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Loganathan P, Gajendran M, Perisetti A, Goyal H, Mann R, Wright R, Saligram S, Thosani N, Umapathy C. Endoscopic Advances in the Diagnosis and Management of Gastroesophageal Reflux Disease. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:1120. [PMID: 39064549 PMCID: PMC11278532 DOI: 10.3390/medicina60071120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/01/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024]
Abstract
Gastroesophageal reflux disease (GERD) is one of the most common diseases that occurs secondary to failure of the antireflux barrier system, resulting in the frequent and abnormal reflux of gastric contents to the esophagus. GERD is diagnosed in routine clinical practice based on the classic symptoms of heartburn and regurgitation. However, a subset of patients with atypical symptoms can pose challenges in diagnosing GERD. An esophagogastroduodenoscopy (EGD) is the most common initial diagnostic test used in the assessment for GERD, although half of these patients will not have any positive endoscopic findings suggestive of GERD. The advanced endoscopic techniques have improved the diagnostic yield of GERD diagnosis and its complications, such as Barrett's esophagus and early esophageal adenocarcinoma. These newer endoscopic tools can better detect subtle irregularities in the mucosa and vascular structures. The management options for GERD include lifestyle modifications, pharmacological therapy, and endoscopic and surgical interventions. The latest addition to the armamentarium is the minimally invasive endoscopic interventions in carefully selected patients, including the electrical stimulation of the LES, Antireflux mucosectomy, Radiofrequency therapy, Transoral Incisionless Fundoplication, Endoscopic Full-Thickness plication (GERDx™), and suturing devices. With the emergence of these advanced endoscopic techniques, it is crucial to understand their selection criteria, advantages, and disadvantages.
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Affiliation(s)
- Priyadarshini Loganathan
- Division of Gastroenterology & Nutrition, The University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA; (P.L.); (M.G.); (R.W.)
| | - Mahesh Gajendran
- Division of Gastroenterology & Nutrition, The University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA; (P.L.); (M.G.); (R.W.)
| | - Abhilash Perisetti
- Department of Gastroenterology and Hepatology, Kansas City VA Medical Center, Kansas City, MO 64128, USA;
| | - Hemant Goyal
- Department of Gastroenterology, Borland Groover, Baptist Medical Center-Downtown, Jacksonville, FL 32207, USA
| | - Rupinder Mann
- Department of Gastroenterology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | - Randy Wright
- Division of Gastroenterology & Nutrition, The University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA; (P.L.); (M.G.); (R.W.)
| | - Shreyas Saligram
- Department of Gastroenterology, Robert Wood Johnson University Hospital, New Brunswick, NJ 08901, USA;
| | - Nirav Thosani
- Department of Surgery, McGovern Medical School at UT Health, Houston, TX 77030, USA;
| | - Chandraprakash Umapathy
- Division of Gastroenterology & Nutrition, Audie L. Murphy VA Hospital, San Antonio, TX 78229, USA;
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Rapolti DI, Monrabal Lezama M, Manueli Laos EG, Schlottmann F, Masrur MA. Management of Gastroesophageal Reflux Disease after Sleeve Gastrectomy: Effectiveness of Medical, Endoscopic, and Surgical Therapies. J Laparoendosc Adv Surg Tech A 2024; 34:581-602. [PMID: 38568115 DOI: 10.1089/lap.2024.0111] [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] [Indexed: 07/26/2024] Open
Abstract
Introduction: Sleeve gastrectomy (SG) has become the most frequently performed bariatric operation in the United States. One of the main disadvantages of this procedure is the risk of developing gastroesophageal reflux disease (GERD) after the operation. We aimed to analyze different approaches for the treatment of GERD after SG. Methods: A literature review was performed to identify all possible treatment options for post-SG GERD. All the studies were assessed for full eligibility by manual assessment of their aims, methodology, results, and conclusions. Records were individually reviewed by the authors comparing outcomes and complications between procedures. Results: Although some studies have shown improvement or even resolution of GERD symptoms after SG, most patients develop or worsen symptoms. Lifestyle modifications along with medical therapy should be started on patients with GERD after SG. For those who are refractory to medication, endoscopic and surgical therapies can be offered. Conversion to Roux-en-Y gastric bypass (RYGB) is consistently effective in treatment of GERD and is the ideal therapy in patients with associated insufficient weight loss. Endoscopic and alternative surgical procedures are also available and have shown acceptable short-term outcomes. Conclusions: Several treatment options exist for the treatment of GERD after SG. Although conversion to RYGB remains the most effective therapy, other emerging endoscopic and surgical procedures could avoid the potential morbidity of this procedure and should be further evaluated. An evidence-based algorithm for the management of GERD after SG is proposed to guide decision making.
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Affiliation(s)
- Diana I Rapolti
- Department of Surgery, University of Illinois, Chicago, Illinois, USA
| | | | | | - Francisco Schlottmann
- Department of Surgery, University of Illinois, Chicago, Illinois, USA
- Department of Surgery, Hospital Alemán of Buenos Aires, Buenos Aires, Argentina
| | - Mario A Masrur
- Department of Surgery, University of Illinois, Chicago, Illinois, USA
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Shi C, ZhuoMa G, Ying L, Zhang Z, Cui L, Li R, Zhang J. Efficacy and safety of endoscopic cardia peripheral tissue scar formation (ECSF) for the treatment of refractory gastroesophageal reflux disease: A systematic review with meta-analysis. Medicine (Baltimore) 2024; 103:e37062. [PMID: 38457552 PMCID: PMC10919480 DOI: 10.1097/md.0000000000037062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/28/2023] [Accepted: 01/04/2024] [Indexed: 03/10/2024] Open
Abstract
BACKGROUND Endoscopic treatment is increasingly used for refractory gastroesophageal reflux disease (rGERD). Unlike the mechanism of conventional surgical fundoplication, gastroesophageal junction ligation, anti-reflux mucosal intervention, and radiofrequency ablation have extremely similar anti-reflux mechanisms; hence, we collectively refer to them as endoscopic cardia peripheral tissue scar formation (ECSF). We conducted a systematic review and meta-analysis to assess the safety and efficacy of ECSF in treating rGERD. METHODS We performed a comprehensive search of several databases, including PubMed, Embase, Medline, China Knowledge Network, and Wanfang, to ensure a systematic approach for data collection between January 2011 and July 2023. Forest plots were used to summarize and combine the GERD-health-related quality of life (HRQL), gastroesophageal reflux questionnaire score, and DeMeester scores, acid exposure time, lower esophageal sphincter pressure, esophagitis, proton pump inhibitors use, and patient satisfaction. RESULTS This study comprised 37 studies, including 1732 patients. After ECSF, significant improvement in gastroesophageal reflux disease health-related quality of life score (mean difference [MD] = 18.27 95% CI: 14.81-21.74), gastroesophageal reflux questionnaire score (MD = 4.85 95% CI: 3.96-5.75), DeMeester score (MD = 42.34, 95% CI: 31.37-53.30), acid exposure time (MD = 7.98, 95% CI: 6.03-9.92), and lower esophageal sphincter pressure was observed (MD = -5.01, 95% CI: -8.39 to 1.62). The incidence of serious adverse effects after ECSF was 1.1% (95% CI: 0.9%-1.2%), and postoperatively, 67.4% (95% CI: 66.4%-68.2%) of patients could discontinue proton pump inhibitor-like drugs, and the treatment outcome was observed to be satisfactory in over 80% of the patients. Subgroup analyses of the various procedures showed that all 3 types improved several objective or subjective patient indicators. CONCLUSIONS Based on the current meta-analysis, we conclude that rGERD can be safely and effectively treated with ECSF as an endoscopic procedure.
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Affiliation(s)
- Chaoyi Shi
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - GeSang ZhuoMa
- Center for General Practice Medicine, Department of Gastroenterology, Zhejiang Provincial People’s Hospital, (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, China
| | - Lina Ying
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhenyu Zhang
- Graduate School of Bengbu Medical University, Bengbu, Anhui, China
| | - Liyang Cui
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Ruifang Li
- Center for General Practice Medicine, Department of Gastroenterology, Zhejiang Provincial People’s Hospital, (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, China
| | - Jun Zhang
- The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou, Zhejiang, China
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Jani K. 'Critical circle of fundoplication' - A key concept towards creating identical, replicable and consistent fundoplication wraps. J Minim Access Surg 2023; 19:355-360. [PMID: 36695240 PMCID: PMC10449043 DOI: 10.4103/jmas.jmas_173_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 07/20/2022] [Indexed: 01/22/2023] Open
Abstract
Background There is a significant learning curve associated with laparoscopic Nissen's fundoplication, during which, complications due to surgical errors are more likely to occur. Moreover, length of the wrap, its situation on the lower esophagus and the points of the fundus brought together to create the wrap are arbitrary and as per the surgeon's judgement and estimation. This leads to a lot of variation in the wraps created, not only from surgeon to surgeon, but also from case to case for each individual surgeon. We propose a new concept of 'Critical Circle of Fundoplication' and the new approach to construct the fundoplication based on this concept, by application of which, a mathematically precise fundoplication can be created which is consistent, accurate and optimum. Patients and Methods A total of 132 patients were operated based on the concept of 'Critical Circle of Fundoplication' between 2015 and 2020, of which 116 patients completed one year of follow-up and are included in the paper. Results The demographic characteristics, intraoperative findings and postoperative are described in detail. An additional average time of 10.5 minutes (range: 8-26 minutes) was required in the precise measurements and markings that were required by this approach. Conclusion By application of the concept of 'Critical Circle of Fundoplication', precise, consistent and optimum wraps can be created. By eliminating the errors of structural construction and placement of the wrap, overall results can be improved.
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Affiliation(s)
- Kalpesh Jani
- Department of GI and Laparoscopic Surgery, VIGOS Hospital, Vadodara, Gujarat, India
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Slater BJ, Collings A, Dirks R, Gould JC, Qureshi AP, Juza R, Rodríguez-Luna MR, Wunker C, Kohn GP, Kothari S, Carslon E, Worrell S, Abou-Setta AM, Ansari MT, Athanasiadis DI, Daly S, Dimou F, Haskins IN, Hong J, Krishnan K, Lidor A, Litle V, Low D, Petrick A, Soriano IS, Thosani N, Tyberg A, Velanovich V, Vilallonga R, Marks JM. Multi-society consensus conference and guideline on the treatment of gastroesophageal reflux disease (GERD). Surg Endosc 2023; 37:781-806. [PMID: 36529851 DOI: 10.1007/s00464-022-09817-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 12/02/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND Gastroesophageal reflux disease (GERD) is one of the most common diseases in North America and globally. The aim of this guideline is to provide evidence-based recommendations regarding the most utilized and available endoscopic and surgical treatments for GERD. METHODS Systematic literature reviews were conducted for 4 key questions regarding the surgical and endoscopic treatments for GERD in adults: preoperative evaluation, endoscopic vs surgical or medical treatment, complete vs partial fundoplication, and treatment for obesity (body mass index [BMI] ≥ 35 kg/m2) and concomitant GERD. Evidence-based recommendations were formulated using the GRADE methodology by subject experts. Recommendations for future research were also proposed. RESULTS The consensus provided 13 recommendations. Through the development of these evidence-based recommendations, an algorithm was proposed for aid in the treatment of GERD. Patients with typical symptoms should undergo upper endoscopy, manometry, and pH-testing; additional testing may be required for patients with atypical or extra-esophageal symptoms. Patients with normal or abnormal findings on manometry should consider undergoing partial fundoplication. Magnetic sphincter augmentation or fundoplication are appropriate surgical procedures for adults with GERD. For patients who wish to avoid surgery, the Stretta procedure and transoral incisionless fundoplication (TIF 2.0) were found to have better outcomes than proton pump inhibitors alone. Patients with concomitant obesity were recommended to undergo either gastric bypass or fundoplication, although patients with severe comorbid disease or BMI > 50 should undergo Roux-en-Y gastric bypass for the additional benefits that follow weight loss. CONCLUSION Using the recommendations an algorithm was developed by this panel, so that physicians may better counsel their patients with GERD. There are certain patient factors that have been excluded from included studies/trials, and so these recommendations should not replace surgeon-patient decision making. Engaging in the identified research areas may improve future care for GERD patients.
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Affiliation(s)
- Bethany J Slater
- University of Chicago Medicine, 5841 S. Maryland Avenue, MC 4062, Chicago, IL, USA.
| | - Amelia Collings
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Rebecca Dirks
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Jon C Gould
- Division of Minimally Invasive and Gastrointestinal Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Alia P Qureshi
- Division of General & GI Surgery, Foregut Surgery, Oregon Health & Science University, Portland, OR, USA
| | - Ryan Juza
- Department of Surgery, University of Wisconsin, Madison, WI, USA
| | - María Rita Rodríguez-Luna
- Research Institute Against Digestive Cancer (IRCAD) and ICube Laboratory, Photonics Instrumentation for Health, Strasbourg, France
| | | | - Geoffrey P Kohn
- Department of Surgery, Monash University, Melbourne, VIC, Australia
| | - Shanu Kothari
- Department of Surgery, Prisma Health, Greenville, SC, USA
| | | | | | - Ahmed M Abou-Setta
- Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Mohammed T Ansari
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | | | - Shaun Daly
- Department of Surgery, University of California, Irvine, Orange, CA, USA
| | | | - Ivy N Haskins
- Department of Surgery, University of Nebraska Medical Center, Omaha, USA
| | - Julie Hong
- Department of Surgery, New York Presbyterian/Queens, Queens, USA
| | | | - Anne Lidor
- Department of Surgery, University of Wisconsin, Madison, WI, USA
| | - Virginia Litle
- Section of Thoracic Surgery, Department of Cardiovascular Surgery, Intermountain Healthcare, Salt Lake City, UT, USA
| | - Donald Low
- Virginia Mason Medical Center, Seattle, WA, USA
| | - Anthony Petrick
- Department of General Surgery, Geisinger School of Medicine, Geisinger Medical Center, Danville, PA, USA
| | - Ian S Soriano
- Department of Surgery, University of California San Francisco School of Medicine, San Francisco, CA, USA
| | - Nirav Thosani
- McGovern Medical School, Center for Interventional Gastroenterology at UTHealth, Houston, TX, USA
| | - Amy Tyberg
- Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Vic Velanovich
- Division of Gastrointestinal Surgery, Tampa General, Tampa, FL, USA
| | - Ramon Vilallonga
- Endocrine, Metabolic and Bariatric Unit, General Surgery Department, Vall d'Hebron University Hospital, Center of Excellence for the EAC-BC, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jeffrey M Marks
- Case Western Reserve University School of Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
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Huynh P, Konda V, Sanguansataya S, Ward MA, Leeds SG. Mind the Gap: Current Treatment Alternatives for GERD Patients Failing Medical Treatment and Not Ready for a Fundoplication. Surg Laparosc Endosc Percutan Tech 2020; 31:264-276. [PMID: 33347088 PMCID: PMC8154178 DOI: 10.1097/sle.0000000000000888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/05/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND Gastroesophageal reflux disease is associated with Barrett esophagus, esophageal adenocarcinoma, and significantly impacts quality of life. Medical management is the first line therapy with surgical fundoplication as an alternative therapy. However, a small portion of patients who fail medical therapy are referred for surgical consultation. This creates a "gap" in therapy for those patients dissatisfied with medical therapy but are not getting referred for surgical consultation. Three procedures have been designed to address these patients. These include radiofrequency ablation (RFA) of the lower esophageal sphincter, transoral incisionless fundoplication (TIF), and magnetic sphincter augmentation. MATERIALS AND METHODS A Pubmed literature review was conducted of all publications for RFA, TIF, and MSA. Four most common endpoints for the 3 procedures were compared at different intervals of follow-up. These include percent of patients off proton pump inhibitors (PPIs), GERD-HRQL score, DeMeester score, and percent of time with pH <4. A second query was performed for patients treated with PPI and fundoplications to match the same 4 endpoints as a control. RESULTS Variable freedom from PPI was reported at 1 year for RFA with a weighted mean of 62%, TIF with a weighted mean of 61%, MSA with a weighted mean of 85%, and fundoplications with a weighted mean of 84%. All procedures including PPIs improved quality-of-life scores but were not equal. Fundoplication had the best improvement followed by MSA, TIF, RFA, and PPI, respectively. DeMeester scores are variable after all procedures and PPIs. All MSA studies showed normalization of pH, whereas only 4 of 17 RFA studies and 3 of 11 TIF studies reported normalization of pH. CONCLUSIONS Our literature review compares 3 rival procedures to treat "gap" patients for gastroesophageal reflux disease with 4 common endpoints. Magnetic sphincter augmentation appears to have the most reproducible and linear outcomes but is the most invasive of the 3 procedures. MSA outcomes most closely mirrors that of fundoplication.
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Affiliation(s)
- Phuong Huynh
- Division of Minimally Invasive Surgery, Baylor University Medical Center
- Center for Advanced Surgery, Baylor Scott & White Health
| | - Vani Konda
- Center for Esophageal Diseases, Baylor University Medical Center, Dallas
| | | | - Marc A. Ward
- Division of Minimally Invasive Surgery, Baylor University Medical Center
- Center for Advanced Surgery, Baylor Scott & White Health
- Texas A&M College of Medicine, Bryan, TX
| | - Steven G. Leeds
- Division of Minimally Invasive Surgery, Baylor University Medical Center
- Center for Advanced Surgery, Baylor Scott & White Health
- Texas A&M College of Medicine, Bryan, TX
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Bures C, Benzing C, Marchesini JC, Sobottka WH, Sadowski JA, Marchesini JB, Zorron R. The “Hug” Technique—Roux-en-Y Gastric Bypass with Preservation of the Posterior Wrap in Patients with Previous Nissen Fundoplication: a Simple Solution for a Complex Problem. Obes Surg 2020; 30:4325-4330. [DOI: 10.1007/s11695-020-04793-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 02/05/2023]
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Novel therapies for gastroesophageal reflux disease. Curr Probl Surg 2019; 56:100692. [PMID: 31837718 DOI: 10.1016/j.cpsurg.2019.100692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/07/2019] [Indexed: 12/18/2022]
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Du X, Wu JM, Hu ZW, Wang F, Wang ZG, Zhang C, Yan C, Chen MP. Laparoscopic Nissen (total) versus anterior 180° fundoplication for gastro-esophageal reflux disease: A meta-analysis and systematic review. Medicine (Baltimore) 2017; 96:e8085. [PMID: 28906412 PMCID: PMC5604681 DOI: 10.1097/md.0000000000008085] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Laparoscopic Nissen fundoplication (LNF) has been the gold standard for the surgical management of Gastro-esophageal reflux disease (GERD). Laparoscopic anterior 180° fundoplication (180° LAF) is reported to reduce the incidence of postoperative complications while obtaining similar control of reflux. The present meta-analysis was conducted to confirm the value of the 2 techniques. METHODS PubMed, Medline, Embase, Cochrane Library, Springerlink, and China National Knowledge Infrastructure Platform databases were searched for randomized controlled trials (RCTs) comparing LNF and 180° LAF. Data regarding the benefits and adverse results of 2 techniques were extracted and compared using a meta-analysis. RESULTS Six eligible RCTs comparing LNF (n = 266) and 180° LAF (n = 265) were identified. There were no significant differences between LNF and 180° LAF with regard to operating time, perioperative complications, length of hospital stay, patient satisfaction, willingness to undergo surgery again, quality of life, postoperative heartburn, proton pump inhibitor (PPI) use, postoperative DeMeester scores, postoperative lower esophageal sphincter (LES) pressure, postoperative gas-bloating, unable to belch, diarrhea, or overall reoperation. LNF was associated with a higher prevalence of postoperative dysphagia compared with 180° LAF, while 180° LAF was followed by more reoperation for recurrent reflux symptoms. CONCLUSION LNF and 180° LAF are equally effective in controlling reflux symptoms and obtain a comparable prevalence of patient satisfaction. 180° LAF can reduce the incidence of postoperative dysphagia while this is offset by a higher risk of reoperation for recurrent symptoms. The risk of recurrent symptoms should need to be balanced against the risk of dysphagia when surgeons choose surgical procedures for each individual with GERD.
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Affiliation(s)
- Xing Du
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University
| | - Ji-Min Wu
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital
| | - Zhi-Wei Hu
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital
| | - Feng Wang
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital
| | - Zhong-Gao Wang
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University
| | - Chao Zhang
- Department of General Surgery, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Chao Yan
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University
| | - Mei-Ping Chen
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital
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Systematic review and meta-analysis of controlled and prospective cohort efficacy studies of endoscopic radiofrequency for treatment of gastroesophageal reflux disease. Surg Endosc 2017; 31:4865-4882. [PMID: 28233093 DOI: 10.1007/s00464-017-5431-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 01/20/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND The endoscopic radiofrequency procedure (Stretta) has been used for more than a decade to treat patients with gastroesophageal reflux disease (GERD). However, the efficacy of the procedure in improving objective and subjective clinical endpoints needs to be further established. AIM To determine the efficacy of the Stretta procedure in treating patients with GERD, using a systematic review and meta-analysis of controlled and cohort studies. METHODS We conducted a systematic search of the PubMed and Cochrane databases for English language clinical studies of the Stretta procedure, published from inception until May 2016. Randomized controlled trials (RCTs) and cohort studies that included the use of the Stretta procedure in GERD patients were included. A generalized inverse weighting was used for all outcomes. Results were calculated by both fixed effects and random effects model. RESULTS Twenty-eight studies (4 RCTs, 23 cohort studies, and 1 registry) representing 2468 unique Stretta patients were included in the meta-analysis. The (unweighted) mean follow-up time for the 28 studies was 25.4 [14.0, 36.7] months. The pooled results showed that the Stretta reduced (improved) the health-related quality of life score by -14.6 [-16.48, -12.73] (P < 0.001). Stretta also reduced (improved) the pooled heartburn standardized score by -1.53 [-1.97, -1.09] (P < 0.001). After Stretta treatment, only 49% of the patients using proton pump inhibitors (PPIs) at baseline required PPIs at follow-up (P < 0.001). The Stretta treatment reduced the incidence of erosive esophagitis by 24% (P < 0.001) and reduced esophageal acid exposure by a mean of -3.01 [-3.72, -2.30] (P < 0.001). Lower esophageal sphincter (LES) basal pressure was increased post Stretta therapy by a mean of 1.73 [-0.29, 3.74] mmHg (P = NS). CONCLUSIONS The Stretta procedure significantly improves subjective and objective clinical endpoints, except LES basal pressure, and therefore should be considered as a viable alternative in managing GERD.
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Hu Z, Chen M, Wu J, Song Q, Yan C, Du X, Wang Z. Improved control of hypertension following laparoscopic fundoplication for gastroesophageal reflux disease. Front Med 2017; 11:68-73. [PMID: 28213877 DOI: 10.1007/s11684-016-0490-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 09/01/2016] [Indexed: 01/05/2023]
Abstract
This study aims to determine whether successful laparoscopic fundoplication for gastroesophageal reflux disease (GERD) can improve the control of hypertension. We conducted an observational study of GERD patients with hypertension. The esophageal and gastroesophageal symptoms of these patients were successfully treated with laparoscopic fundoplication, as measured by the reduced GERD symptoms and proton pump inhibitor consumption. A hypertension control scale was used to classify the use of antihypertensive medications and the quality of blood pressure control before and after anti-reflux surgery.Wilcoxon signed-ranks test was used for the statistical analyses. Seventy GERD patients were included in the analysis and followed up for a mean period of 3.5 ± 1.4 years. Prior to surgery, all participating patients were taking at least one class of antihypertensive medication, and 56 patients (80%) had intermittently high blood pressure. After surgery, the mean number of antihypertensive medication classes per patient was significantly reduced from 1.61 ± 0.77 pre-procedure to 1.27 ± 0.88 post-procedure (P < 0.001). The blood pressure of 48 of the 56 cases (86%) with preoperative intermittent high blood pressure returned to normal post procedure. A total of 50 patients (71%) recorded improvements on the hypertension control scale, with the overall mean score decreasing from 3.1 ± 1.0 preprocedure to 1.4 ± 1.0 post-procedure (P < 0.001). Therefore, successful laparoscopic fundoplication may result in better blood pressure control in some hypertensive GERD patients. This result suggests a possible connection between gastroesophageal reflux and hypertension.
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Affiliation(s)
- Zhiwei Hu
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital, Beijing, 100088, China
| | - Meiping Chen
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital, Beijing, 100088, China
| | - Jimin Wu
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital, Beijing, 100088, China
| | - Qing Song
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital, Beijing, 100088, China
| | - Chao Yan
- Department of Vascular Surgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Xing Du
- Department of Vascular Surgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zhonggao Wang
- Department of Gastroesophageal Reflux Disease, PLA Rocket Force General Hospital, Beijing, 100088, China. .,Department of Vascular Surgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
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12
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Nabi Z, Reddy DN. Endoscopic Management of Gastroesophageal Reflux Disease: Revisited. Clin Endosc 2016; 49:408-416. [PMID: 27744659 PMCID: PMC5066398 DOI: 10.5946/ce.2016.133] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 09/19/2016] [Accepted: 09/19/2016] [Indexed: 12/13/2022] Open
Abstract
Gastroesophageal reflux disease (GERD) is defined by the presence of troublesome symptoms resulting from the reflux of gastric contents. The prevalence of GERD is increasing globally. An incompetent lower esophageal sphincter underlies the pathogenesis of GERD. Proton pump inhibitors (PPIs) form the core of GERD management. However, a substantial number of patients do not respond well to PPIs. The next option is anti-reflux surgery, which is efficacious, but it has its own limitations, such as gas bloating, inability to belch or vomit, and dysphagia. Laparoscopic placement of magnetic augmentation device is emerging as a useful alternative to conventional anti-reflux surgery. However, invasiveness of a surgical procedure remains a concern for the patients. The proportion of PPI non-responders or partial responders who do not wish for anti-reflux surgery defines the ‘treatment gap’ and needs to be addressed. The last decade has witnessed the fall and rise of many endoscopic devices for GERD. Major endoscopic strategies include radiofrequency ablation and endoscopic fundoplication devices. Current endoscopic devices score high on subjective improvement, but have been unimpressive in objective improvement like esophageal acid exposure. In this review, we discuss the current endoscopic anti-reflux therapies and available evidence for their role in the management of GERD.
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Affiliation(s)
- Zaheer Nabi
- Asian Institute of Gastroenterology, Hyderabad, India
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Emilsson ÖI, Benediktsdóttir B, Ólafsson Í, Cook E, Júlíusson S, Björnsson ES, Guðlaugsdóttir S, Guðmundsdóttir AS, Mirgorodskaya E, Ljungström E, Arnardóttir ES, Gíslason Þ, Janson C, Olin AC. Respiratory symptoms, sleep-disordered breathing and biomarkers in nocturnal gastroesophageal reflux. Respir Res 2016; 17:115. [PMID: 27646537 PMCID: PMC5029098 DOI: 10.1186/s12931-016-0431-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 09/12/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Nocturnal gastroesophageal reflux (nGER) is associated with respiratory symptoms and sleep-disordered breathing (SDB), but the pathogenesis is unclear. We aimed to investigate the association between nGER and respiratory symptoms, exacerbations of respiratory symptoms, SDB and airway inflammation. METHODS Participants in the European Community Respiratory Health Survey III in Iceland with nGER symptoms (n = 48) and age and gender matched controls (n = 42) were studied by questionnaires, exhaled breath condensate (EBC), particles in exhaled air (PEx) measurements, and a home polygraphic study. An exacerbation of respiratory symptoms was defined as an episode of markedly worse respiratory symptoms in the previous 12 months. RESULTS Asthma and bronchitis symptoms were more common among nGER subjects than controls (54 % vs 29 %, p = 0.01; and 60 % vs 26 %, p < 0.01, respectively), as were exacerbations of respiratory symptoms (19 % vs 5 %, p = 0.04). Objectively measured snoring was more common among subjects with nGER than controls (snores per hour of sleep, median (IQR): 177 (79-281) vs 67 (32-182), p = 0.004). Pepsin (2.5 ng/ml (0.8-5.8) vs 0.8 ng/ml (0.8-3.6), p = 0.03), substance P (741 pg/ml (626-821) vs 623 pg/ml (562-676), p < 0.001) and 8-isoprostane (3.0 pg/ml (2.7-3.9) vs 2.6 pg/ml (2.2-2.9), p = 0.002) in EBC were higher among nGER subjects than controls. Albumin and surfactant protein A in PEx were lower among nGER subjects. These findings were independent of BMI. CONCLUSION In a general population sample, nGER is associated with symptoms of asthma and bronchitis, as well as exacerbations of respiratory symptoms. Also, nGER is associated with increased respiratory effort during sleep. Biomarker measurements in EBC, PEx and serum indicate that micro-aspiration and neurogenic inflammation are plausible mechanisms.
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Affiliation(s)
- Össur Ingi Emilsson
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
- Department of Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Bryndís Benediktsdóttir
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | - Ísleifur Ólafsson
- Department of Clinical Biochemistry, Landspitali University Hospital, Reykjavik, Iceland
| | - Elizabeth Cook
- Department of Clinical Biochemistry, Landspitali University Hospital, Reykjavik, Iceland
| | - Sigurður Júlíusson
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Otolaryngology, Landspitali University Hospital, Reykjavik, Iceland
| | - Einar Stefán Björnsson
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Gastroenterology, Landspitali University Hospital, Reykjavik, Iceland
| | - Sunna Guðlaugsdóttir
- Department of Gastroenterology, Landspitali University Hospital, Reykjavik, Iceland
| | | | - Ekaterina Mirgorodskaya
- Department of Occupational and Environmental Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Evert Ljungström
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden
| | - Erna Sif Arnardóttir
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | - Þórarinn Gíslason
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
| | - Christer Janson
- Department of Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Anna-Carin Olin
- Department of Occupational and Environmental Medicine, University of Gothenburg, Gothenburg, Sweden
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Lee JH, Park JM, Han SU, Kim JJ, Song KY, Ryu SW, Seo KW, Kim HI, Kim W. Antireflux Surgery in Korea: A Nationwide Study from 2011 to 2014. Gut Liver 2016; 10:726-30. [PMID: 27114420 PMCID: PMC5003195 DOI: 10.5009/gnl15406] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/16/2015] [Accepted: 11/16/2015] [Indexed: 12/11/2022] Open
Abstract
Background/Aims Although laparoscopic fundoplication is a well-established therapy for gastroesophageal reflux disease (GERD) in Western countries, the mainstay of GERD treatment in Korea is long-term proton pump inhibitor (PPI) use. The aim of the present study was to evaluate nationwide data regarding antireflux surgery in Korea. Methods Data from 2011 to 2014 were collected from the Korean Antireflux Surgery Study Group and then analyzed. Results A total of 87 patients underwent laparoscopic fundoplication for the treatment of GERD. Preoperatively, typical symptoms were present in 81 patients (93%) and atypical symptoms were present in 51 patients (59%). Twenty-seven patients (31%) had poor PPI responses. The average surgical time and postoperative hospital stay were 116.3±42.3 minutes and 4.3±3.1 days, respectively. At 3 months after surgery, typical symptoms were completely controlled in 86.3% of patients and partially controlled in 11.7%, whereas atypical symptoms were completely controlled in 63.3% of patients and partially controlled in 23.3%. Conclusions This study showed that although atypical symptoms and PPI nonresponders are common, the complete control rates of typical and atypical symptoms were 86.3% and 63.3%, respectively. Laparoscopic fundoplication is an efficacious method of controlling the symptoms of GERD and has an acceptable rate of postoperative morbidity and adverse symptoms.
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Affiliation(s)
- Jun-Hyun Lee
- Department of Surgery, The Catholic University of Korea College of Medicine, Korea
| | - Joong-Min Park
- Department of Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Sang-Uk Han
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
| | - Jin-Jo Kim
- Department of Surgery, The Catholic University of Korea College of Medicine, Korea
| | - Kyo Young Song
- Department of Surgery, The Catholic University of Korea College of Medicine, Korea
| | - Seung Wan Ryu
- Department of Surgery, Keimyung University School of Medicine, Daegu, Korea
| | - Kyung Won Seo
- Department of Surgery, Kosin University College of Medicine, Busan, Korea
| | - Hyoung-Il Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Wook Kim
- Department of Surgery, The Catholic University of Korea College of Medicine, Korea
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Zhang C, Wu J, Hu Z, Yan C, Gao X, Liang W, Liu D, Li F, Wang Z. Diagnosis and Anti-Reflux Therapy for GERD with Respiratory Symptoms: A Study Using Multichannel Intraluminal Impedance-pH Monitoring. PLoS One 2016; 11:e0160139. [PMID: 27532103 PMCID: PMC4988652 DOI: 10.1371/journal.pone.0160139] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 07/14/2016] [Indexed: 12/15/2022] Open
Abstract
Background/Aims Respiratory symptoms are often associated with gastroesophageal reflux disease (GERD). Although the role of multichannel intraluminal impedance–pH (MII-pH) monitoring in GERD is clear, little is known regarding the characteristics of patients with respiratory symptoms based on MII-pH monitoring and anti-reflux therapy. We evaluated a cohort of GERD patients to identify the MII-pH parameters of GERD-related respiratory symptoms and to assess the anti-reflux therapy outcomes. Methods We undertook a prospective study of patients who were referred for GERD evaluation from January 2011 to January 2012. One hundred ninety-five patients underwent MII-pH monitoring and esophageal manometry, and one hundred sixty-five patients underwent invasive anti-reflux therapy that included laparoscopic Toupet fundoplication (LTF) and the Stretta procedure. The patient characteristics and MII-pH parameters were analyzed, and the symptom scores were assessed at baseline and at 1- and 3-year follow-up evaluations. Results Of the 195 patients, 96 (49.2%) exhibited respiratory symptoms and significantly more reflux episodes (70.7±29.3) than patients without respiratory symptoms (64.7±24.4, p = 0.044) based on the MII-pH monitoring results. Moreover, the group of patients with respiratory symptoms exhibited more proximal reflux episodes (35.2±21.3) than the non-respiratory symptomatic group (28.3±17.9, p = 0.013). One hundred twenty-five patients following the Stretta procedure (n = 60, 31 with respiratory symptoms) or LTF (n = 65, 35 with respiratory symptoms) completed the designated 3-year follow-up period and were included in the final analysis. The symptom scores after anti-reflux therapy all decreased relative to the corresponding baseline values (p<0.05), and there were no significant differences in the control of respiration between the Stretta procedure and LTF (p>0.05). However, LTF significantly reduced the recurrence (re-operation) rate compared with the Stretta procedure (0 vs. 19.4%, p = 0.006). Conclusions MII-pH monitoring effectively detected respiratory-related predictive parameters, including total/proximal reflux episodes and symptom correlations. We found that GERD patients with respiratory symptoms exhibited more proximal and total reflux episodes but not more acid-related episodes, as determined by MII-pH monitoring. Thus, such monitoring could be useful for diagnosing atypical GERD patients with respiratory symptoms. Furthermore, LTF exhibited a more significant effect on controlling typical symptoms in all GERD patients and reducing the recurrence rate than the Stretta procedure in patients with respiratory symptoms.
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Affiliation(s)
- Chao Zhang
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
- Department of Gastroesophageal Reflux Disease, Second Artillery General Hospital of Chinese People’s Liberation Army, No.16 Xinjiekou Street, Xicheng District, Beijing, 100088, China
| | - Jimin Wu
- Department of Gastroesophageal Reflux Disease, Second Artillery General Hospital of Chinese People’s Liberation Army, No.16 Xinjiekou Street, Xicheng District, Beijing, 100088, China
| | - Zhiwei Hu
- Department of Gastroesophageal Reflux Disease, Second Artillery General Hospital of Chinese People’s Liberation Army, No.16 Xinjiekou Street, Xicheng District, Beijing, 100088, China
| | - Chao Yan
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
| | - Xiang Gao
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
| | - Weitao Liang
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
| | - Diangang Liu
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
| | - Fei Li
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
- * E-mail: (ZW); (FL)
| | - Zhonggao Wang
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China
- Department of Gastroesophageal Reflux Disease, Second Artillery General Hospital of Chinese People’s Liberation Army, No.16 Xinjiekou Street, Xicheng District, Beijing, 100088, China
- * E-mail: (ZW); (FL)
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Du X, Hu Z, Yan C, Zhang C, Wang Z, Wu J. A meta-analysis of long follow-up outcomes of laparoscopic Nissen (total) versus Toupet (270°) fundoplication for gastro-esophageal reflux disease based on randomized controlled trials in adults. BMC Gastroenterol 2016; 16:88. [PMID: 27484006 PMCID: PMC4969978 DOI: 10.1186/s12876-016-0502-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 07/26/2016] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Laparoscopic Nissen fundoplication (LNF) is the most common surgical procedure for the surgical management of gastro-esophageal reflux disease (GERD). Laparoscopic Toupet fundoplication (LTF) has been reported to have a lower prevalence of postoperative complications yet still obtain a similar level of reflux control. We conducted a meta-analysis to confirm the value of LNF and LTF. METHODS PubMed, Medline, Embase, Cochrane Library and Springerlink were searched for randomized controlled trials (RCTs) comparing LNF and LTF. Data regarding the benefits and adverse results of two techniques were extracted and compared using a meta-analysis. RESULTS Eight eligible RCTs comparing LNF (n = 625) and LTF (n = 567) were identified. There were no significant differences between LNF and LTF with regard to hospitalization duration, perioperative complications, patient satisfaction, postoperative heartburn, regurgitation, postoperative DeMeester scores, or esophagites. A shorter operative time and higher postoperative lower esophageal sphincter pressure were associated with LNF. Prevalence of postoperative dysphagia, gas-bloating, inability to belch, dilatation for dysphagia and reoperation were higher after LNF, but subgroup analyses showed that differences with respect to dysphagia between LNF and LTF disappeared over time. Subgroup analyses did not support "tailored therapy" according to preoperative esophageal motility. CONCLUSIONS LNF and LTF have equivalently good control of GERD and result in a similar prevalence of patient satisfaction. Based on current evidence, it is not rational or advisable to abandon LNF when choosing a surgical procedure for GERD.
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Affiliation(s)
- Xing Du
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zhiwei Hu
- Department of Gastroesophageal Reflux Disease, the General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Chao Yan
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University, Beijing, 100053, China
| | - Chao Zhang
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zhonggao Wang
- Department of Vascular Surgery, Xuan Wu Hospital, Capital Medical University, Beijing, 100053, China.
- Department of Gastroesophageal Reflux Disease, the General Hospital of the PLA Rocket Force, Beijing, 100088, China.
| | - Jimin Wu
- Department of Gastroesophageal Reflux Disease, the General Hospital of the PLA Rocket Force, Beijing, 100088, China
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Is the Stretta procedure as effective as the best medical and surgical treatments for gastro-oesophageal reflux disease? A best evidence topic. Int J Surg 2016; 30:19-24. [DOI: 10.1016/j.ijsu.2016.03.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 03/18/2016] [Accepted: 03/23/2016] [Indexed: 12/12/2022]
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