Bariatric research: study numbers and their scope · Decision guide
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.
These excerpts describe study groups, not personal surgeon outcomes. Observation periods and follow-up are retained where stated in the excerpt; otherwise consult the linked publication.
Secondary outcomes included RWG, gastric pouch volumetry, relapse of associated medical problems, complications, endoscopic findings, laboratory parameters, and patient-reported outcomes (SF-36, Suter).
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Gastric banding · Sleeve gastrectomy
The analysis included 411,155 patients: 87,028 R-RYGB, 307,420 L-RYGB, 5,283 R-BPD-DS, and 11,424 L-BPD-DS.
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
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).
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
We conducted a retrospective case series of 13 patients (0.9% of 1,450 bypass patients) who underwent complete laparoscopic reversal to normal anatomy between 2020 and 2024.
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
Mean operative time was 76.0 ± 6.2 min with zero intraoperative complications.
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
All patients (100%) achieved complete resolution of their primary complication.
Linked publication authors (not confirmed operators): Mohamed Hany
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
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.
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery
Of 113 patients, 79 (69.9%, mean age 50 (s.d. 8.7) years, 50 (63%) females) patients were available for 10-year follow-up (41 standard RYGB, 38 distal RYGB).
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery
The 10-year mortality rate was 3.5% (4/113) and all deaths occurred after distal RYGB.
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery
RESULTS: Among a total of 582 patients operated, 311/544 (56%) patients attended 10-year follow-up.
Study sample recorded in the source: 582 patients. This is not necessarily the denominator for every outcome. Source wording: total of 582 patients
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
Forty-eight of the original 60 patients (80%) were assessed after a median of 12 (range, 9-13) years (mean [SD] age, 48.0 [6.0] years; 35 women [73%]).
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery
Four of 29 patients in the DS group (14%) developed severe protein-caloric malnutrition, of whom 3 (10%) underwent revisional surgery.
Linked publication authors (not confirmed operators): Tom Mala
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery
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).
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
The study included 57,255 patients having undergone RYGB.
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
Extensive small bowel resection, resulting in less than 1.5 meters of remaining small bowel, was required in 7 patients (.01%).
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
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.
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
We analyzed outcomes from 23,448 patients (mean follow-up = 4.3 ± 2.2 yr).
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
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).
Linked publication authors (not confirmed operators): Torsten Olbers
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
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).
Linked publication authors (not confirmed operators): Omar M Ghanem
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Omar M Ghanem
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
Obesity is a chronic, relapsing disease for which lifestyle and pharmacologic therapies, including glucagon-like peptide-1 receptor agonists, can achieve meaningful weight loss but are often limited by tolerability, access, and weight recurrence after discontinuation.
Linked publication authors (not confirmed operators): Omar M Ghanem
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Endoscopic sleeve gastroplasty · Sleeve gastrectomy
Among 2,825 patients (79.3% female; mean age 47.5 ± 11.9 years; mean baseline BMI 45.6 ± 7.9 kg/m2), 183 underwent ESG, 699 SG, 1,813 RYGB, and 130 BPD-DS.
Linked publication authors (not confirmed operators): Omar M Ghanem
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Endoscopic sleeve gastroplasty · Sleeve gastrectomy
RG included 15, while PG 18 patients.
Linked publication authors (not confirmed operators): Piotr Major
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
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).
Linked publication authors (not confirmed operators): Piotr Major
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Out of 368 analyzed patients the median BMI before the surgery was 42.73 kg/m2.
Linked publication authors (not confirmed operators): Piotr Major
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
This study aims to provide a comprehensive comparison of perioperative morbidity and mortality, weight loss trends, and medium to long-term outcomes following MBS in patients with a BMI ranging from 50 to 60 Kg/m2 and patients with a BMI > 60 Kg/m2.
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
his study included 1,430 patients with a BMI ≥ 50 kg/m², of whom 13.1% had a BMI ≥ 60 kg/m².
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
While ICU admission and 30-day mortality rates were higher in the BMI ≥ 60 kg/m² group, readmission rates and complications were similar between groups.
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
In conclusion, no statistically significant differences in readmission or complication rates were observed between patients with a BMI of 50-60 kg/m² and those with a BMI >60 kg/m² undergoing MBS.
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
A total of 85 patients were included, of whom 82 completed the 6-month transient elastography assessment.
Study sample recorded in the source: 85 patients. This is not necessarily the denominator for every outcome. Source wording: total of 85 patients
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
METHODS: A retrospective cohort study of 1664 patients aged 18–65 who underwent OAGB.
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
RESULTS: Among 1,664 patients (median age: 42 years; 82.1% female; 31.5% with T2DM), 13% developed anemia.
Linked publication authors (not confirmed operators): Mohammad Kermansaravi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
The study included 1910 patients who underwent primary RYGB and 202 patients who underwent SG-to-RYGB conversion.
Study sample recorded in the source: 1910 patients. This is not necessarily the denominator for every outcome. Source wording: included 1910 patients
Linked publication authors (not confirmed operators): Ali Aminian
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Study sample recorded in the source: 1910 patients. This is not necessarily the denominator for every outcome. Source wording: included 1910 patients
Linked publication authors (not confirmed operators): Ali Aminian
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Study sample recorded in the source: 97 patients. This is not necessarily the denominator for every outcome. Source wording: total of 97 patients
Linked publication authors (not confirmed operators): Ali Aminian
Recorded method links — read the excerpt for exact applicability: Gastric banding · Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Study sample recorded in the source: 97 patients. This is not necessarily the denominator for every outcome. Source wording: total of 97 patients
Linked publication authors (not confirmed operators): Ali Aminian
Recorded method links — read the excerpt for exact applicability: Gastric banding · Roux-en-Y gastric bypass · Sleeve gastrectomy
A total of 5097 patients were included in this study cohort, including 3424 patients who underwent RYGB and 1673 who underwent SG.
Study sample recorded in the source: 5097 patients. This is not necessarily the denominator for every outcome. Source wording: total of 5097 patients
Linked publication authors (not confirmed operators): Ali Aminian
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
Sixty-two percent of patients had a follow-up endoscopy by 1 year with no recurrences.
Linked publication authors (not confirmed operators): Benjamin Clapp
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
One hundred seventy-seven patients underwent sleeve gastrectomy (SG), and 99 patients underwent Roux-en-Y gastric bypass (RYGB) as their initial bariatric operation.
Study sample recorded in the source: 99 patients. This is not necessarily the denominator for every outcome. Source wording: 99 patients underwent
Linked publication authors (not confirmed operators): Benjamin Clapp
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
There were 27,778 patient records, of which 25.6% used LBS, 10.3% used OBS, and 64.1% were RS cases.
Linked publication authors (not confirmed operators): Benjamin Clapp
Recorded method links — read the excerpt for exact applicability: Robotic sleeve gastrectomy · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Benjamin Clapp
Recorded method links — read the excerpt for exact applicability: Robotic sleeve gastrectomy · Sleeve gastrectomy
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).
Study sample recorded in the source: 378 patients. This is not necessarily the denominator for every outcome. Source wording: included 378 patients
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy
A secondary 2:1 matched sub-analysis of robotic cases (n = 297) evaluated whether robotic assistance reduced differences between primary and revisional surgery.
Study sample recorded in the source: 378 patients. This is not necessarily the denominator for every outcome. Source wording: included 378 patients
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy
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).
Study sample recorded in the source: 378 patients. This is not necessarily the denominator for every outcome. Source wording: included 378 patients
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy
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).
Study sample recorded in the source: 378 patients. This is not necessarily the denominator for every outcome. Source wording: included 378 patients
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Robotic Roux-en-Y gastric bypass · Robotic sleeve gastrectomy · Sleeve gastrectomy
A retrospective review of a prospectively maintained database identified 566 patients who underwent primary robotic RYGB between January 2014 and December 2024.
Study sample recorded in the source: 68 patients. This is not necessarily the denominator for every outcome. Source wording: 68 patients were included
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
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.
Study sample recorded in the source: 68 patients. This is not necessarily the denominator for every outcome. Source wording: 68 patients were included
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
After propensity score matching, 68 patients were included (17 transplant recipients and 51 nontransplant patients).
Study sample recorded in the source: 68 patients. This is not necessarily the denominator for every outcome. Source wording: 68 patients were included
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
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).
Study sample recorded in the source: 68 patients. This is not necessarily the denominator for every outcome. Source wording: 68 patients were included
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
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).
Study sample recorded in the source: 68 patients. This is not necessarily the denominator for every outcome. Source wording: 68 patients were included
Linked publication authors (not confirmed operators): Enrique F Elli
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Robotic Roux-en-Y gastric bypass
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.
Study sample recorded in the source: 100 patients. This is not necessarily the denominator for every outcome. Source wording: 100 patients underwent
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Robotic mini gastric bypass · Robotic Roux-en-Y gastric bypass
After propensity score matching, 100 patients underwent robotic OAGB utilizing the Da Vinci Xi® system and 100 laparoscopic OAGB.
Study sample recorded in the source: 100 patients. This is not necessarily the denominator for every outcome. Source wording: 100 patients underwent
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Robotic mini gastric bypass · Robotic Roux-en-Y gastric bypass
Fifty-three individuals had a rescue administration of metoclopramide after LSG and 34 after OAGB (44.5% vs 31.2%, p = 0.04); additional painkillers were required by 41 patients after LSG and 23 after OAGB (34.5% vs 21.1%, p = 0.04).
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
A total of 108 patients were included: 33 (30.6%) of whom were in Group±30 and 74(69.4%) in Group>30.
Study sample recorded in the source: 108 patients. This is not necessarily the denominator for every outcome. Source wording: total of 108 patients
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
Findings revealed that postoperative outcomes (ie, 30-d complications and length of stay postoperatively) were comparable between groups.
Study sample recorded in the source: 108 patients. This is not necessarily the denominator for every outcome. Source wording: total of 108 patients
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
COVID-19 vaccination within 30 days of MBS does not impact complication rates and length of stay.
Study sample recorded in the source: 108 patients. This is not necessarily the denominator for every outcome. Source wording: total of 108 patients
Linked publication authors (not confirmed operators): Mario Musella
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
This prospective open-label, non-randomized trial was designed to include 20 patients with obesity.
Linked publication authors (not confirmed operators): Gerhard Prager
Recorded method links — read the excerpt for exact applicability: Gastric balloon
Patients with a body mass index (BMI) >35 kg/m² or >30 kg/m² with at least one obesity-related complication were eligible.
Linked publication authors (not confirmed operators): Gerhard Prager
Recorded method links — read the excerpt for exact applicability: Gastric balloon
In this retrospective cohort with prospective long-term follow-up, 60 patients (20 RYGB, 20 OAGB, and 20 SG) underwent primary MBS.
Linked publication authors (not confirmed operators): Gerhard Prager
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
A total of 50 patients were included in this study and went through all examinations.
Study sample recorded in the source: 50 patients. This is not necessarily the denominator for every outcome. Source wording: total of 50 patients
Linked publication authors (not confirmed operators): Gerhard Prager
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 50. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: Operations before 31st December 2022; mean follow-up 4.1 years
Recorded author position: last. Authorship does not establish who performed each operation.
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%.
denominator
A total of 50 patients were included in this study and went through all examinations.
period
This study includes primary OAGB patients operated at the Medical University of Vienna before 31st December 2022.
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
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.
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 50. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: Operations before 31st December 2022; mean follow-up 4.1 years
Recorded author position: last. Authorship does not establish who performed each operation.
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.
denominator
A total of 50 patients were included in this study and went through all examinations.
period
This study includes primary OAGB patients operated at the Medical University of Vienna before 31st December 2022.
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
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.
follow-up
The mean follow-up in this study was 4.1 ± 2.9 years, with a minimal follow-up of 1 year.
asymptomatic findings
Gastroscopy showed significant signs of chronic reflux exposure of the anastomosis, the pouch, and the distal esophagus, even in asymptomatic patients.
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.
Study sample recorded in the source: 2014 patients. This is not necessarily the denominator for every outcome. Source wording: 2014 LSG patients were analyzed
Linked publication authors (not confirmed operators): Halil Alis
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 2014. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: 2013–2023; follow-up 12 months
Recorded author position: last. Authorship does not establish who performed each operation.
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.
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.
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
limit
As a retrospective single-center study, our findings may be subject to selection bias and confounding factors not accounted for in the analysis.
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.
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.
Study sample recorded in the source: 121 patients. This is not necessarily the denominator for every outcome. Source wording: included 121 adult patients
Linked publication authors (not confirmed operators): Halil Alis
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Conclusions: Body composition changes following laparoscopic sleeve gastrectomy in this cohort of 121 patients were metric-dependent.
Study sample recorded in the source: 121 patients. This is not necessarily the denominator for every outcome. Source wording: included 121 adult patients
Linked publication authors (not confirmed operators): Halil Alis
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
This prospective, randomised trial included 50 patients undergoing LSG, assigned to either L-subcostal TAP or USG-subcostal TAP groups.
Study sample recorded in the source: 50 patients. This is not necessarily the denominator for every outcome. Source wording: included 50 patients
Linked publication authors (not confirmed operators): Halil Alis
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
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.
Study sample recorded in the source: 1356 patients. This is not necessarily the denominator for every outcome. Source wording: total of 1356 patients
Linked publication authors (not confirmed operators): Samet Yardimci
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 1356. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: 2020–2023
Recorded author position: last. Authorship does not establish who performed each operation.
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%.
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 ).
limit
Despite the study’s large sample size and the use of a control group, it was designed as a single-center retrospective analysis.
comparison result
Omentopexy has no additional benefit on early complications when using staple-line imbrication.
study affiliation
General Surgery Department, Istinye University VM Medical Park Pendik Hospital
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).
Study sample recorded in the source: 1356 patients. This is not necessarily the denominator for every outcome. Source wording: total of 1356 patients
Linked publication authors (not confirmed operators): Samet Yardimci
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 1356. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: 2020–2023
Recorded author position: last. Authorship does not establish who performed each operation.
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%.
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 ).
limit
Despite the study’s large sample size and the use of a control group, it was designed as a single-center retrospective analysis.
comparison result
Omentopexy has no additional benefit on early complications when using staple-line imbrication.
study affiliation
General Surgery Department, Istinye University VM Medical Park Pendik Hospital
In all, 151 patients were included in the study; of these, 124 (82.1%) were women and 27 (17.9%) were men.
Study sample recorded in the source: 151 patients. This is not necessarily the denominator for every outcome. Source wording: In all, 151 patients
Linked publication authors (not confirmed operators): Samet Yardimci
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 151. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: May–October 2022
Recorded author position: last. Authorship does not establish who performed each operation.
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.
period
Laparoscopic sleeve gastrectomy patients seen between May and October 2022 were included in the analysis
last authorship
Kara Yalcin Burak drburakkara@gmail.com 1 Buluc Halil 2 Elgezen Mehmet 3 Yildiz Edanur 4 Yardimci Samet 5
difficulty
According to the expert’s opinion, 123 cases were easy, 22 cases were intermediate, and 6 were difficult.
operator not named in this sentence
All operations were performed by the same surgeon and surgical team.
study affiliation
General Surgery Department, Istinye University VM Medical Park Pendik Hospital
RESULTS: Of 50 patients recruited, 39 completed the study.
Linked publication authors (not confirmed operators): Wendy A Brown
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
145,193 patients (median age 42 (IQR 33-50) years 78.7% female) underwent primary MBS.
Linked publication authors (not confirmed operators): Wendy A Brown
Recorded method links — read the excerpt for exact applicability: Gastric banding · Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
Over a median 5.6 y (IQR 2.9-8.1), 5,681 patients (4%) underwent a first revisional surgery (7.3 per 1,000 person-years; 95% CI, 7.1-7.4).
Linked publication authors (not confirmed operators): Wendy A Brown
Recorded method links — read the excerpt for exact applicability: Gastric banding · Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
Compared with RYGB, OAGB led to an equivalent improvement in renal function 1 year after the procedure, along with greater weight loss.
Linked publication authors (not confirmed operators): Everton Cazzo
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
After 2-years, excess weight loss was assessed, and post-surgical therapeutical success was determined using Reinhold’s criteria.
Linked publication authors (not confirmed operators): Everton Cazzo
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
Results – Out of 41 participants, 90.2% were female and the average age was 38±8.3 years old.
Linked publication authors (not confirmed operators): Everton Cazzo
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
In total, 650 patients were included in the study, and 523 patients (80.5%) underwent RYGB and 127 (19.5%) SG.
Study sample recorded in the source: 650 patients. This is not necessarily the denominator for every outcome. Source wording: 650 patients were included
Linked publication authors (not confirmed operators): Jaime Ruiz-Tovar
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Study sample recorded in the source: 12 patients. This is not necessarily the denominator for every outcome. Source wording: total of 12 patients
Linked publication authors (not confirmed operators): Jaime Ruiz-Tovar
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
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.
Study sample recorded in the source: 12 patients. This is not necessarily the denominator for every outcome. Source wording: total of 12 patients
Linked publication authors (not confirmed operators): Jaime Ruiz-Tovar
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass
A total of 195 patients were included: OAGB (n = 69), RYGB (n = 62), and OMM (n = 64).
Study sample recorded in the source: 195 patients. This is not necessarily the denominator for every outcome. Source wording: total of 195 patients
Linked publication authors (not confirmed operators): Adam Abu-Abeid
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
Comorbidity burden was high, including fatty liver disease (60-73.8%), obstructive sleep apnea (~ 51.3%), and type 2 diabetes (~ 20%).
Linked publication authors (not confirmed operators): Adam Abu-Abeid
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
A total of 121 patients were included: 76 underwent SG, and 45 underwent OAGB.
Study sample recorded in the source: 121 patients. This is not necessarily the denominator for every outcome. Source wording: total of 121 patients
Linked publication authors (not confirmed operators): Adam Abu-Abeid
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
Overall, 90-day postoperative complications did not differ between the groups (SG: 14.5% vs. OAGB: 11.1%, p = 0.78), nor did major complications rate (SG: 2.6% vs. OAGB: 0%, p = 0.53).
Study sample recorded in the source: 121 patients. This is not necessarily the denominator for every outcome. Source wording: total of 121 patients
Linked publication authors (not confirmed operators): Adam Abu-Abeid
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
One perioperative mortality was observed in the SG group (1.3%).
Study sample recorded in the source: 121 patients. This is not necessarily the denominator for every outcome. Source wording: total of 121 patients
Linked publication authors (not confirmed operators): Adam Abu-Abeid
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
To evaluate the 10-year recurrence rate, predictors of failure, and clinical outcomes following concomitant sleeve gastrectomy and hiatal hernia repair.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
This retrospective multicenter cohort study analyzed 111 patients who underwent sleeve gastrectomy with concomitant hiatal hernia repair between 2014 and 2015.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
The primary outcome was anatomical recurrence (> 2 cm transhiatal migration of the gastric sleeve).
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Among 111 patients, 108 were analyzed.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Hernia recurrence occurred in 14 patients (13.0%).
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Freedom from recurrence was 98.1% at 5 years and 68.9% at 10 years, although the 10-year estimate should be interpreted cautiously.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
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).
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Reintervention was required in 11 patients (10.2%), all with symptomatic GERD.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
54 patients completed the study, 27 for each procedure.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass
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.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
A total of 2297 patients were included in the study.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
Among them, 2143 underwent primary surgery and 154 patients underwent RBMS.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
Within 30 days after discharge, 48 patients (2.09%) were readmitted.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
Ten readmitted patients (20.8%) had complications graded IIIb or more (Clavien-Dindo classification) and needed additional procedures.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
Mortality rate was 4.17% among readmitted patients.
Linked publication authors (not confirmed operators): Gianfranco Silecchia
Recorded method links — read the excerpt for exact applicability: Revisional bariatric surgery
We retrospectively examined 6500 patients who underwent LSG between January 2015 and February 2023 who developed 6 months of GERD unresponsive to medical therapy with descriptive analysis. 240 patients met the inclusion criteria for the study.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Sleeve gastrectomy
This single-center retrospective cohort study, reported in accordance with STROBE, included 400 consecutive patients who underwent primary LSG in 2019.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Five-year endoscopy was available in 356 patients (89.0%).
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
HH was identified in 115/400 patients (28.8%) and repaired in 75 (65.2%).
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Barrett’s esophagus was identified in 4/356 patients (1.1%), and 88/356 (24.7%) were receiving proton-pump inhibitor therapy.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
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).
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
This retrospective cohort study included 150 consecutive patients undergoing laparoscopic OAGB between 2016 and 2023.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery
At last follow-up, 142 patients were available for evaluation, while 8 patients (5.3%) were lost to follow-up.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery
Postoperative GERD developed in 26 patients (17.3%), all of whom had a preoperative hypotensive lower esophageal sphincter (LES) (<16 mmHg).
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery
Bile reflux was diagnosed in 30 patients (20%) by pH-impedance monitoring and was refractory to medical therapy in all cases, leading to conversion to Roux-en-Y gastric bypass (RYGB) with complete symptom resolution.
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery
Anastomotic ulcers occurred in 15 patients (10%), including 3 perforations (2%).
Linked publication authors (not confirmed operators): Stefano Olmi
Recorded method links — read the excerpt for exact applicability: Mini / one-anastomosis gastric bypass · Roux-en-Y gastric bypass · Revisional bariatric surgery
A total of 220 SG patients underwent a revisional procedure.
Linked publication authors (not confirmed operators): Pichamol Jirapinyo
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
After propensity matching, 164 patients remained (82 in the ENDO group and 82 in the SURG group).
Linked publication authors (not confirmed operators): Pichamol Jirapinyo
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
Technical success was 100% in both groups.
Linked publication authors (not confirmed operators): Pichamol Jirapinyo
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
The SURG group had a higher serious adverse event rate (11% vs 0%; P = .003) and a longer hospital stay (2.2 ± 2.6 days vs 1.5 ± 0.8 days; P = .02).
Linked publication authors (not confirmed operators): Pichamol Jirapinyo
Recorded method links — read the excerpt for exact applicability: Roux-en-Y gastric bypass · Revisional bariatric surgery · Sleeve gastrectomy
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.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 174. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–September 2019
Recorded author position: first. Authorship does not establish who performed each operation.
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).
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.
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.
historical affiliation
1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey
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.
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.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 174. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–September 2019
Recorded author position: first. Authorship does not establish who performed each operation.
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).
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.
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.
historical affiliation
1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey
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.
The mean hospital stay was 3.1±0.7 days.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 174. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–September 2019
Recorded author position: first. Authorship does not establish who performed each operation.
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).
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.
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.
historical affiliation
1 Department of General Surgery, Istinye University Faculty of Medicine, Istanbul, Turkey
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.
A total of 1200 consecutive patients who underwent sleeve gastrectomy and omentopexy between March 2013 and December 2018 were enrolled in this retrospective study.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 1200. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–December 2018
Recorded author position: first. Authorship does not establish who performed each operation.
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.
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
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.
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.
Of 1200 patients, 864 (72%) were female and 336 (28%) were male.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 1200. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–December 2018
Recorded author position: first. Authorship does not establish who performed each operation.
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.
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
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.
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.
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.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 1200. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: March 2013–December 2018
Recorded author position: first. Authorship does not establish who performed each operation.
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.
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
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.
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.
Of the 120 consecutive patients screened, 72 were enrolled in this study.
Linked publication authors (not confirmed operators): Burcin Batman
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: 72. This is not necessarily the denominator for every outcome.
Recorded author position: first. Authorship does not establish who performed each operation.
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.
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
denominator
Of the 120 consecutive patients screened, 72 were enrolled in this study.
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.
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.
Preoperative upper gastrointestinal contrast series and endoscopy were performed for entire group study and demonstrated a hiatal hernia in 339 patients (48.78%).
Linked publication authors (not confirmed operators): Ionut Hutopila
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: six hundred ninety-five patients. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: January 2015–May 2016
Recorded author position: first. Authorship does not establish who performed each operation.
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.
denominator
six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).
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.
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.
Linked publication authors (not confirmed operators): Ionut Hutopila
Recorded method links — read the excerpt for exact applicability: Sleeve gastrectomy
Study-team evidence, not a personal surgeon outcome rate. Groups may overlap with other publications; do not add their patient counts.
Study sample reported in this source record: six hundred ninety-five patients. This is not necessarily the denominator for every outcome.
Reported recruitment period / follow-up: January 2015–May 2016
Recorded author position: first. Authorship does not establish who performed each operation.
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.
denominator
six hundred ninety-five patients (260 male and 435 female) were identified meeting inclusion criteria (LSG +- HH repair).
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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