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Lange UG, Mehdorn M, Dietrich A. [Anastomotic techniques in minimally invasive bariatric surgery]. CHIRURGIE (HEIDELBERG, GERMANY) 2023; 94:768-774. [PMID: 37367961 DOI: 10.1007/s00104-023-01907-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND Recommendations for the use of specific anastomotic techniques are not available in laparoscopic bariatric surgery. Recommendation criteria should consider the rate of insufficiency, bleeding, tendency to stricture or ulceration as well as the impact on weight loss or dumping. OBJECTIVE This article gives a review of the available evidence on the anastomotic techniques of typical surgical procedures in laparoscopic bariatric surgery. MATERIAL AND METHODS The current literature was reviewed and is discussed regarding anastomotic techniques for Roux-en‑Y gastric bypass (RYGB), one-anastomosis gastric bypass (OAGB), single anastomosis sleeve ileal (SASI) bypass and biliopancreatic diversion with duodenal switch (BPD-DS). RESULTS Few comparative studies exist, except for the RYGB. In RYGB gastrojejunostomy, a complete manual suture was shown to be equivalent to a mechanical anastomosis. In addition, the linear staple suture showed slight advantages over the circular stapler in terms of wound infections and bleeding. The anastomosis technique of the OAGB and SASI can be performed entirely with a linear stapler or with suture closure of the anterior wall defect. There seems to be an advantage of manual anastomosis in BPD-DS. CONCLUSION Due to the lack of evidence, no recommendations can be made. Only in RYGB was there an advantage of the linear stapler technique with hand closure of the stapler defect compared to the linear stapler. In principle, prospective, randomized studies should be strived for.
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Affiliation(s)
- Undine Gabriele Lange
- Klinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland
| | - Matthias Mehdorn
- Klinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland
| | - Arne Dietrich
- Klinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland.
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2
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Wallhuss A, Ottosson J, Cao Y, Andersson E, Bergemalm D, Eriksson C, Olén O, Szabo E, Stenberg E. Outcomes of bariatric surgery for patients with prevalent inflammatory bowel disease: A nationwide registry-based cohort study. Surgery 2023; 174:144-151. [PMID: 37263879 DOI: 10.1016/j.surg.2023.04.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/11/2023] [Accepted: 04/27/2023] [Indexed: 06/03/2023]
Abstract
BACKGROUND Obesity is becoming more prevalent in patients with inflammatory bowel disease. Although bariatric surgery is an effective treatment for obesity, questions remain regarding its safety and effectiveness for patients with inflammatory bowel disease. The aim of this study was to evaluate the safety and effectiveness of bariatric surgery in patients with inflammatory bowel disease. METHOD This registry-based, propensity-matched cohort study included all patients who had primary Roux-en-Y gastric bypass or sleeve gastrectomy in Sweden from January 2007 to June 2020 who had an inflammatory bowel disease diagnosis and matched control patients without an inflammatory bowel disease diagnosis. The study included data from the Scandinavian Obesity Surgery Registry, the National Patient Register, the Swedish Prescribed Drugs Register, the Total Population Register, and the Education Register from Statistics Sweden. RESULTS In total, 71,093 patients who underwent bariatric surgery, including 194 with Crohn's disease and 306 with ulcerative colitis, were 1:5 matched to non-inflammatory bowel disease control patients. The patients with Crohn's disease had a higher readmission rate within 30 days (10.7% vs 6.1%, odds ratio = 1.84, 95% confidence interval 1.02-3.31) than the control patients, with no significant difference between the surgical methods. The patients with ulcerative colitis had a higher risk for serious postoperative complications after Roux-en-Y gastric bypass (8.0% vs 3.7%, odds ratio = 2.64, 95% confidence interval 1.15-6.05) but not after sleeve gastrectomy compared to control patients (0.8% vs 2.3%). No difference was observed in postoperative weight loss or postoperative health-related quality of life. CONCLUSION Sleeve gastrectomy appears to be a safe and effective treatment for obesity in patients with inflammatory bowel disease, whereas Roux-en-Y gastric bypass was associated with a higher risk for postoperative complications in patients with ulcerative colitis.
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Affiliation(s)
- Andreas Wallhuss
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Sweden
| | - Johan Ottosson
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Sweden
| | - Yang Cao
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Sweden
| | - Ellen Andersson
- Department of Biomedical and Clinical Sciences, Linköping University and Department of Surgery, Vrinnevi, Norrköping, Sweden
| | - Daniel Bergemalm
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Sweden
| | - Carl Eriksson
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Sweden; Clinical Epidemiology Department, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Ola Olén
- Clinical Epidemiology Department, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Sachs' Children and Youth Hospital, Stockholm South General Hospital, Sweden
| | - Eva Szabo
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Sweden
| | - Erik Stenberg
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Sweden.
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Aleassa EM, Papasavas P, Augustin T, Khorgami Z, Benson-Davies S, Ghiassi S, Carter J, Nimeri A. American Society for Metabolic and Bariatric Surgery literature review on the effect of Roux-en-Y gastric bypass limb lengths on outcomes. Surg Obes Relat Dis 2023; 19:755-762. [PMID: 37268517 DOI: 10.1016/j.soard.2023.04.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 04/02/2023] [Indexed: 06/04/2023]
Abstract
This literature review is issued by the American Society for Metabolic and Bariatric Surgery regarding limb lengths in Roux-en-Y gastric bypass (RYGB) and their effect on metabolic and bariatric outcomes. Limbs in RYGB consist of the alimentary and biliopancreatic limbs and the common channel. Variation of limb lengths in primary RYGB and as a revisional option for weight recurrence after RYGB are described in this review.
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Affiliation(s)
- Essa M Aleassa
- Department of General Surgery, Digestive Disease Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates.
| | | | - Toms Augustin
- Department of General Surgery, Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, Ohio
| | - Zhamak Khorgami
- Department of Surgery, University of Oklahoma College of Community Medicine, Tulsa, Oklahoma
| | - Sue Benson-Davies
- Department of Surgery, Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota
| | - Saber Ghiassi
- Department of Surgery, Yale School of Medicine, New Haven, Connecticut
| | - Jonathan Carter
- Department of Surgery, University of California, San Francisco, California
| | - Abdelrahman Nimeri
- Department of Surgery, Carolinas Medical Center, University of North Carolina, Charlotte, North Carolina
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Shariq OA, Portela R, Bews KA, Mundi MS, Kellogg T, Habermann EB, Dayyeh BA, Kendrick ML, Ghanem OM. Impact of Early Gastrojejunal Stenosis on Weight Loss in Patients Undergoing Roux-en-Y Gastric Bypass. Surg Laparosc Endosc Percutan Tech 2023; 33:202-206. [PMID: 36971521 DOI: 10.1097/sle.0000000000001165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/14/2023] [Indexed: 03/29/2023]
Abstract
BACKGROUND Gastrojejunal (GJ) anastomotic stenosis is a well-described complication after Roux-en-Y gastric bypass (RYGB); however, its impact on weight loss outcomes is not well elucidated. METHODS We performed a retrospective cohort study of adult patients who underwent RYGB at our institution between 2008 and 2020. Propensity score matching was used to match 30 patients who developed GJ stenosis within the first 30 days post-RYGB with 120 control patients who did not develop this outcome. Short and long-term complications and mean percentage of total body weight loss (TWL) were recorded at 3 months, 6 months, 1 year, 2 years, 3 to 5 years, and 5 to 10 years postoperatively. Hierarchical linear regression modeling was used to analyze the association between early GJ stenosis and the mean percentage of TWL. RESULTS Patients who developed early GJ stenosis had a 13.6% increase in the mean percentage of TWL when compared with controls in the hierarchical linear model [ P < 0.001 (95% CI: 5.7; 21.5)]. These patients were also more likely to present to an intravenous infusion center (70% vs 4%; P < 0.01), require readmission within 30 days (16.7% vs 2.5%; P < 0.01), and/or develop an internal hernia (23.3% vs 5.0%) postoperatively. CONCLUSIONS Patients who develop early GJ stenosis after RYGB have a greater degree of long-term weight loss compared with patients who do not develop this complication. Although our findings support the key contribution that restrictive mechanisms play in maintaining weight loss after RYGB, GJ stenosis remains a complication associated with significant morbidity.
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Affiliation(s)
| | | | - Katherine A Bews
- Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery
| | | | | | | | - Barham Abu Dayyeh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN
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5
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Seidemann L, Moulla Y, Dietrich A. [Current evidence on loop length in intestinal bypass procedures]. CHIRURGIE (HEIDELBERG, GERMANY) 2023; 94:506-511. [PMID: 36894649 DOI: 10.1007/s00104-023-01842-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Accepted: 02/07/2023] [Indexed: 03/11/2023]
Abstract
BACKGROUND Intestinal bypass procedures are well recognized for their long-term weight reduction and control of metabolic comorbidities. The selection of the length of the small bowel loop has a significant influence on the positive and also negative effects of the chosen procedure but national and international standardization are missing. OBJECTIVE The aim of this article is to give an overview of the current evidence on the various intestinal bypass procedures and the influence of the chosen small bowel loop length on the desired and adverse postoperative outcomes. The IFSO 2019 consensus recommendations on the standardization of bariatric surgery and metabolic procedures form the basis of these considerations. MATERIAL AND METHODS The current literature was searched for comparative studies addressing the question of different small bowel loop lengths in a Roux-en‑Y gastric bypass, one anastomosis gastric bypass, single anastomosis duodenoileal bypass with sleeve gastrectomy and biliopancreatic diversion (with duodenal switch). RESULTS Due to the heterogeneity of currently available studies and interindividual differences in total small bowel lengths in humans, it is difficult to give definitive recommendations for the choice of small bowel loop lengths. The longer the biliopancreatic loop (BPL) or the shorter the common channel (CC), the higher is the risk of (severe) malnutrition. To prevent malnutrition, the BPL should not be longer than 200 cm and the CC should have a length of at least 200 cm. CONCLUSION The intestinal bypass procedures recommended in the German S3 guidelines are safe and show good long-term outcomes. As part of the postbariatric follow-up, the nutritional status of patients following an intestinal bypass has to be followed-up on the long term in order to avoid malnutrition preferably prior to a clinical manifestation.
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Affiliation(s)
- Lena Seidemann
- Bereich Adipositas-, metabolische und endokrine Chirurgie, Klinik u. Poliklinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland
| | - Yusef Moulla
- Bereich Adipositas-, metabolische und endokrine Chirurgie, Klinik u. Poliklinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland
| | - Arne Dietrich
- Bereich Adipositas-, metabolische und endokrine Chirurgie, Klinik u. Poliklinik für Viszeral‑, Transplantations‑, Thorax- und Gefäßchirurgie, Universitätsklinikum Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland.
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Romeijn MM, van Hoef S, Janssen L, van de Pas KGH, van Dielen FMH, Luijten AAPM, Göttgens KWA, Greve JWM, Leclercq WKG. Comparison of Linear versus Circular-Stapled Gastroenterostomy in Roux-en-Y Gastric Bypass: A Nationwide Population-Based Cohort Study. Obes Surg 2021; 31:3579-3587. [PMID: 33905068 PMCID: PMC8270800 DOI: 10.1007/s11695-021-05436-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/10/2021] [Accepted: 04/13/2021] [Indexed: 01/13/2023]
Abstract
Background When performing a Roux-en-Y gastric bypass (RYGB), the gastroenterostomy can be constructed with a circular stapled or linear stapled technique. The size of the gastroenterostomy depends on the stapling method and this may affect weight loss outcomes. The aim of this study was to examine the impact of the stapling technique on weight loss outcomes after RYGB. Methods This is a nationwide population-based cohort study of patients that received a RYGB. Data were derived from the Dutch Audit of Treatment of Obesity. Primary outcome was the impact of stapling technique on the rate of non-response defined as significant weight regain (≥20% of a patients’ lost weight) 2–4 years post-surgery, after initial successful weight loss (≥20% total weight loss, TWL). Secondary outcomes were the rate of response, defined as successful weight loss (≥20% TWL) within 1.5 years post-surgery, the incidence of complications and the progression of comorbidities. Results In a cohort of 12,468 patients, non-response was equally distributed between both groups (circular 18.0% vs. linear 17.6%). No differences in response rate (circular 97.0% vs. linear 96.5%) or %TWL were observed up to 4 years post-surgery. Patients in the circular stapled group experienced more complications, specifically major bleedings (2.4% vs. 1.2%; p=0.002) within 30 days postoperatively. No differences were found in deteriorated comorbidities, neither in de novo developed comorbidities. Conclusion When comparing stapling technique in RYGB, weight loss outcomes did not differ during a 4-year follow-up period. The linear stapled gastroenterostomy could pose an advantage due to its lower complication rate. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s11695-021-05436-4.
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Affiliation(s)
- Marleen M Romeijn
- Department of Surgery, Máxima Medical Center, Veldhoven, The Netherlands. .,Research School NUTRIM, Department of Surgery, Maastricht University Medical Center, Maastricht, the Netherlands.
| | - Stijn van Hoef
- Department of Surgery, Máxima Medical Center, Veldhoven, The Netherlands
| | - Loes Janssen
- Department of Surgery, Máxima Medical Center, Veldhoven, The Netherlands
| | - Kelly G H van de Pas
- Department of Surgery, Máxima Medical Center, Veldhoven, The Netherlands.,Research School NUTRIM, Department of Surgery, Maastricht University Medical Center, Maastricht, the Netherlands
| | | | | | - Kevin W A Göttgens
- Department of Surgery, Máxima Medical Center, Veldhoven, The Netherlands
| | - Jan Willem M Greve
- Research School NUTRIM, Department of Surgery, Maastricht University Medical Center, Maastricht, the Netherlands.,Department of Surgery, Zuyderland Medical Center, Heerlen, the Netherlands
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7
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Petrucciani N, Etienne JH, Sebastianelli L, Iannelli A. Roux-en-Y gastric bypass as revisional surgery. Minerva Surg 2021; 76:8-16. [PMID: 33754587 DOI: 10.23736/s2724-5691.20.08493-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Roux-en-Y gastric bypass (RYGB) is a worldwide-performed procedure as primary surgery, and as conversional procedure after complications and/or failure of other bariatric procedures. RYGB can be performed as revisional surgery after adjustable gastric banding, vertical banded gastroplasty, sleeve gastrectomy and one anastomosis gastric bypass. Each of these revisional procedures may be technically challenging, and accurate preoperative work-up and operative planning is required. If correctly performed, RYGB as revisional procedure is associated with satisfying outcomes and is indicated in the treatment of insufficient weight loss and postoperative complications of a primary bariatric procedure - such as chronic leak or gastroesophageal reflux after sleeve gastrectomy. The present article analyzes the most important indications, technical points and tips and tricks to safely perform RYGB as a secondary procedure.
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Affiliation(s)
- Niccolò Petrucciani
- Department of Medical and Surgical Sciences and Translational Medicine, Faculty of Medicine and Psychology, St. Andrea Hospital, Sapienza University, Rome, Italy
| | - Jean H Etienne
- Department of Medical and Surgical Sciences and Translational Medicine, Faculty of Medicine and Psychology, St. Andrea Hospital, Sapienza University, Rome, Italy.,Université Côte d'Azur, Nice, France
| | - Lionel Sebastianelli
- Department of Medical and Surgical Sciences and Translational Medicine, Faculty of Medicine and Psychology, St. Andrea Hospital, Sapienza University, Rome, Italy.,Université Côte d'Azur, Nice, France
| | - Antonio Iannelli
- Université Côte d'Azur, Nice, France - .,Unit of Digestive Surgery and Liver Transplantation, University Hospital of Nice, Nice, France.,Inserm U1065, Nice, France
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8
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Bariatric Surgery-How Much Malabsorption Do We Need?-A Review of Various Limb Lengths in Different Gastric Bypass Procedures. J Clin Med 2021; 10:jcm10040674. [PMID: 33578635 PMCID: PMC7916324 DOI: 10.3390/jcm10040674] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/06/2021] [Accepted: 02/07/2021] [Indexed: 12/18/2022] Open
Abstract
The number of obese individuals worldwide continues to increase every year, thus, the number of bariatric/metabolic operations performed is on a constant rise as well. Beside exclusively restrictive procedures, most of the bariatric operations have a more or less malabsorptive component. Several different bypass procedures exist alongside each other today and each type of bypass is performed using a distinct technique. Furthermore, the length of the bypassed intestine may differ as well. One might add that the operations are performed differently in different parts of the world and have been changing and evolving over time. This review evaluates the most frequently performed bariatric bypass procedures (and their variations) worldwide: Roux-en-Y Gastric Bypass, One-Anastomosis Gastric Bypass, Single-Anastomosis Duodeno-Ileal Bypass + Sleeve Gastrectomy, Biliopancreatic Diversion + Duodenal Switch and operations due to weight regain. The evaluation of the procedures and different limb lengths focusses on weight loss, remission of comorbidities and the risk of malnutrition and deficiencies. This narrative review does not aim at synthesizing quantitative data. Rather, it provides a summary of carefully selected, high-quality studies to serve as examples and to draw tentative conclusions on the effects of the bypass procedures mentioned above. In conclusion, it is important to carefully choose the procedure and small bowel length excluded from the food passage suited best to each individual patient. A balance has to be achieved between sufficient weight loss and remission of comorbidities, as well as a low risk of deficiencies and malnutrition. In any case, at least 300 cm of small bowel should always remain in the food stream to prevent the development of deficiencies and malnutrition.
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Smelt HJM, Van Rijn S, Pouwels S, Aarts MPW, Smulders JF. The Influence of Different Alimentary and Biliopancreatic Limb Lengths in Gastric Bypass Patients. Obes Surg 2020; 31:481-489. [PMID: 33052551 DOI: 10.1007/s11695-020-05028-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE The aim of this study was to compare the effect of two different limb lengths after RYGB on weight loss, postoperative gastro-intestinal complications, and vitamin deficiencies. MATERIALS AND METHODS A retrospective analyses of 100 patients after RYGB with 2 different limb lengths were done. Group A (50 patients) had a biliopancreatic limb (BPL) of 75 cm and an alimentary limb (AL) of 150 cm. Group B (50 patients) had a BPL of 150 cm and an AL of 75 cm. The effect on weight loss, body mass index, excess weight loss (EWL), total weight loss (TWL), and postoperative complications was analyzed up to 2 years postoperatively. RESULTS Patients with a longer BPL achieved significantly more %EWL compared to a shorter BPL 2 years postoperatively (82.8 ± 31.2 versus 93.8 ± 15.1; p = 0.038). A significant difference was also seen in %TWL after 1 year (30.3 ± 10.1 versus 37.4 ± 6.9; p < 0.01) and 2 years (31.6 ± 7.5 versus 35.6 ± 8.6; p = 0.022), both in favor of group B. However, patients with a longer BPL (group B) showed significant more diarrhea and steatorrhea compared to group A (p < 0.01). CONCLUSION BPL of 150 cm is associated with more %EWL and %TWL 2 years after RYGB. However, it is accompanied by an increase of diarrhea and steatorrhea to disadvantage off group B. Future studies need to focus on further tailoring BPL and AL lengths to achieve the best possible outcomes for patients with morbid obesity.
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Affiliation(s)
- H J M Smelt
- Obesity Center, Catharina Hospital, Eindhoven, The Netherlands. .,Department of Surgery, Catharina Hospital, Michelangelolaan 2 P.O. Box 1350, 5602, ZA, Eindhoven, The Netherlands.
| | - S Van Rijn
- Department of Surgery, University Medical Center Maastrischt, Maastricht, The Netherlands
| | - S Pouwels
- Department of Intensive Care Medicine, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands
| | - M P W Aarts
- Obesity Center, Catharina Hospital, Eindhoven, The Netherlands
| | - J F Smulders
- Obesity Center, Catharina Hospital, Eindhoven, The Netherlands.,Department of Surgery, Catharina Hospital, Michelangelolaan 2 P.O. Box 1350, 5602, ZA, Eindhoven, The Netherlands
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10
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Mahawar K. We Should Now Study Bilio-Pancreatic Limb of 100 cm with One Anastomosis Gastric Bypass. Obes Surg 2020; 31:877-878. [PMID: 32862399 DOI: 10.1007/s11695-020-04952-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 07/22/2020] [Accepted: 08/27/2020] [Indexed: 02/02/2023]
Affiliation(s)
- Kamal Mahawar
- Bariatric Unit, Sunderland Royal Hospital, Sunderland, SR4 7TP, UK.
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