76 (16.2%) patients with T2D, 117 (21.3%) with HTN, 71 (19.0%) with HLD, and 40 (5.4%) with OSA.

[21]

Publication authors: Omar M Ghanem

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Mapping the continuum of procedural bariatric care: real-world weight loss after endoscopic and surgical interventions.

Metabolic heterogeneity after laparoscopic sleeve gastrectomy in type 2 diabetes mellitus patients with severe obesity: insights from continuous glucose monitoring, glycemic profiles and quality of life.

Pregnancy Outcomes After Metabolic Bariatric Surgery According to the Surgery-to-Conception Interval: A Multicentre Retrospective Cohort Study (MOMBARIS 2).

Reported outcomes · excerpt 25

No statistically significant differences were observed between groups in maternal complications, mode of delivery, gestational age at birth, birthweight, or Apgar scores (all p > 0.05).

[25]

Publication authors: Piotr Major

Methods: Sleeve gastrectomy

What Really Matters in Weight Loss after Bariatric Surgery – 10 Years Follow-Up (BARI-10 -POL Study).

A Comparative Analysis of Postoperative Complications and Five-Year Metabolic Outcomes Following Metabolic and Bariatric Surgery in Patients with BMI 50-60 kg/m2 and BMI > 60 kg/m2.

Prospective evaluation of hepatic steatosis and fibrosis after one anastomosis gastric bypass using transient elastography.

Anemia Following One Anastomosis Gastric Bypass: A Comparative Study of Diabetic and Non-Diabetic Patients.

Anastomotic marginal ulceration after conversion of sleeve gastrectomy to Roux-en-Y gastric bypass.

Study population · excerpt 34

The study included 1910 patients who underwent primary RYGB and 202 patients who underwent SG-to-RYGB conversion.

[34]

Study sample recorded in the source: 1910 patients. Source wording: included 1910 patients

Publication authors: Ali Aminian

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Study population · excerpt 35

During the follow-up time of 3.8 ± 2.9 years, 275 patients with primary RYGB and 40 patients who had SG-to-RYGB conversion developed a marginal ulcer.

[35]

Study sample recorded in the source: 1910 patients. Source wording: included 1910 patients

Publication authors: Ali Aminian

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Clinical outcomes of bariatric surgery in patients with obesity and idiopathic intracranial hypertension.

Study population · excerpt 36

We retrospectively collected data from the medical record of 97 patients with obesity and an existing diagnosis of IIH who underwent primary bariatric surgery at the Cleveland Clinic health system in the USA between 2005 and 2023.

[36]

Study sample recorded in the source: 97 patients. Source wording: total of 97 patients

Publication authors: Ali Aminian

Methods: Gastric banding · Roux-en-Y gastric bypass · Sleeve gastrectomy

Study population · excerpt 37

A total of 97 patients (98% female, median age 46.7 years, median BMI 48.3 kg/m2) with IIH who underwent bariatric surgery including Roux-en-Y gastric bypass (n = 66, 68%), sleeve gastrectomy (n = 27, 27.8%), and gastric banding (n = 4, 4.1%) were analyzed.

[37]

Study sample recorded in the source: 97 patients. Source wording: total of 97 patients

Publication authors: Ali Aminian

Methods: Gastric banding · Roux-en-Y gastric bypass · Sleeve gastrectomy

Association between geospatial disparities in food security with weight loss and nutritional outcomes of metabolic surgery.

Study population · excerpt 38

A total of 5097 patients were included in this study cohort, including 3424 patients who underwent RYGB and 1673 who underwent SG.

[38]

Study sample recorded in the source: 5097 patients. Source wording: total of 5097 patients

Publication authors: Ali Aminian

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Truncal Vagotomy and Gastrojejunostomy Revision for Treatment of Marginal Ulcer.

Validation of the Michigan Bariatric Surgery Collaborative outcomes calculator in a Hispanic population.

Study population · excerpt 40

One hundred seventy-seven patients underwent sleeve gastrectomy (SG), and 99 patients underwent Roux-en-Y gastric bypass (RYGB) as their initial bariatric operation.

[40]

Study sample recorded in the source: 99 patients. Source wording: 99 patients underwent

Publication authors: Benjamin Clapp

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Cost drivers of gastric sleeve procedures performed using robotic platform.

Reported outcomes · excerpt 42

Increased costs were driven by type of stapler, patients aged 55-64, male, non-White race, non-Medicare insurance, higher comorbidity, and disease severity, and hospitals in West region, rural, more than 500 beds, with the lower hospital and surgeon’s volume.

[42]

Publication authors: Benjamin Clapp

Methods: Robotic sleeve gastrectomy · Sleeve gastrectomy

Sleeve Gastrectomy to Roux-en-Y Gastric Bypass Conversion Versus Primary Roux-en-Y Gastric Bypass: Impact of Robotic Platform on Propensity-Matched Outcomes.

Study population · excerpt 43

This retrospective study included 378 patients after 2:1 propensity score matching based on demographic and clinical characteristics, comparing primary Roux-en-Y gastric bypass (P-RYGB) with sleeve gastrectomy-to-Roux-en-Y gastric bypass (SG-RYGB).

[43]

Study sample recorded in the source: 378 patients. Source wording: included 378 patients

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy

Reported outcomes · excerpt 45

In the full cohort (n = 378), SG-RYGB was associated with longer operative time, greater blood loss (P < .001), longer hospital stay (P = .04), and higher late complication rates (P = .04).

[45]

Study sample recorded in the source: 378 patients. Source wording: included 378 patients

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy

Reported outcomes · excerpt 46

In the robotic-only matched analysis (n = 297), differences in operative time and blood loss were no longer significant, and early and late outcomes were comparable, although length of stay still remained longer for SG-RYGB (P = .05).

[46]

Study sample recorded in the source: 378 patients. Source wording: included 378 patients

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy

Clinical outcomes in solid organ transplant recipients undergoing Roux-en-Y gastric bypass surgery: a propensity score-matched study.

Study population · excerpt 47

A retrospective review of a prospectively maintained database identified 566 patients who underwent primary robotic RYGB between January 2014 and December 2024.

[47]

Study sample recorded in the source: 68 patients. Source wording: 68 patients were included

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass

Study population · excerpt 48

Seventeen solid organ transplant recipients receiving chronic immunosuppressive therapy were identified and matched 3:1 to nontransplant patients using propensity scores based on age, body mass index, and obesity-related co-morbidities.

[48]

Study sample recorded in the source: 68 patients. Source wording: 68 patients were included

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass

Reported outcomes · excerpt 50

Early postoperative outcomes did not differ significantly, including complications (41.2% versus 27.5%, P = .29), readmissions (35.3% versus 25.5%, P = .44), and reinterventions (.0% versus 7.8%, P = .23).

[50]

Study sample recorded in the source: 68 patients. Source wording: 68 patients were included

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass

Reported outcomes · excerpt 51

Kaplan-Meier analysis demonstrated lower freedom from late complications (log rank P = .006), lower freedom from late reoperation (log rank P = .010), and lower overall survival (log rank P = .029).

[51]

Study sample recorded in the source: 68 patients. Source wording: 68 patients were included

Publication authors: Enrique F Elli

Methods: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass

Robotic versus laparoscopic one anastomosis gastric bypass (OAGB): a propensity score-matched comparative study of perioperative outcomes in 200 patients.

Study population · excerpt 52

A retrospective analysis was conducted on 241 patients who underwent primary OAGB at the Bariatric and Endocrine-Metabolic Surgery Unit, University of Naples “Federico II,” between January 2023 and December 2025.

[52]

Study sample recorded in the source: 100 patients. Source wording: 100 patients underwent

Publication authors: Mario Musella

Methods: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Robotic mini gastric bypass · Robotic Roux-en-Y gastric bypass

Propensity score matched analysis of postoperative nausea and pain after one anastomosis gastric bypass (MGB/OAGB) versus sleeve gastrectomy (SG).

Timing of Bariatric Surgery and COVID-19 Vaccination: Experience From a High-volume Single Center.

Study population · excerpt 55

A total of 108 patients were included: 33 (30.6%) of whom were in Group±30 and 74(69.4%) in Group>30.

[55]

Study sample recorded in the source: 108 patients. Source wording: total of 108 patients

Publication authors: Mario Musella

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Reported outcomes · excerpt 56

Findings revealed that postoperative outcomes (ie, 30-d complications and length of stay postoperatively) were comparable between groups.

[56]

Study sample recorded in the source: 108 patients. Source wording: total of 108 patients

Publication authors: Mario Musella

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Reported outcomes · excerpt 57

COVID-19 vaccination within 30 days of MBS does not impact complication rates and length of stay.

[57]

Study sample recorded in the source: 108 patients. Source wording: total of 108 patients

Publication authors: Mario Musella

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Early Termination of a First-in-Human Trial of a Swallowable Self-Expanding Intragastric Balloon (IGBalloon©) Due to Small Bowel Obstruction.

Planned enrollment · excerpt 58

This prospective open-label, non-randomized trial was designed to include 20 patients with obesity.

[58]

Publication authors: Gerhard Prager

Methods: Gastric balloon

Study eligibility · excerpt 59

Patients with a body mass index (BMI) >35 kg/m² or >30 kg/m² with at least one obesity-related complication were eligible.

[59]

Publication authors: Gerhard Prager

Methods: Gastric balloon

Changes in bone metabolism and densitometry after metabolic/bariatric surgery: a comparison of pre- and postoperative results in a prospective long-term study.

Update on esophageal function, acid and non-acid reflux after one-anastomosis gastric bypass (OAGB): high-resolution manometry, impedance-24-h pH-metry, and gastroscopy in a prospective mid-term study.

Study population · excerpt 61

A total of 50 patients were included in this study and went through all examinations.

[61]

Study sample recorded in the source: 50 patients. Source wording: total of 50 patients

Publication authors: Gerhard Prager

Methods: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass

Study context and its limits

Study sample reported in this source record: 50.

Reported recruitment period / follow-up: Operations before 31st December 2022; mean follow-up 4.1 years

Recorded author position: last.

Mean weight and BMI after the end of the follow-up period of 4.1 ± 2.9 years were 79.0 ± 13.1 kg and 28.7 ± 5.7, with a TWL of 37.1 ± 8.1%.

Source for this statement

denominator

A total of 50 patients were included in this study and went through all examinations.

Supporting source

period

This study includes primary OAGB patients operated at the Medical University of Vienna before 31st December 2022.

Supporting source

authorship; last listed author

Felsenreich D M 1 ✉ # Vock N 1 # Zach M L 1 Kristo I 1 Jedamzik J 1 Bichler C 1 Eichelter J 1 Mairinger M 1 Gensthaler L 1 Nixdorf L 1 Richwien P 1 Pedarnig L 1 Langer F B 1 Prager G 1

Supporting source

selection limit

Patients with metabolic/bariatric procedures before the OAGB, postoperative complications, and reoperations were not included in this study as this could compromise the quality of data gathered.

Supporting source

Study context and its limits

Study sample reported in this source record: 50.

Reported recruitment period / follow-up: Operations before 31st December 2022; mean follow-up 4.1 years

Recorded author position: last.

The esophagitis rate was 12.0% (six patients) macroscopic and 34.0% (17 patients) microscopic (biopsies).

Interestingly, Barrett’s esophagus was detected in three patients (6.0%) who did not have it preoperatively.

Source for this statement

denominator

A total of 50 patients were included in this study and went through all examinations.

Supporting source

period

This study includes primary OAGB patients operated at the Medical University of Vienna before 31st December 2022.

Supporting source

authorship; last listed author

Felsenreich D M 1 ✉ # Vock N 1 # Zach M L 1 Kristo I 1 Jedamzik J 1 Bichler C 1 Eichelter J 1 Mairinger M 1 Gensthaler L 1 Nixdorf L 1 Richwien P 1 Pedarnig L 1 Langer F B 1 Prager G 1

Supporting source

selection limit

Patients with metabolic/bariatric procedures before the OAGB, postoperative complications, and reoperations were not included in this study as this could compromise the quality of data gathered.

Supporting source

follow-up

The mean follow-up in this study was 4.1 ± 2.9 years, with a minimal follow-up of 1 year.

Supporting source

asymptomatic findings

Gastroscopy showed significant signs of chronic reflux exposure of the anastomosis, the pouch, and the distal esophagus, even in asymptomatic patients.

Supporting source

Weight loss dynamics after laparoscopic sleeve gastrectomy: a retrospective single center analysis with age and preoperative weight stratification.

Study population · excerpt 62

We investigated the effects of preoperative weight, height, and age on total weight loss percentage (%TWL) following LSG using advanced statistical modeling. 2014 LSG patients were analyzed and stratified by preoperative weight (7 categories: <90 kg to > 160 kg) and age (5 groups: 14-25 to ≥ 56 years). %TWL was calculated at 1 week, 1, 3, 6, and 12 months post-surgery.

[62]

Study sample recorded in the source: 2014 patients. Source wording: 2014 LSG patients were analyzed

Publication authors: Halil Alis

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 2014.

Reported recruitment period / follow-up: 2013–2023; follow-up 12 months

Recorded author position: last.

Figure 3 illustrates the relationship between preoperative weight and %TWL at 12 months post-surgery.

The data reveals a clear trend of increasing weight loss percentage as the preoperative weight increases.

Analysis of 2014 patients demonstrated a positive correlation between preoperative weight and %TWL at 12 months post-surgery.

Patients with preoperative weight < 90 kg achieved the lowest %TWL (32.2% ± 10.0, with significantly lower outcomes compared to all other groups ( p < 0.01 to p < 0.001).

Those > 160 kg experienced the highest %TWL (39.8% ± 7.5).

These findings suggest that preoperative weight significantly influences post-surgical weight loss outcomes, with higher pre-op weights associated with greater %TWL at 12 months.

Source for this statement

denominator and period

This retrospective single-center study included a total of 2014 patients who underwent LSG between May 2013 – November 2023 at the Istanbul Aydin University Obesity Surgery Center, Istanbul, Turkey.

Supporting source

last authorship

Kankaya Burak 1 Buyukasik Suleyman 1 Altundal Yusuf Emre 1 3 ✉ Ozgul Mustafa 2 Etemad Ayden 1 Rahmanbakhsh Paria 1 Guzelaltuncekic Esra 1 Alis Halil 1

Supporting source

limit

As a retrospective single-center study, our findings may be subject to selection bias and confounding factors not accounted for in the analysis.

Supporting source

complication discussion is cited external evidence, not cohort risk

While our study focused primarily on weight loss outcomes, it’s important to acknowledge that postoperative complications, particularly staple line leaks, remain a significant concern in sleeve gastrectomy.

Recent evidence demonstrates leak rates ranging from 2.2 to 6.46%, representing the second leading cause of mortality after MBS 26 .

Several risk factors have been identified, including smoking, diabetes mellitus, and sleep apnea.

Current evidence supports a multimodal approach to leak management, with studies showing success rates of up to 73% with percutaneous drainage and 53.8% with endoscopic stenting, while early detection through measures such as drain amylase monitoring has shown promise in improving outcomes 15 .

While intraluminal endoscopic stenting is utilized for managing staple line leaks at our institution, we identify the need for future prospective studies examining our institutional outcomes regarding leak management strategies.

This represents an important future direction, as comprehensive understanding of both weight loss dynamics and complication management is crucial for optimizing patient outcomes in MBS.

Supporting source

Association Between Pre-Operative Fat Mass and Appendicular Lean Soft-Tissue Mass Before and One Year After Laparoscopic Sleeve Gastrectomy: A Sex-Stratified Body Composition Study.

Study population · excerpt 63

Methods: This retrospective single-center study included 121 adult patients (84 female, 37 male) who underwent LSG at Istanbul Aydin University Faculty of Medicine between May 2017 and February 2025.

[63]

Study sample recorded in the source: 121 patients. Source wording: included 121 adult patients

Publication authors: Halil Alis

Methods: Sleeve gastrectomy

Study population · excerpt 64

Conclusions: Body composition changes following laparoscopic sleeve gastrectomy in this cohort of 121 patients were metric-dependent.

[64]

Study sample recorded in the source: 121 patients. Source wording: included 121 adult patients

Publication authors: Halil Alis

Methods: Sleeve gastrectomy

Laparoscopic versus ultrasound-guided subcostal transversus abdominis plane block in sleeve gastrectomy: A randomised comparison of analgesic effectiveness and procedural feasibility.

Study population · excerpt 65

This prospective, randomised trial included 50 patients undergoing LSG, assigned to either L-subcostal TAP or USG-subcostal TAP groups.

[65]

Study sample recorded in the source: 50 patients. Source wording: included 50 patients

Publication authors: Halil Alis

Methods: Sleeve gastrectomy

Efficacy of Omentopexy on Complications of Laparoscopic Sleeve Gastrectomy.

Study population · excerpt 66

A total of 1356 patients were included in the study (540 in omentopexy, 816 in control), of which the mean age was 37.9 ± 10.5 years, 82.3% were women, and mean BMI was 40.9 ± 5.8 kg/m2.

[66]

Study sample recorded in the source: 1356 patients. Source wording: total of 1356 patients

Publication authors: Samet Yardimci

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 1356.

Reported recruitment period / follow-up: 2020–2023

Recorded author position: last.

The study included 1356 patients with a mean age of 37.9 ± 10.5 years and a mean BMI value of 40.9 ± 5.8 kg/m 2 , of whom 82.3% were women.

Among these patients, the bleeding rate was 1.0%, the leakage rate was 0.2%, the trocar site hernia rate was 0.2%, and the reoperation rate was 0.6%.

Source for this statement

period

All patients who underwent LSG between 2020 and 2023 were examined.

Supporting source

last authorship

Kara Yalcin Burak 1 ✉ Ozel Yahya 2 Yardimci Samet 3

Supporting source

denominator and exclusions

A total of 1374 patients who underwent LSG were examined.

Three patients were excluded due to a history of upper abdominal open surgery (open cholecystectomy), and 15 patients were excluded due to revisional sleeve surgery (one re-sleeving gastrectomy and 14 gastric band removals or revisional sleeve gastrectomies).

After exclusion, 1356 patients were approved for inclusion and, according to whether they underwent omentopexy or not, they were assigned to one of two groups: the control group (traditional LSG) and the omentopexy group (Fig.

1 ).

Supporting source

limit

Despite the study’s large sample size and the use of a control group, it was designed as a single-center retrospective analysis.

Supporting source

comparison result

Omentopexy has no additional benefit on early complications when using staple-line imbrication.

Supporting source

study affiliation

General Surgery Department, Istinye University VM Medical Park Pendik Hospital

Supporting source

Reported outcomes · excerpt 67

The mean bleeding rate was 1.0% (1.3-0.7%), the mean leakage rate was 0.2% (0.2-0.2%, respectively), and the mean reoperation rate was 0.6% (0.7% and 0.5%, respectively).

[67]

Study sample recorded in the source: 1356 patients. Source wording: total of 1356 patients

Publication authors: Samet Yardimci

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 1356.

Reported recruitment period / follow-up: 2020–2023

Recorded author position: last.

The study included 1356 patients with a mean age of 37.9 ± 10.5 years and a mean BMI value of 40.9 ± 5.8 kg/m 2 , of whom 82.3% were women.

Among these patients, the bleeding rate was 1.0%, the leakage rate was 0.2%, the trocar site hernia rate was 0.2%, and the reoperation rate was 0.6%.

Source for this statement

period

All patients who underwent LSG between 2020 and 2023 were examined.

Supporting source

last authorship

Kara Yalcin Burak 1 ✉ Ozel Yahya 2 Yardimci Samet 3

Supporting source

denominator and exclusions

A total of 1374 patients who underwent LSG were examined.

Three patients were excluded due to a history of upper abdominal open surgery (open cholecystectomy), and 15 patients were excluded due to revisional sleeve surgery (one re-sleeving gastrectomy and 14 gastric band removals or revisional sleeve gastrectomies).

After exclusion, 1356 patients were approved for inclusion and, according to whether they underwent omentopexy or not, they were assigned to one of two groups: the control group (traditional LSG) and the omentopexy group (Fig.

1 ).

Supporting source

limit

Despite the study’s large sample size and the use of a control group, it was designed as a single-center retrospective analysis.

Supporting source

comparison result

Omentopexy has no additional benefit on early complications when using staple-line imbrication.

Supporting source

study affiliation

General Surgery Department, Istinye University VM Medical Park Pendik Hospital

Supporting source

A Simple Way to Estimate a Difficult Sleeve Gastrectomy Prior to Operating.

Study population · excerpt 68

In all, 151 patients were included in the study; of these, 124 (82.1%) were women and 27 (17.9%) were men.

[68]

Study sample recorded in the source: 151 patients. Source wording: In all, 151 patients

Publication authors: Samet Yardimci

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 151.

Reported recruitment period / follow-up: May–October 2022

Recorded author position: last.

There was no leakage of laparoscopic sleeve gastrectomy (0/151).

The bleeding rate after surgery was 0.013 (2/151).

One of these two patients did not need any surgical intervention, as a blood transfusion alone stopped the bleeding.

The other patient underwent a diagnostic laparoscopy, but no active bleeding was observed; the abdomen was cleaned and drainage was initiated.

No trocar site hernia was observed.

There were no instances of 30-day mortality or readmission.

Source for this statement

period

Laparoscopic sleeve gastrectomy patients seen between May and October 2022 were included in the analysis

Supporting source

last authorship

Supporting source

difficulty

According to the expert’s opinion, 123 cases were easy, 22 cases were intermediate, and 6 were difficult.

Supporting source

operator not named in this sentence

All operations were performed by the same surgeon and surgical team.

Supporting source

study affiliation

General Surgery Department, Istinye University VM Medical Park Pendik Hospital

Supporting source

Is All Weight Loss Equal Following Sleeve Gastrectomy? Defining Body Composition and Anthropometric Thresholds for Hyperglycemia Remission in Women from a Prospective Cohort Study.

Incidence and Indications for Revisional Metabolic Bariatric Surgery: A 10-Year Analysis from the Australian and New Zealand Registry.

Effects of bariatric surgery on renal function: a retrospective cohort study comparing one-year outcomes between one-anastomosis gastric bypass and Roux-en-Y gastric bypass.

WEIGHT LOSS AND QUALITY OF LIFE AFTER ONE ANASTOMOSIS GASTRIC BYPASS: A 2-YEAR FOLLOW-UP STUDY.

Changes in the Bone Mineral Density after Sleeve Gastrectomy vs. Roux-En-Y Gastric Bypass 2 Years after Surgery.

Study population · excerpt 75

In total, 650 patients were included in the study, and 523 patients (80.5%) underwent RYGB and 127 (19.5%) SG.

[75]

Study sample recorded in the source: 650 patients. Source wording: 650 patients were included

Publication authors: Jaime Ruiz-Tovar

Methods: Roux-en-Y gastric bypass · Sleeve gastrectomy

Improvement of Metabolic-Associated Fatty Liver Disease by Magnetic Resonance Spectroscopy in Morbidly Obese Women Undergoing Roux-en-Y Gastric Bypass, following a Postoperative Mediterranean-like Diet.

Study population · excerpt 76

This study aimed to assess the improvement of MAFLD, specifically liver steatosis, in morbidly obese patients undergoing Roux-en-Y gastric bypass (RYGB) and following a hypocaloric Mediterranean-like diet. (2) Methods: A prospective observational pilot study of 20 patients undergoing RYGB was conducted.

[76]

Study sample recorded in the source: 12 patients. Source wording: total of 12 patients

Publication authors: Jaime Ruiz-Tovar

Methods: Roux-en-Y gastric bypass

Study population · excerpt 77

A total of 12 patients (60%) were within the range of moderate adherence to the Mediterranean diet, whereas 8 patients (40%) showed a high adherence.

[77]

Study sample recorded in the source: 12 patients. Source wording: total of 12 patients

Publication authors: Jaime Ruiz-Tovar

Methods: Roux-en-Y gastric bypass

Management of Recurrent Weight Gain After Sleeve Gastrectomy: Comparative Effectiveness of Conversion Procedures Versus Obesity Management Medications.

National Trends and Outcomes of Metabolic and Bariatric Surgery in Adolescents: Insights from the Israeli National Bariatric Surgery Registry.

Long-Term Outcomes of One-Anastomosis Gastric Bypass in Class IV and Class V Obesity: A Comparative Analysis with Sleeve Gastrectomy.

Long-Term Anatomical Durability and Clinical Outcomes of Concomitant Laparoscopic Sleeve Gastrectomy and Hiatal Hernia Repair: Up to 10-Year Multicenter Analysis.

Reported outcomes · excerpt 83

Although concomitant hiatal hernia repair during laparoscopic sleeve gastrectomy has been widely adopted, long-term data beyond 5 years remain limited, and the clinical relevance of anatomical recurrence is still poorly defined.

[83]

Publication authors: Gianfranco Silecchia

Methods: Sleeve gastrectomy

Reported outcomes · excerpt 84

To evaluate the 10-year recurrence rate, predictors of failure, and clinical outcomes following concomitant sleeve gastrectomy and hiatal hernia repair.

[84]

Publication authors: Gianfranco Silecchia

Methods: Sleeve gastrectomy

Study population · excerpt 85

This retrospective multicenter cohort study analyzed 111 patients who underwent sleeve gastrectomy with concomitant hiatal hernia repair between 2014 and 2015.

[85]

Publication authors: Gianfranco Silecchia

Methods: Sleeve gastrectomy

Reported outcomes · excerpt 89

Freedom from recurrence was 98.1% at 5 years and 68.9% at 10 years, although the 10-year estimate should be interpreted cautiously.

[89]

Publication authors: Gianfranco Silecchia

Methods: Sleeve gastrectomy

Reported outcomes · excerpt 90

Hernia size ≥ 5 cm and postoperative GERD were associated with recurrence (OR 5.0; 95% CI 1.2-20.0; P=0.035; OR 4.97; 95% CI 1.56-17.53; p = 0.008).

[90]

Publication authors: Gianfranco Silecchia

Methods: Sleeve gastrectomy

Short-term gut microbiota’s shift after laparoscopic Roux-en-Y vs one anastomosis gastric bypass: results of a multicenter randomized control trial.

Readmission and reoperation rates after laparoscopic bariatric surgery in an Italian center of excellence.

Reported outcomes · excerpt 93

The secondary endpoint involved assessing the causes of readmission within 30 days of discharge, the rates, and types of reoperations and/or additional procedures related to the first surgery, and the outcomes of readmitted patients.

[93]

Publication authors: Gianfranco Silecchia

Methods: Revisional bariatric surgery

Laparoscopic Revision of Sleeve Gastrectomy with Only Hiatal Hernia Repair for Gastroesophageal Reflux Disease: A Retrospective Study.

Study population · excerpt 100

All patients were taking a daily proton pump inhibitor prior to the revision; only 40% were able to discontinue it after the procedure. 112 patients (46.6%) with a hiatal hernia, normotonic or slightly hypotonic lower esophageal sphincter (LES) were satisfied with the intervention; 72 (30%) had a neutral attitude, and 56 patients with a hypotonic LES (21.4%) reported unchanged symptoms.

[100]

Publication authors: Stefano Olmi

Methods: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy

Concomitant hiatal hernia repair during laparoscopic sleeve gastrectomy and 5-year endoscopic esophagitis: a retrospective cohort study of 400 patients.

Study population · excerpt 101

This single-center retrospective cohort study, reported in accordance with STROBE, included 400 consecutive patients who underwent primary LSG in 2019.

[101]

Publication authors: Stefano Olmi

Methods: Sleeve gastrectomy

Study population · excerpt 103

HH was identified in 115/400 patients (28.8%) and repaired in 75 (65.2%).

[103]

Publication authors: Stefano Olmi

Methods: Sleeve gastrectomy

Study population · excerpt 104

At 5 years, esophagitis was present in 36/356 patients (10.1%): 27 had LA-A and 9 LA-B esophagitis, with no LA-C or LA-D cases.

[104]

Publication authors: Stefano Olmi

Methods: Sleeve gastrectomy

Study population · excerpt 105

Barrett’s esophagus was identified in 4/356 patients (1.1%), and 88/356 (24.7%) were receiving proton-pump inhibitor therapy.

[105]

Publication authors: Stefano Olmi

Methods: Sleeve gastrectomy

Study population · excerpt 106

Esophagitis occurred in 4/75 patients with repaired HH (5.3%), 9/40 with unrepaired HH (22.5%), and 23/241 without HH (9.5%) (overall p=0.013).

[106]

Publication authors: Stefano Olmi

Methods: Sleeve gastrectomy

Gastroesophageal and bile reflux after one-anastomosis gastric bypass: long-term outcomes in a functionally evaluated cohort.

Endoscopic versus surgical management of recurrent weight gain following sleeve gastrectomy.

The Effects of Laparoscopic Sleeve Gastrectomy on Glucose Metabolism in Patients with a Body Mass Index below 35 kg/m².

Study population · excerpt 116

In this study, the files of 174 patients who had laparoscopic sleeve gastrectomy with a body mass index between 30-35kg/m2 between March 2013 and September 2019 were analyzed retrospectively.

[116]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 174.

Reported recruitment period / follow-up: March 2013–September 2019

Recorded author position: first.

Compared with preoperative mean fasting plasma glucose value (FBG (105.40±31.42 mg/dL) postoperatively mean FBG values regressed to 92.40±26.36 mg/dL at the 3 rd , to 90.37±11.33 mg/dL at the 6 th and 92.96±17.69 mg/dL at the 12 th months with a statistically significant difference between preoperative, and postoperative values (p<0.0001).

Source for this statement

denominator, population and recruitment period

In this study, the files of 174 patients who had laparoscopic sleeve gastrectomy with a body mass index between 30-35kg/m2 between March 2013 and September 2019 were analyzed retrospectively.

Patients were evaluated by a multidisciplinary team in the preoperative period.

Patients who met the criteria for laparoscopic sleeve gastrectomy were operated according to American Metabolic and Bariatric Surgeons criteria.

Demographic data, body mass index, insulin, glycosylated hemoglobin (HbA1c), glucose, homeostasis model insulin resistance (HOMA-IR) values were recorded.

The patients were followed up with visits to the outpatient clinic scheduled for 1-3-6 and 12 months postoperatively.

Supporting source

mortality and cohort

Between March 2013 and September 2019, 174 patients with BMIs 30-35 kg/m 2 underwent LSG.

Patients undergoing other bariatric surgeries and revision surgery were not included in this study.

The mean age of the patients was 39.57±9.40 and 149 patients (85.6%) were women.

The mean BMI was 32.70±2.65 kg/m 2 .

Demographic data and preoperative biochemical parameters are summarized in Table 1 .

All cases were completed laparoscopically without reversal.

The mean hospital stay was 3.1±0.7 days.

Any early or late mortality was not detected.

Supporting source

first author

Batman B, Altun H.

Supporting source

historical affiliation

1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey

Supporting source

Limits of interpretation

Retrospective selected lower-BMI cohort; no control group.

No detailed complication counts in the full text.

Not an individual diabetes remission probability.

Possible overlap with other Batman cohorts; do not sum.

Study population · excerpt 117

The mean age of the 174 patients who underwent laparoscopic sleeve gastrectomy was 39.57±9.40, and the mean body mass index was 32.70±2.65. 149 patients (85.6%) were female.

[117]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 174.

Reported recruitment period / follow-up: March 2013–September 2019

Recorded author position: first.

Compared with preoperative mean fasting plasma glucose value (FBG (105.40±31.42 mg/dL) postoperatively mean FBG values regressed to 92.40±26.36 mg/dL at the 3 rd , to 90.37±11.33 mg/dL at the 6 th and 92.96±17.69 mg/dL at the 12 th months with a statistically significant difference between preoperative, and postoperative values (p<0.0001).

Source for this statement

denominator, population and recruitment period

In this study, the files of 174 patients who had laparoscopic sleeve gastrectomy with a body mass index between 30-35kg/m2 between March 2013 and September 2019 were analyzed retrospectively.

Patients were evaluated by a multidisciplinary team in the preoperative period.

Patients who met the criteria for laparoscopic sleeve gastrectomy were operated according to American Metabolic and Bariatric Surgeons criteria.

Demographic data, body mass index, insulin, glycosylated hemoglobin (HbA1c), glucose, homeostasis model insulin resistance (HOMA-IR) values were recorded.

The patients were followed up with visits to the outpatient clinic scheduled for 1-3-6 and 12 months postoperatively.

Supporting source

mortality and cohort

Between March 2013 and September 2019, 174 patients with BMIs 30-35 kg/m 2 underwent LSG.

Patients undergoing other bariatric surgeries and revision surgery were not included in this study.

The mean age of the patients was 39.57±9.40 and 149 patients (85.6%) were women.

The mean BMI was 32.70±2.65 kg/m 2 .

Demographic data and preoperative biochemical parameters are summarized in Table 1 .

All cases were completed laparoscopically without reversal.

The mean hospital stay was 3.1±0.7 days.

Any early or late mortality was not detected.

Supporting source

first author

Batman B, Altun H.

Supporting source

historical affiliation

1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey

Supporting source

Limits of interpretation

Retrospective selected lower-BMI cohort; no control group.

No detailed complication counts in the full text.

Not an individual diabetes remission probability.

Possible overlap with other Batman cohorts; do not sum.

Reported outcomes · excerpt 118

The mean hospital stay was 3.1±0.7 days.

[118]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 174.

Reported recruitment period / follow-up: March 2013–September 2019

Recorded author position: first.

Compared with preoperative mean fasting plasma glucose value (FBG (105.40±31.42 mg/dL) postoperatively mean FBG values regressed to 92.40±26.36 mg/dL at the 3 rd , to 90.37±11.33 mg/dL at the 6 th and 92.96±17.69 mg/dL at the 12 th months with a statistically significant difference between preoperative, and postoperative values (p<0.0001).

Source for this statement

denominator, population and recruitment period

In this study, the files of 174 patients who had laparoscopic sleeve gastrectomy with a body mass index between 30-35kg/m2 between March 2013 and September 2019 were analyzed retrospectively.

Patients were evaluated by a multidisciplinary team in the preoperative period.

Patients who met the criteria for laparoscopic sleeve gastrectomy were operated according to American Metabolic and Bariatric Surgeons criteria.

Demographic data, body mass index, insulin, glycosylated hemoglobin (HbA1c), glucose, homeostasis model insulin resistance (HOMA-IR) values were recorded.

The patients were followed up with visits to the outpatient clinic scheduled for 1-3-6 and 12 months postoperatively.

Supporting source

mortality and cohort

Between March 2013 and September 2019, 174 patients with BMIs 30-35 kg/m 2 underwent LSG.

Patients undergoing other bariatric surgeries and revision surgery were not included in this study.

The mean age of the patients was 39.57±9.40 and 149 patients (85.6%) were women.

The mean BMI was 32.70±2.65 kg/m 2 .

Demographic data and preoperative biochemical parameters are summarized in Table 1 .

All cases were completed laparoscopically without reversal.

The mean hospital stay was 3.1±0.7 days.

Any early or late mortality was not detected.

Supporting source

first author

Batman B, Altun H.

Supporting source

historical affiliation

1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey

Supporting source

Limits of interpretation

Retrospective selected lower-BMI cohort; no control group.

No detailed complication counts in the full text.

Not an individual diabetes remission probability.

Possible overlap with other Batman cohorts; do not sum.

Benefits of Suture Reinforcement in Laparoscopic Sleeve Gastrectomy.

Study population · excerpt 119

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

[119]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 1200.

Reported recruitment period / follow-up: March 2013–December 2018

Recorded author position: first.

Obesity is an increasing problem worldwide.

Laparoscopic sleeve gastrectomy is gaining popularity.

Although it has unique complications such as leakage, bleeding, and stenosis, it is a reliable procedure.

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Body mass index, age, sex, and postoperative complications were recorded in all patients.

Of 1200 patients, 864 (72%) were female and 336 (28%) were male.

The median age was 38 years (13 to 69 y).

Preoperative median body mass index was found as 40.87 kg/m (30 to 88 kg/m).

Operative complications included strictures which occurred in 16 (1.33%) patients, bleeding in 7 (0.58%), stapler line leaks in 3 (0.25%), wound infection in 1 (0.08%), fat necrosis in 1 (0.08%), splenic arterial injury in 1 (0.08%), and intra-abdominal abscess in 1 (0.08%) patient.

There was no mortality.

Sleeve gastrectomy and omentopexy is a safe procedure with low complication rates.

Source for this statement

first author

Batman B, Altun H.

Supporting source

identity bridge

10.

Batman B, Altun H.

Benefits of Suture Reinforcement in Laparoscopic Sleeve Gastrectomy.

Surg Laparosc Endosc Percutan Tech.

2019 Sep 11. doi: 10.1097/SLE.0000000000000722. [Epub ahead of print] PMID: 31517747

Supporting source

denominator and period

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Supporting source

Limits of interpretation

Historical study-team cohort, not a personal operator audit or current Hisar outcome rate.

Abstract does not specify duration of complication surveillance.

Study population · excerpt 120

Of 1200 patients, 864 (72%) were female and 336 (28%) were male.

[120]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 1200.

Reported recruitment period / follow-up: March 2013–December 2018

Recorded author position: first.

Obesity is an increasing problem worldwide.

Laparoscopic sleeve gastrectomy is gaining popularity.

Although it has unique complications such as leakage, bleeding, and stenosis, it is a reliable procedure.

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Body mass index, age, sex, and postoperative complications were recorded in all patients.

Of 1200 patients, 864 (72%) were female and 336 (28%) were male.

The median age was 38 years (13 to 69 y).

Preoperative median body mass index was found as 40.87 kg/m (30 to 88 kg/m).

Operative complications included strictures which occurred in 16 (1.33%) patients, bleeding in 7 (0.58%), stapler line leaks in 3 (0.25%), wound infection in 1 (0.08%), fat necrosis in 1 (0.08%), splenic arterial injury in 1 (0.08%), and intra-abdominal abscess in 1 (0.08%) patient.

There was no mortality.

Sleeve gastrectomy and omentopexy is a safe procedure with low complication rates.

Source for this statement

first author

Batman B, Altun H.

Supporting source

identity bridge

10.

Batman B, Altun H.

Benefits of Suture Reinforcement in Laparoscopic Sleeve Gastrectomy.

Surg Laparosc Endosc Percutan Tech.

2019 Sep 11. doi: 10.1097/SLE.0000000000000722. [Epub ahead of print] PMID: 31517747

Supporting source

denominator and period

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Supporting source

Limits of interpretation

Historical study-team cohort, not a personal operator audit or current Hisar outcome rate.

Abstract does not specify duration of complication surveillance.

Reported outcomes · excerpt 121

Operative complications included strictures which occurred in 16 (1.33%) patients, bleeding in 7 (0.58%), stapler line leaks in 3 (0.25%), wound infection in 1 (0.08%), fat necrosis in 1 (0.08%), splenic arterial injury in 1 (0.08%), and intra-abdominal abscess in 1 (0.08%) patient.

[121]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 1200.

Reported recruitment period / follow-up: March 2013–December 2018

Recorded author position: first.

Obesity is an increasing problem worldwide.

Laparoscopic sleeve gastrectomy is gaining popularity.

Although it has unique complications such as leakage, bleeding, and stenosis, it is a reliable procedure.

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Body mass index, age, sex, and postoperative complications were recorded in all patients.

Of 1200 patients, 864 (72%) were female and 336 (28%) were male.

The median age was 38 years (13 to 69 y).

Preoperative median body mass index was found as 40.87 kg/m (30 to 88 kg/m).

Operative complications included strictures which occurred in 16 (1.33%) patients, bleeding in 7 (0.58%), stapler line leaks in 3 (0.25%), wound infection in 1 (0.08%), fat necrosis in 1 (0.08%), splenic arterial injury in 1 (0.08%), and intra-abdominal abscess in 1 (0.08%) patient.

There was no mortality.

Sleeve gastrectomy and omentopexy is a safe procedure with low complication rates.

Source for this statement

first author

Batman B, Altun H.

Supporting source

identity bridge

10.

Batman B, Altun H.

Benefits of Suture Reinforcement in Laparoscopic Sleeve Gastrectomy.

Surg Laparosc Endosc Percutan Tech.

2019 Sep 11. doi: 10.1097/SLE.0000000000000722. [Epub ahead of print] PMID: 31517747

Supporting source

denominator and period

A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.

Supporting source

Limits of interpretation

Historical study-team cohort, not a personal operator audit or current Hisar outcome rate.

Abstract does not specify duration of complication surveillance.

The Effect of Laparoscopic Sleeve Gastrectomy on Nonalcoholic Fatty Liver Disease.

Study population · excerpt 122

Of the 120 consecutive patients screened, 72 were enrolled in this study.

[122]

Publication authors: Burcin Batman

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: 72.

Recorded author position: first.

Obesity is associated with nonalcoholic fatty liver disease which is one of the most common causes of chronic liver disease.

FibroScan is a noninvasive tool for liver stiffness measurement and controlled attenuation parameter to evaluate liver steatosis and fibrosis.

We aimed to demonstrate the effect of laparoscopic sleeve gastrectomy on liver steatosis and fibrosis.

Of the 120 consecutive patients screened, 72 were enrolled in this study.

FibroScan M probe and XL probe were used for the evaluation of liver steatosis and fibrosis.

Fifty-two patients (72.2%) were female individuals and 20 (27.8%) were male individuals; the mean age was 37.9±10.4 years.

Percentage of excess weight loss was significant at the third and sixth months: 57.2±18.3 (P < 0.05) and 81.4±24.6 (P < 0.05), respectively.

Mean preoperative controlled attenuation parameter and liver stiffness measurement values were 309.2±68.7 dB/m and 7.5±5.0 kPa, respectively, and significantly declined to 217.4±56.4 dB/m and 5.6±2.5 kPa, respectively, at sixth postoperative month (P < 0.001 and < 0.01, respectively).

These results suggest that laparoscopic sleeve gastrectomy is associated with significant improvement in liver steatosis and fibrosis.

Bariatric surgery has a beneficial effect on nonalcoholic fatty liver disease in morbidly obese patients.

Source for this statement

first author

Batman B, Altun H, Simsek B, Aslan E, Namli Koc S.

Supporting source

identity bridge

9.

Batman B, Altun H, Simsek B, Aslan E, Koc SN.

The effect of laparoscopic sleeve gastrectomy on nonalcoholic fatty liver disease.

Surg Laparosc Endosc Percutan Tech.

2019 May 17. doi: 10.1097/SLE.0000000000000672. [Epub ahead of print] PMID:31107849

Supporting source

denominator

Of the 120 consecutive patients screened, 72 were enrolled in this study.

Supporting source

follow-up, distinct from missing recruitment period

Percentage of excess weight loss was significant at the third and sixth months: 57.2±18.3 (P < 0.05) and 81.4±24.6 (P < 0.05), respectively.

Supporting source

Limits of interpretation

Recruitment dates and complications not given in accessible abstract.

Excess weight loss is not percentage of total body weight.

Selected cohort; possible overlap with other series.

Hiatal Hernia is More Frequent than Expected in Bariatric Patients. Intraoperative Findings during Laparoscopic Sleeve Gastrectomy.

Study population · excerpt 123

Preoperative upper gastrointestinal contrast series and endoscopy were performed for entire group study and demonstrated a hiatal hernia in 339 patients (48.78%).

[123]

Publication authors: Ionut Hutopila

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: six hundred ninety-five patients.

Reported recruitment period / follow-up: January 2015–May 2016

Recorded author position: first.

Background: obesity is a risk factor for gastro-esophageal disease (GERD) and hiatal hernia (HH) occurrence.

A substantial number of obese patients have HH.

Esophago-gastro-duodenoscopy (EGD) and Barium X-ray oral study are used for preoperative gastrointestinal evaluation.

Not all HH can be diagnosed before surgery, some are discovered during laparoscopic sleeve gastrectomy (LSG).

Aim to assess the possible correlations between intraoperative presence of hiatal hernia (known or new discovered) and preoperative clinical, radiological and endoscopic data specific for GERD and HH.

Setting single institution Ponderas Academic Hospital, Center of Excellence in Bariatric and Metabolic Surgery.

Material and Methods: The prospectively maintained database of the institution was retrospectively quired to identify all the patients who underwent primary Laparoscopic Sleeve Gastrectomy (LSG) without/with concomitant hiatal hernia (HH) repair between January 2015 to May 2016.

Patient characteristics, co-morbidities, GERD symptoms, radiologic oral contrast study, endoscopy and operative details were analyzed.

Results: six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).

Mean age of patients was 41 +- 11.71years and average body mass index (BMI) was 41.96 +- 7.28 kg/m2.

Preoperative upper gastrointestinal contrast series and endoscopy were performed for entire group study and demonstrated a hiatal hernia in 339 patients (48.78%).

In all these cases, HH was repaired concomitantly with LSG.

One hundred ninety-two patients (56.63%) were diagnosed with HH before operation and confirmed intraoperatively (Group A).

The diagnosis of hiatal hernia was established intraoperatively for 147 patients (43.37%) – group B, using the surgical protocol for active identification of preoperative undiagnosed hiatal hernia – SPAIH.

Conclusion preoperative investigations such as EGD and barium X-ray oral study are suboptimal in diagnosing HH, therefore, in a significant number of patients, the presence of HH has been established using our surgical protocol – SPAIH.

Crura approximation (HHR) concomitantly with laparoscopic sleeve gastrectomy is reproducible, may prevent the HH progression and possible GERD complications in the postoperative period of time.

Source for this statement

first author

Hutopila I, Copaescu C.

Supporting source

denominator

six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).

Supporting source

recruitment period

between January 2015 to May 2016.

Supporting source

Limits of interpretation

Retrospective detection study, not weight-loss or surgical complication-rate evidence.

The 43.37% denominator is 339 hernia patients, not all sleeve patients.

Abstract sequence on preoperative diagnosis is confusing; use explicit group definition.

Study population · excerpt 124

The diagnosis of hiatal hernia was established intraoperatively for 147 patients (43.37%) – group B, using the surgical protocol for active identification of preoperative undiagnosed hiatal hernia – SPAIH.

[124]

Publication authors: Ionut Hutopila

Methods: Sleeve gastrectomy

Study context and its limits

Study sample reported in this source record: six hundred ninety-five patients.

Reported recruitment period / follow-up: January 2015–May 2016

Recorded author position: first.

Background: obesity is a risk factor for gastro-esophageal disease (GERD) and hiatal hernia (HH) occurrence.

A substantial number of obese patients have HH.

Esophago-gastro-duodenoscopy (EGD) and Barium X-ray oral study are used for preoperative gastrointestinal evaluation.

Not all HH can be diagnosed before surgery, some are discovered during laparoscopic sleeve gastrectomy (LSG).

Aim to assess the possible correlations between intraoperative presence of hiatal hernia (known or new discovered) and preoperative clinical, radiological and endoscopic data specific for GERD and HH.

Setting single institution Ponderas Academic Hospital, Center of Excellence in Bariatric and Metabolic Surgery.

Material and Methods: The prospectively maintained database of the institution was retrospectively quired to identify all the patients who underwent primary Laparoscopic Sleeve Gastrectomy (LSG) without/with concomitant hiatal hernia (HH) repair between January 2015 to May 2016.

Patient characteristics, co-morbidities, GERD symptoms, radiologic oral contrast study, endoscopy and operative details were analyzed.

Results: six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).

Mean age of patients was 41 +- 11.71years and average body mass index (BMI) was 41.96 +- 7.28 kg/m2.

Preoperative upper gastrointestinal contrast series and endoscopy were performed for entire group study and demonstrated a hiatal hernia in 339 patients (48.78%).

In all these cases, HH was repaired concomitantly with LSG.

One hundred ninety-two patients (56.63%) were diagnosed with HH before operation and confirmed intraoperatively (Group A).

The diagnosis of hiatal hernia was established intraoperatively for 147 patients (43.37%) – group B, using the surgical protocol for active identification of preoperative undiagnosed hiatal hernia – SPAIH.

Conclusion preoperative investigations such as EGD and barium X-ray oral study are suboptimal in diagnosing HH, therefore, in a significant number of patients, the presence of HH has been established using our surgical protocol – SPAIH.

Crura approximation (HHR) concomitantly with laparoscopic sleeve gastrectomy is reproducible, may prevent the HH progression and possible GERD complications in the postoperative period of time.

Source for this statement

first author

Hutopila I, Copaescu C.

Supporting source

denominator

six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).

Supporting source

recruitment period

between January 2015 to May 2016.

Supporting source

Limits of interpretation

Retrospective detection study, not weight-loss or surgical complication-rate evidence.

The 43.37% denominator is 339 hernia patients, not all sleeve patients.

Abstract sequence on preoperative diagnosis is confusing; use explicit group definition.

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Research authors

Mohamed Hany

  • Ring-Augmented Versus Non-Ring Augmented Sleeve Gastrectomy in Patients with BMI > 50 kg/m²: 3-Year Follow-up of a Randomized Controlled Trial. (2026). Publication
  • Procedure-specific outcomes of robotic versus laparoscopic Roux-en-Y gastric bypass and biliopancreatic diversion with duodenal switch across a decade of MBSAQIP adoption. (2026). Publication
  • Anatomic Reversal of Gastric Bypass as a Last Resort for Refractory Complications: A Retrospective Case Series. (2026). Publication

Tom Mala

  • Effect of standard versus long alimentary limb distal Roux-en-Y gastric bypass on weight loss and nutritional outcomes at 10 years in patients with BMI 50-60 kg/m2-a secondary analysis of a randomized clinical trial. (2025). Publication
  • Metabolic Outcomes and Recurrent Weight Gain 10 Years After Roux-en-Y Gastric Bypass, a Longitudinal Cohort Study. (2026). Publication
  • Ten-Year Outcomes Following Roux-en-Y Gastric Bypass vs Duodenal Switch for High Body Mass Index: A Randomized Clinical Trial. (2024). Publication

Torsten Olbers

  • Metabolic and bariatric surgery versus intensive non-surgical treatment for adolescents with severe obesity (AMOS2): a multicentre, randomised, controlled trial in Sweden. (2023). Publication
  • Very low risk of short bowel after Roux-en-Y gastric bypass – a large nationwide Swedish cohort study. (2024). Publication
  • Surgical technique in constructing the jejunojejunostomy and the risk of small bowel obstruction after Roux-en-Y gastric bypass. (2022). Publication

Omar M Ghanem

  • Beyond initial weight loss: procedure-specific predictors of weight recurrence after metabolic and bariatric surgery. (2026). Publication
  • Beyond Initial Resolution: Predictors of Recurrence of Obesity-related Medical Conditions after Metabolic and Bariatric Surgery. (2026). Publication
  • Mapping the continuum of procedural bariatric care: real-world weight loss after endoscopic and surgical interventions. (2026). Publication

Piotr Major

  • Metabolic heterogeneity after laparoscopic sleeve gastrectomy in type 2 diabetes mellitus patients with severe obesity: insights from continuous glucose monitoring, glycemic profiles and quality of life. (2026). Publication
  • Pregnancy Outcomes After Metabolic Bariatric Surgery According to the Surgery-to-Conception Interval: A Multicentre Retrospective Cohort Study (MOMBARIS 2). (2026). Publication
  • What Really Matters in Weight Loss after Bariatric Surgery – 10 Years Follow-Up (BARI-10 -POL Study). (2026). Publication

Mohammad Kermansaravi

  • A Comparative Analysis of Postoperative Complications and Five-Year Metabolic Outcomes Following Metabolic and Bariatric Surgery in Patients with BMI 50-60 kg/m2 and BMI > 60 kg/m2. (2026). Publication
  • Prospective evaluation of hepatic steatosis and fibrosis after one anastomosis gastric bypass using transient elastography. (2026). Publication
  • Anemia Following One Anastomosis Gastric Bypass: A Comparative Study of Diabetic and Non-Diabetic Patients. (2026). Publication

Ali Aminian

  • Anastomotic marginal ulceration after conversion of sleeve gastrectomy to Roux-en-Y gastric bypass. (2026). Publication
  • Clinical outcomes of bariatric surgery in patients with obesity and idiopathic intracranial hypertension. (2025). Publication
  • Association between geospatial disparities in food security with weight loss and nutritional outcomes of metabolic surgery. (2024). Publication

Benjamin Clapp

  • Truncal Vagotomy and Gastrojejunostomy Revision for Treatment of Marginal Ulcer. (2025). Publication
  • Validation of the Michigan Bariatric Surgery Collaborative outcomes calculator in a Hispanic population. (2025). Publication
  • Cost drivers of gastric sleeve procedures performed using robotic platform. (2025). Publication

Enrique F Elli

  • Sleeve Gastrectomy to Roux-en-Y Gastric Bypass Conversion Versus Primary Roux-en-Y Gastric Bypass: Impact of Robotic Platform on Propensity-Matched Outcomes. (2026). Publication
  • Clinical outcomes in solid organ transplant recipients undergoing Roux-en-Y gastric bypass surgery: a propensity score-matched study. (2026). Publication
  • Clinical presentation and outcomes of revisional Roux-en-Y gastric bypass after failed gastric banding: direct versus sleeve-assisted approach. (2026). Publication

Mario Musella

  • Robotic versus laparoscopic one anastomosis gastric bypass (OAGB): a propensity score-matched comparative study of perioperative outcomes in 200 patients. (2026). Publication
  • Propensity score matched analysis of postoperative nausea and pain after one anastomosis gastric bypass (MGB/OAGB) versus sleeve gastrectomy (SG). (2023). Publication
  • Timing of Bariatric Surgery and COVID-19 Vaccination: Experience From a High-volume Single Center. (2023). Publication

Wendy A Brown

  • Is All Weight Loss Equal Following Sleeve Gastrectomy? Defining Body Composition and Anthropometric Thresholds for Hyperglycemia Remission in Women from a Prospective Cohort Study. (2026). Publication
  • Portable ultrasound shows closer agreement than bioimpedance with dual-energy X-ray absorptiometry for body composition monitoring after sleeve gastrectomy. (2026). Publication
  • Incidence and Indications for Revisional Metabolic Bariatric Surgery: A 10-Year Analysis from the Australian and New Zealand Registry. (2026). Publication

Everton Cazzo

  • Short-Term Evolution of MASLD Following Roux-en-Y Gastric Bypass: A Focus on Fibrotic MASH. (2025). Publication
  • Effects of bariatric surgery on renal function: a retrospective cohort study comparing one-year outcomes between one-anastomosis gastric bypass and Roux-en-Y gastric bypass. (2024). Publication
  • WEIGHT LOSS AND QUALITY OF LIFE AFTER ONE ANASTOMOSIS GASTRIC BYPASS: A 2-YEAR FOLLOW-UP STUDY. (2023). Publication

Jaime Ruiz-Tovar

  • Changes in the Bone Mineral Density after Sleeve Gastrectomy vs. Roux-En-Y Gastric Bypass 2 Years after Surgery. (2022). Publication
  • Improvement of Metabolic-Associated Fatty Liver Disease by Magnetic Resonance Spectroscopy in Morbidly Obese Women Undergoing Roux-en-Y Gastric Bypass, following a Postoperative Mediterranean-like Diet. (2024). Publication
  • Mammary Volume-to-Body Mass Index Ratio: Preoperative Predictor of Cardiovascular Risk Factor and Indicator of Long-term Postoperative Remission of Comorbidities in Premenopausal Women Undergoing Sleeve Gastrectomy. (2021). Publication

Adam Abu-Abeid

  • Management of Recurrent Weight Gain After Sleeve Gastrectomy: Comparative Effectiveness of Conversion Procedures Versus Obesity Management Medications. (2026). Publication
  • National Trends and Outcomes of Metabolic and Bariatric Surgery in Adolescents: Insights from the Israeli National Bariatric Surgery Registry. (2026). Publication
  • Long-Term Outcomes of One-Anastomosis Gastric Bypass in Class IV and Class V Obesity: A Comparative Analysis with Sleeve Gastrectomy. (2026). Publication

Gianfranco Silecchia

  • Long-Term Anatomical Durability and Clinical Outcomes of Concomitant Laparoscopic Sleeve Gastrectomy and Hiatal Hernia Repair: Up to 10-Year Multicenter Analysis. (2026). Publication
  • Short-term gut microbiota’s shift after laparoscopic Roux-en-Y vs one anastomosis gastric bypass: results of a multicenter randomized control trial. (2024). Publication
  • Readmission and reoperation rates after laparoscopic bariatric surgery in an Italian center of excellence. (2024). Publication

Stefano Olmi

  • Laparoscopic Revision of Sleeve Gastrectomy with Only Hiatal Hernia Repair for Gastroesophageal Reflux Disease: A Retrospective Study. (2026). Publication
  • Concomitant hiatal hernia repair during laparoscopic sleeve gastrectomy and 5-year endoscopic esophagitis: a retrospective cohort study of 400 patients. (2026). Publication
  • Gastroesophageal and bile reflux after one-anastomosis gastric bypass: long-term outcomes in a functionally evaluated cohort. (2026). Publication

Pichamol Jirapinyo

  • Impact of Endoscopic Bariatric and Metabolic Therapies on Chronic Kidney Disease in Patients with Impaired Glycemic Control. (2026). Publication
  • Endoscopic versus surgical management of recurrent weight gain following sleeve gastrectomy. (2026). Publication
  • The Impact of Endoscopic Gastric Remodeling on Gastroesophageal Reflux Disease. (2025). Publication
Sources (51)

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