1
|
Bhat P, Kaffes AJ, Lassen K, Aabakken L. Upper gastrointestinal endoscopy in the surgically altered patient. Dig Endosc 2024; 36:1077-1093. [PMID: 38952202 DOI: 10.1111/den.14823] [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: 11/11/2023] [Accepted: 04/23/2024] [Indexed: 07/03/2024]
Abstract
As management of upper gastrointestinal malignancies improves, and with popularization of bariatric surgery, endoscopists are likely to meet patients with altered upper gastrointestinal anatomy. Short-term, the surgery can cause complications like bleeding, leaks, and fistulas, and longer-term problems such as intestinal or biliary anastomotic strictures or biliary stones can arise, all necessitating endoscopy. In addition, the usual upper gastrointestinal pathologies can also still occur. These patients pose unique challenges. To proceed, understanding the new layout of the upper gastrointestinal tract is essential. The endoscopist, armed with a clear plan for navigation, can readily diagnose and manage most commonly occurring conditions, such as marginal ulcers and proximal anastomotic strictures with standard endoscopic instruments. With complex reconstructions involving long segments of small bowel, such as Roux-en-Y gastric bypass, utilization of balloon-assisted enteroscopy may be necessary, mandating modification of procedures such as endoscopic retrograde cholangiopancreatography. Successful endoscopic management of patients with altered anatomy will require prior planning and preparation to ensure the appropriate equipment, setting, and skill set is provided.
Collapse
Affiliation(s)
- Purnima Bhat
- Gastroenterology and Hepatology Unit, Canberra Hospital, Canberra, Australia
- College of Health and Medicine, Australian National University, Canberra, Australia
| | - Arthur John Kaffes
- Interventional Endoscopy, Chris O'Brien Lifehouse, Sydney, Australia
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, Australia
- Department of Medicine, University of Sydney, Sydney, Australia
| | - Kristoffer Lassen
- Department of HPB Surgery, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Lars Aabakken
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
| |
Collapse
|
2
|
Salvador R, Pandolfino JE, Costantini M, Gyawali CP, Keller J, Mittal S, Roman S, Savarino EV, Tatum R, Tolone S, Zerbib F, Capovilla G, Jain A, Kathpalia P, Provenzano L, Yadlapati R. The Role of High-Resolution Manometry Prior to and Following Antireflux Surgery: The Padova Consensus. Ann Surg 2024:00000658-990000000-00840. [PMID: 38606560 PMCID: PMC11470131 DOI: 10.1097/sla.0000000000006297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
BACKGROUND In the last two decades the development of high-resolution manometry (HRM) has changed and revolutionized the diagnostic assessment of patients complain foregut symptoms. The role of HRM before and after antireflux procedure remains unclear, especially in surgical practice, where a clear understanding of esophageal physiology and hiatus anatomy is essential for optimal outcome of antireflux surgery (ARS). Surgeons and gastroenterologists (GIs) agree that assessing patients following antireflux procedures can be challenging. Although endoscopy and barium-swallow can reveal anatomic abnormalities, physiologic information on HRM allowing insight into the cause of eventually recurrent symptoms could be key to clinical decision making. METHOD A multi-disciplinary international working group (14 surgeons and 15 GIs) collaborated to develop consensus on the role of HRM pre- and post- ARS, and to develop a postoperative classification to interpret HRM findings. The method utilized was detailed literature review to develop statements, and the RAND/University of California, Los Angeles Appropriateness Methodology (RAM) to assess agreement with the statements. Only statements with an approval rate >80% or a final ranking with a median score of 7 were accepted in the consensus. The working groups evaluated the role of HRM prior to ARS and the role of HRM following ARS. CONCLUSION This international initiative developed by surgeons and GIs together, summarizes the state of our knowledge of the use of HRM pre- and post-ARS. The Padova Classification was developed to facilitate the interpretation of HRM studies of patients underwent ARS.
Collapse
Affiliation(s)
- Renato Salvador
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, School of Medicine, Padova, Italy
| | | | - Mario Costantini
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, School of Medicine, Padova, Italy
| | - C Prakash Gyawali
- Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO, USA
| | - Jutta Keller
- Israelitic Hospital, Academic Hospital University of Hamburg, Orchideenstieg 14, 22297 Hamburg, Germany
| | - Sumeet Mittal
- Foregut Program, Norton Thoracic Institute, Phoenix, AZ, USA
| | - Sabine Roman
- Division of Gastroenterology, Lyon University and Hospices Civils de Lyon, Lyon, France
| | - Edoardo Vincenzo Savarino
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, School of Medicine, Padova, Italy
| | - Roger Tatum
- Department of Surgery, University of Washington and VA Puget Sound Health Care System, Seattle, WA, USA
| | - Salvatore Tolone
- Medicine & Surgery, Universita degli Studi della Campania, School of Medicine Naples, Italy
| | - Frank Zerbib
- CHU de Bordeaux, Centre Medico-chirurgical Magellan, Hôpital Haut-Lévêque, Gastroenterology department; Université de Bordeaux; INSERM CIC 1401; Bordeaux, France
| | - Giovanni Capovilla
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, School of Medicine, Padova, Italy
| | - Anand Jain
- Division of Gastroenterology, Emory University, Atlanta, GA, USA
| | - Priya Kathpalia
- Division of Gastroenterology, University of California San Francisco, San Francisco, CA USA
| | - Luca Provenzano
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, School of Medicine, Padova, Italy
| | - Rena Yadlapati
- Division of Gastroenterology, University of California San Diego, La Jolla, CA USA
| |
Collapse
|
3
|
Habeeb TA, Hussain A, Podda M, Aiolfi A, Kryvoruchko IA, Kalmoush AE, Labib MF, Mustafa FM, Elbelkasi H, Hamdy A, Abo Alsaad MI, Sallam AM, Zaitoun MA, Negm M, Mostafa A, Abdou Yassin M, Elshahidy TM, Abdelmonem Elsayed A, Mansour MI, Elaidy MM, Moursi AM, Yehia AM, Ashour H, Metwalli AEM, Abdelhady WA, Abdelghani AA, AbdAllah ES, Ramadan A, Rushdy T. Intraoperative endomanometric laparoscopic Nissen fundoplication improves postoperative outcomes in large sliding hiatus hernias with severe gastroesophageal reflux disease: a retrospective cohort study. Int J Surg 2023; 109:3312-3321. [PMID: 37566907 PMCID: PMC10651251 DOI: 10.1097/js9.0000000000000659] [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: 05/12/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023]
Abstract
BACKGROUND Laparoscopic Nissen fundoplication (LNF) is the gold standard surgical intervention for gastroesophageal reflux disease (GERD). LNF can be followed by recurrent symptoms or complications affecting patient satisfaction. The aim of this study is to assess the value of the intraoperative endomanometric evaluation of esophagogastric competence and pressure combined with LNF in patients with large sliding hiatus hernia (>5 cm) with severe GERD (DeMeester score >100). MATERIALS AND METHODS This is a retrospective, multicenter cohort study. Baseline characteristics, postoperative dysphagia and gas bloat syndrome, recurrent symptoms, and satisfaction were collected from a prospectively maintained database. Outcomes analyzed included recurrent reflux symptoms, postoperative side effects, and satisfaction with surgery. RESULTS Three hundred sixty patients were stratified into endomanometric LNF (180 patients, LNF+) and LNF alone (180 patients, LNF). Recurrent heartburn (3.9 vs. 8.3%) and recurrent regurgitation (2.2 vs. 5%) showed a lower incidence in the LNF+ group ( P =0.012). Postoperative score III recurrent heartburn and score III regurgitations occurred in 0 vs. 3.3% and 0 vs. 2.8% cases in the LNF+ and LNF groups, respectively ( P =0.005). Postoperative persistent dysphagia and gas bloat syndrome occurred in 1.75 vs. 5.6% and 0 vs. 3.9% of patients ( P =0.001). Score III postoperative persistent dysphagia was 0 vs. 2.8% in the two groups ( P =0.007). There was no redo surgery for dysphagia after LNF+. Patient satisfaction at the end of the study was 93.3 vs. 86.7% in both cohorts, respectively ( P =0.05). CONCLUSIONS Intraoperative high-resolution manometry and endoscopic were feasible in all patients, and the outcomes were favorable from an effectiveness and safety standpoint.
Collapse
Affiliation(s)
- Tamer A.A.M. Habeeb
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Mauro Podda
- Department of Surgical Science, University of Cagliari, Cagliari, Italy
| | - Alberto Aiolfi
- Division of General Surgery, Department of Biomedical Science for Health, I.R.C.C.S. Ospedale Galeazzi-Sant’Ambrogio, University of Milan, Milan, Italy
| | | | | | - Mohamed F. Labib
- General Surgery Department, Faculty of Medicine, Al-Azher University, Egypt
| | - Fawzy M. Mustafa
- General Surgery Department, Faculty of Medicine, Al-Azher University, Egypt
| | - Hamdi Elbelkasi
- General Surgery Department, Mataryia Teaching Hospital, Egypt
| | - Ahmed Hamdy
- Department of Hepato-Bilio-Pancreatic (HBP) Surgery, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt
| | | | - Ahmed M. Sallam
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed A. Zaitoun
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed Negm
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Abdelshafy Mostafa
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mahmoud Abdou Yassin
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Tamer M. Elshahidy
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Mohamed I. Mansour
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mostafa M. Elaidy
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Adel Mahmoud Moursi
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed M. Yehia
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Hassan Ashour
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Waleed A. Abdelhady
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Amr. A. Abdelghani
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ehab S. AbdAllah
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Alaaedin Ramadan
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Tamer Rushdy
- Department of General Surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| |
Collapse
|
4
|
Lata T, Trautman J, Townend P, Wilson RB. Current management of gastro-oesophageal reflux disease-treatment costs, safety profile, and effectiveness: a narrative review. Gastroenterol Rep (Oxf) 2023; 11:goad008. [PMID: 37082451 PMCID: PMC10112961 DOI: 10.1093/gastro/goad008] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 12/09/2022] [Accepted: 02/01/2023] [Indexed: 04/22/2023] Open
Abstract
Background The purpose of this study was to review the current management of gastro-oesophageal reflux disease (GORD), including treatment costs, safety profile and effectiveness. Methods A literature review was performed of randomized-controlled trials, systematic reviews, Cochrane reports and National/Societal guidelines of the medical, endoscopic and surgical management of GORD. Proton pump inhibitor (PPI) prescribing patterns and expenditure were reviewed in different countries, including Australia, Canada, New Zealand, UK and USA. Results Proton pump inhibitors (PPIs) are primarily indicated for control of GORD, Helicobacter pylori eradication (combined with antibiotics), preventing NSAID-induced gastrointestinal bleeding and treating peptic ulcer disease. There is widespread overprescribing of PPIs in Western and Eastern nations in terms of indication and duration, with substantial expense for national health providers. Despite a favourable short-term safety profile, there are observational associations of adverse effects with long-term PPIs. These include nutrient malabsorption, enteric infections and cardiovascular events. The prevalence of PPI use makes their long-term safety profile clinically relevant. Cost-benefit, symptom control and quality-of-life outcomes favour laparoscopic fundoplication rather than chronic PPI treatment. Laparoscopic fundoplication in long-term management of PPI-responsive GORD is supported by SAGES, NICE and ACG, and PPI-refractory GORD by AGA and SAGES guidelines. The importance of establishing a definitive diagnosis prior to invasive management is emphasized, especially in PPI-refractory heartburn. Conclusions We examined evidence-based guidelines for PPI prescribing and deprescribing in primary care and hospital settings and the need for PPI stewardship and education of health professionals. This narrative review presents the advantages and disadvantages of surgical, endoscopic and medical management of GORD, which may assist in shared decision making and treatment choice in individual patients.This paper was presented (GS020) at the 88th RACS Annual Scientific Conference, 6-10 May, 2019.
Collapse
Affiliation(s)
- Tahmina Lata
- Corresponding author. Faculty of Medicine and Health, University of Sydney, City Road, Camperdown, NSW 2006, Australia. Tel: +0061-2-93512222.
| | - Jodie Trautman
- General Surgery Department, Wollongong Hospital, Wollongong, NSW, Australia
| | - Philip Townend
- General Surgery Department, Gold Coast University Hospital, Southport, QLD, Australia
| | | |
Collapse
|
5
|
Pascotto B, Henrard A, Maillart JF, Arenas-Sanchez M, Postal A, Legrand M. Quality of life and gastric acid-suppression medication post-laparoscopic fundoplication: a ten years retrospective study. Acta Chir Belg 2022; 122:321-327. [PMID: 33534655 DOI: 10.1080/00015458.2020.1860551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Background: Although medical treatment is the best approach for treating gastroesophageal reflux disease (GERD), surgery has a significant role to play not only in cases of failure of medical treatment but also as in a long-term approach, specifically in young patient. On the other hand, alarming reports have been published concerning the outcomes and usefulness of antireflux surgery (ARS). The aim of this study was to evaluate medium and long-term functional outcomes following ARS performed in our institution over a 10 year period.Methods: This was a retrospective review of patients in our department who underwent primary or redo laparoscopic fundoplication between 2005 and 2015. Evaluation of the outcomes was made using a validated questionnaire specifically dedicated to GERD (the Gastroesophageal Reflux Disease - Health-Related Quality of Life (GERD-HRQL) questionnaire) and by investigation about the continued use of proton-pump inhibitors (PPIs). Exclusion criteria were patients treated for GERD with Roux-en-Y gastric bypass, emergency reduction of hiatal hernia, patients missing from follow-up and patients deceased from unrelated causes.Results: 296 patients out of 309 met the inclusion criteria. Primary procedures included 214 Nissen, 35 Toupet, and 23 Collis gastroplasty; there were additionally 62 redo operations. Neither postoperative mortality nor conversion was observed. The mean follow-up was 8 years post-surgery, and contact was made with 96% of the original group. 85% of the patients had stopped PPI use since their operation (86% after Nissen, 73% after Toupet, 94% after Collis and 82% after redos). 90% of the patients had good to excellent functional results as reported by their GERD-HRQL score, and independent of the type of previous procedure. 31 patients were dissatisfied due to dysphagia in 7 and GERD recurrence in 24. Again 75% were extremely satisfied and 15% satisfied. Our own incidence of redo procedures was 11% but the functional result and satisfaction index were comparable between redo and primary procedures. The addition of Collis gastroplasty in cases of real short oesophagus did not alter the final result.Conclusions: Laparoscopic ARS presents a superior alternative to lifetime medication use and can provide long-term control of GERD symptoms in the majority of patients if it is performed skillfully and in carefully evaluated patients. Based on the present study, we believed that significant improvement in GERD health-related quality of life can be attained following both primary and reoperative ARS.
Collapse
Affiliation(s)
- Beniamino Pascotto
- Digestive Surgery Department, Regional Hospital Centre of Huy, Huy, Belgium
| | - Alexandre Henrard
- Digestive Surgery Department, Regional Hospital Centre of Huy, Huy, Belgium
| | | | | | - Alain Postal
- Digestive Surgery Department, Regional Hospital Centre of Huy, Huy, Belgium
| | - Marc Legrand
- Digestive Surgery Department, Regional Hospital Centre of Huy, Huy, Belgium
| |
Collapse
|
6
|
Crural closure, not fundoplication, results in a significant decrease in lower esophageal sphincter distensibility. Surg Endosc 2022; 36:3893-3901. [PMID: 34463870 DOI: 10.1007/s00464-021-08706-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 08/23/2021] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The esophagogastric junction (EGJ) is a complex anti-reflux barrier whose integrity relies on both the intrinsic lower esophageal sphincter (LES) and extrinsic crural diaphragm. During hiatal hernia repair, it is unclear whether the crural closure or the fundoplication is more important to restore the anti-reflux barrier. The objective of this study is to analyze changes in LES minimum diameter (Dmin) and distensibility index (DI) using the endoluminal functional lumen imaging probe (FLIP) during hiatal hernia repair. METHODS Following implementation of a standardized operative FLIP protocol, all data were collected prospectively and entered into a quality database. This data were reviewed retrospectively for all patients undergoing hiatal hernia repair. FLIP measurements were collected prior to hernia dissection, after hernia reduction, after cruroplasty, and after fundoplication. Additionally, subjective assessment of the tightness of crural closure was rated by the primary surgeon on a scale of 1 to 5, 1 being the loosest and 5 being the tightest. RESULTS Between August 2018 and February 2020, 97 hiatal hernia repairs were performed by a single surgeon. FLIP measurements collected using a 40-mL volume fill without pneumoperitoneum demonstrated a significant decrease in LES Dmin (13.84 ± 2.59 to 10.27 ± 2.09) and DI (6.81 ± 3.03 to 2.85 ± 1.23 mm2/mmHg) after crural closure (both p < 0.0001). Following fundoplication, there was a small, but also statistically significant, increase in both Dmin and DI (both p < 0.0001). Additionally, subjective assessment of crural tightness after cruroplasty correlated well with DI (r = - 0.466, p < 0.001) and all patients with a crural tightness rating ≥ 4.5 (N = 13) had a DI < 2.0 mm2/mmHg. CONCLUSION Cruroplasty results in a significant decrease in LES distensibility and may be more important than fundoplication in restoring EGJ competency. Additionally, subjective estimation of crural tightness correlates well with objective FLIP evaluation, suggesting surgeon assessment of cruroplasty is reliable.
Collapse
|
7
|
Fanous M, Wei W. The Outcomes of Performing Partial Fundoplication Based on Endoflip Versus Manometric Findings. Am Surg 2021; 88:908-914. [PMID: 34794325 DOI: 10.1177/00031348211054565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The surgical management of gastroesophageal reflux disease (GERD) involves extensive diagnostic studies and sophisticated surgical techniques. The workup should be comprehensive and purposeful. High resolution impedance manometry (HRIM) provides valuable information regarding peristalsis and lower esophageal sphincter relaxation. The disadvantages of HRIM such as intolerance or inability to pass the catheter led to its selective use or even omission especially in laparoscopic hiatal hernia repair with partial fundoplication. This pragmatic approach risks missing motility disorders in patients with secondary reflux symptoms related to achalasia or scleroderma. Endolumenal functional lumen imaging probe (endoFLIP) can fill this void as it evaluates the dynamics of the esophagogastric junction under sedation. This study aims to compare the outcomes of preoperative use of HRIM vs endoFLIP for laparoscopic repair of hiatal hernia with partial fundoplication. METHODS This is a retrospective cohort study for consecutive patients who underwent antireflux surgery with partial fundoplication between July 2018 and February 2021. Preoperative and postoperative outcomes were compared between two cohorts of patients: those with preoperative HRIM and those with preoperative endoFLIP. RESULTS A total of 72 patients were evaluated, 41 had preoperative HRIM and 31 had endoFLIP. There was no statistically significant difference in their age, sex, BMI, duration of GERD symptoms, or proton pump inhibitors use. The endoscopic findings of esophagitis, hiatal hernia, and Hill's grade were comparable. There was no difference in the American Society of Anesthesiology classification or the choice of antireflux surgery. The improvement of postoperative GERD scores and dysphagia subscore was similar between the two groups. CONCLUSION Performing partial fundoplication based on endoFLIP evaluation of the dynamics of the esophagogastric junction is safe and does not increase postoperative dysphagia compared to preoperative manometric use. Randomized prospective studies are needed to confirm the findings of this study.
Collapse
Affiliation(s)
- Medhat Fanous
- Department of Surgery, 474223Aspirus Iron River Hospital and Clinics, Iron River, MI, USA
| | - Wei Wei
- Department of Surgery, 24729Chesapeake Regional Medical Center, Chesapeake, VA, USA
| |
Collapse
|
8
|
Nikolic M, Matic A, Kristo I, Paireder M, Asari R, Osmokrovic B, Semmler G, Schoppmann SF. Additional fundophrenicopexia, after Nissen fundoplication, reduces postoperative dysphagia and re-operation rate in the long-term follow up. Surg Endosc 2021; 36:3019-3027. [PMID: 34159461 PMCID: PMC9001554 DOI: 10.1007/s00464-021-08598-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 06/06/2021] [Indexed: 01/19/2023]
Abstract
Background Various technical modifications of Nissen fundoplication (NF) that aim to improve patients’ outcomes have been discussed. This study aims to evaluate the effect of division of the short gastric vessels (SGV) and the addition of a standardized fundophrenicopexia on the postoperative outcome after NF. Methods 283 consecutive patients with GERD treated with NF were divided into four groups following consecutive time periods: with division of the SGV and without fundophrenicopexia (group A), with division of the SGV and with fundophrenicopexia (group B), without division of the SGV and with fundophrenicopexia (group C) and without division of the SGV and without fundophrenicopexia (group D). Postoperative contrast swallow, dysphagia scoring, GEDR-HRQL and proton pump inhibitor intake were evaluated. A comparative analysis of patients with division of the SGV and those without (161 A + B vs. 122 C + D), and patients with fundophrenicopexia and those without (78 A vs. 83 B and 49 C vs. 73 D) was performed. Results Fundophrenicopexia reduced postoperative dysphagia rates (0 group C vs. 5 group D, p = 0.021) in patients where the SGV were preserved and reoperation rates (1 group B vs. 7 group A, p = 0.017) in patients where the SGV were divided. There was no significant difference in the postoperative rates of heartburn relief, dysphagia, gas bloating syndrome, interventions, re-fundoplication and the GERD-HRQL score between groups A + B and C + D, respectively. Conclusion Standardized additional fundophrenicopexia in patients undergoing Nissen fundoplication significantly reduces postoperative dysphagia in patients without division of the SGV and reoperation rates in patients with division of the SGV. Division of the SGV has no influence on the postoperative outcome of NF.
Collapse
Affiliation(s)
- Milena Nikolic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Aleksa Matic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Ivan Kristo
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Matthias Paireder
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Reza Asari
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Bogdan Osmokrovic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Georg Semmler
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Sebastian F Schoppmann
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
| |
Collapse
|
9
|
Friedman AJ, Elseth AJ, Brockmeyer JR. Proton Pump Inhibitors, Associated Complications, and Alternative Therapies: A Shifting Risk Benefit Ratio. Am Surg 2021; 88:20-27. [PMID: 33560890 DOI: 10.1177/0003134821991988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Our goal was to compile the most recent and accurate data on the side effects of proton pump inhibitors (PPI). We also compared the efficacy of PPI to the efficacy of different surgical options for acid reflux control. BACKGROUND Proton pump inhibitors are the primary therapy for chronic control of gastroesophageal reflux disease (GERD), but newer studies demonstrate deleterious side effects. Collating this information and contrasting it with surgical therapy for GERD provides evidence for possible practice changes in treatment. METHODS A literature search utilizing PubMed was performed evaluating for PPI and anti-reflux surgery (ARS), focusing on articles that reflected information regarding the usage and efficacy of symptom control of both PPI and ARS. Search terms included "ARS, fundoplication, MSA, acute interstitial nephritis, acute kidney injury, chronic kidney disease, meta-analysis, PPI, H2 blocker, cardiovascular risk, and gut dysbiosis." We evaluated 271 articles by title, abstract, and data for relevance and included 70. RESULTS Long-term control of GERD with PPI may have a greater than expected side effect profile than initially thought. Surgical options may provide greater symptom control than PPI without the side effects of long-term medical therapy. CONCLUSIONS Anti-reflux control can be safely achieved with either PPI or surgical options; however, the long-term side effects noted in the review such as increased risk of cardiovascular events, renal disease, and gut dysbiosis may suggest surgical anti-reflux control as a better long-term option.
Collapse
Affiliation(s)
- Alexander J Friedman
- General Surgery Department, 19911Dwight D. Eisenhower Army Medical Center, Fort Gordon, GA, USA
| | - Anna J Elseth
- General Surgery Department, 19911Dwight D. Eisenhower Army Medical Center, Fort Gordon, GA, USA
| | - Joel R Brockmeyer
- General Surgery Department, 19911Dwight D. Eisenhower Army Medical Center, Fort Gordon, GA, USA
| |
Collapse
|
10
|
Renzi A, Minieri G, Coretti G, Di Marzo M, Di Sarno A, Odierna G, Barbato D, Barone G. Severe dysphagia after antireflux surgery: a rare case of esophageal hiatal stenosis. Clin J Gastroenterol 2021; 14:39-43. [PMID: 33449311 DOI: 10.1007/s12328-020-01318-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
Severe and persistent dysphagia (PD) due to a stenosis of the esophageal hiatus is a serious and rare complication after antireflux procedures. In the case report presented here, the treatment of dysphagia, which arose eight weeks after surgery and progressively worsened, required a new laparoscopic approach. The re-intervention undertaken allowed us to identify the cause of the dysphagia, a tight hiatal stenosis, and to treat it successfully.
Collapse
Affiliation(s)
- Adolfo Renzi
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy.
| | - Gianluca Minieri
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Guido Coretti
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Michele Di Marzo
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Antonia Di Sarno
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Giovanni Odierna
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Domenico Barbato
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| | - Gianni Barone
- Esophageal Diseases Center and GERD Unit, Buon Consiglio Hospital-Fatebenefratelli, Naples, Italy
| |
Collapse
|
11
|
Mandovra P, Kalikar V, Patankar R. Quantitative assessment of crural closure for laparoscopic anti-reflux surgeries: A novel technique to reduce post-operative dysphagia. J Minim Access Surg 2021; 17:458-461. [PMID: 32964875 PMCID: PMC8486049 DOI: 10.4103/jmas.jmas_85_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: Long-term dysphagia is a known complication of laparoscopic anti-reflux surgery (LARS). Of the several factors, inadequate hiatal closure is one of the major reasons for its occurrence. The aim of this study is to develop a technique for the quantitative assessment of crural closure during LARS to reduce dysphagia. Materials and Methods: It is an analysis of prospectively collected data of 109 patients who underwent LARS at a tertiary healthcare centre in India. To identify the adequacy of hiatal closure intraoperatively, a 7 French Fogarty catheter was used, and its balloon was inflated with 1 cc air at the repaired hiatus. This inflated balloon in the repaired hiatus following cruroplasty gives an accurate quantitative assessment of the adequate closure and adequate space for food bolus to pass without causing mechanical obstruction after hiatus repair. Pre- and post-operative 12 months’ DeMeester scores and lower oesophageal sphincter (LES) pressures were calculated. Results: The patients had a significant reduction in DeMeester scores postoperatively from a mean of 68.5–12.3 (P < 0.0001). None of the patients had long-term dysphagia or the need for long-term proton-pump inhibitors. The mean LES pressures on post-operative manometry showed increase to 15.1 mmHg from a mean of 6.4 mmHg, which was statistically significant (P = 0.0001). None of the patients had a recurrence of hiatus hernia. Conclusion: Quantitative assessment of adequacy for crural closure during LARS using a 7 French Fogarty catheter balloon is a novel technique which may decrease the incidence of post-operative dysphagia or intrathoracic wrap migration or recurrence of hiatus hernia.
Collapse
|
12
|
Renzi A, Di Sarno G, d'Aniello F, Brillantino A, Minieri G, Coretti G, Barbato D, Barone G. Complete Fundus Mobilization Reduces Dysphagia After Nissen Procedure. Surg Innov 2020; 28:272-283. [PMID: 33236675 DOI: 10.1177/1553350620971174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background. Anti-reflux surgery is an effective treatment for gastroesophageal reflux disease (GERD). Nevertheless, surgery is still indicated with great caution in relation to the risk of complications, and in particular to postoperative dysphagia (PD). Objective. To compare the clinical outcomes, with particular focus on the incidence and severity of PD, of laparoscopic Nissen-Rossetti fundoplication (NRF) and floppy Nissen fundoplication (FNF) with complete fundus mobilization, in the surgical treatment of GERD. Methods. Ninety patients with GERD were enrolled. Forty-four patients (21[47.7%] men, 23[52.2%] women; mean age 42.4 ± 14.3 years) underwent NRF (Group A), and 46 patients (23[50%] men, 23[50%] women; mean age 43.3 ± 15.4 years) received laparoscopic FNF with complete fundus mobilization (Group B). Clinical assessment was performed using a structured questionnaire and SF-36 quality of life (QoL) score. PD was assessed using a validated classification, and an overall outcome was also determined by asking the patient to score it. Results. At 24-month follow-up, 38 (88.3%) patients in Group A vs 39 (86.6%) in Group B reported to be completely satisfied with reflux relief and free of protonic pump inhibitors (PPIs), while 3 (6.9%) in Group A vs 2(4.4%) in Group B reported occasional PPI intake and 2(4.6%) in Group A vs 4(8.8%) in Group B needed regular PPI use. Persistent PD was observed in 8(18.6%) patients in Group A and in 2(4.4%) in Group B (P = .03). No significant differences were found in the QoL score and in the overall outcome perceived by the patients. Conclusion. FNF, with complete fundus mobilization, appears to be associated with a lower rate of postoperative persistent dysphagia.
Collapse
Affiliation(s)
- Adolfo Renzi
- Esophageal Diseases Center and GERD Unit, 18620Buon Consiglio Hospital - Fatebenefratelli, Naples, Italy
| | | | | | | | - Gianluca Minieri
- Esophageal Diseases Center and GERD Unit, 18620Buon Consiglio Hospital - Fatebenefratelli, Naples, Italy
| | - Guido Coretti
- Esophageal Diseases Center and GERD Unit, 18620Buon Consiglio Hospital - Fatebenefratelli, Naples, Italy
| | - Domenico Barbato
- Esophageal Diseases Center and GERD Unit, 18620Buon Consiglio Hospital - Fatebenefratelli, Naples, Italy
| | - Gianni Barone
- Esophageal Diseases Center and GERD Unit, 18620Buon Consiglio Hospital - Fatebenefratelli, Naples, Italy
| |
Collapse
|
13
|
Nikolic M, Schwameis K, Kristo I, Paireder M, Matic A, Semmler G, Semmler L, Schoppmann SF. Ineffective Esophageal Motility in Patients with GERD is no Contraindication for Nissen Fundoplication. World J Surg 2020; 44:186-193. [PMID: 31605176 DOI: 10.1007/s00268-019-05229-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Patients with preoperative ineffective esophageal motility (IEM) are thought to be at increased risk for postoperative dysphagia leading to the recommendations for tailoring or avoiding anti-reflux surgery in these patients. The aim of this study was to evaluate if IEM has an influence on postoperative outcome after laparoscopic Nissen fundoplication (LNF). METHODS Seventy-two consecutive patients with IEM underwent LNF and were case-matched with 72 patients without IEM based on sex, age, BMI, HH size, total pH percentage time, total number of reflux episodes and the presence of BE. Standardized interview assessing postoperative gastrointestinal symptoms, proton pump inhibitor intake, GERD-health-related-quality-of-life (GERD-HRQL), alimentary satisfaction and patients' overall satisfaction was evaluated. RESULTS Although a higher rate of preoperative dysphagia was observed in patients with IEM (29% IEM vs. 11% no IEM, p = 0.007), there was no significant difference in rates of dysphagia postoperatively (2 IEM vs. 1 no IEM, p = 0.559). Furthermore, no distinction was found in the postoperative outcome regarding symptom relief, quality of life, gas bloating syndrome, ability to belch and/or vomit or revision surgery between the two groups. CONCLUSION Although preoperative IEM has an influence on GERD presentation, it has no effect on postoperative outcome after LNF. IEM should not be a cause for avoiding LNF, as is has been shown as the most effective and safe anti-reflux treatment.
Collapse
Affiliation(s)
- Milena Nikolic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Katrin Schwameis
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Ivan Kristo
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Matthias Paireder
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Aleksa Matic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Georg Semmler
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Lorenz Semmler
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Sebastian F Schoppmann
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
| |
Collapse
|
14
|
Postoperative Gastrointestinal Complaints After Laparoscopic Nissen Fundoplication. Surg Laparosc Endosc Percutan Tech 2020; 31:8-13. [PMID: 32649341 DOI: 10.1097/sle.0000000000000820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE To investigate the postoperative gastrointestinal complaints and their effects on the satisfaction level of patients after laparoscopic Nissen fundoplication (LNF). MATERIALS AND METHODS Over a 7-year period, 553 patients who underwent "floppy" LNF were evaluated for preoperative and postoperative complaints. For this purpose, a set of questions derived from gastroesophageal reflux disease-health-related quality-of-life questionnaire (GERD-HRQL) was used. A P-value of <0.05 was considered to show a statistically significant result. RESULTS The present study included 215 patients with a mean follow-up of 60 months. Reflux-related symptoms [regurgitation (17.7%), heartburn (17.2%), and vomiting (3.7%)] and nonspecific symptoms [bloating (50.2%), abdominal pain (15.3%), and belching (27%)] showed a significant decrease (P<0.001) after the surgery. Inability to belch (25.1%) and early satiety (29.3%) were the newly emerged symptoms. The percentage of patients with flatulence increased from 23.3% to 38.1% after LNF. There was no significant difference for dysphagia (25.6%) and diarrhea (15.3%) in the postoperative period. Of the patients, 15.3% had recurrent preoperative complaints and 9.8% were using drugs for that condition. Satisfaction level and preference for surgery were 82.8% and 91.6%, respectively. There was no significant difference in GERD-HRQL score according to body mass index. CONCLUSIONS This is the first study in which postoperative reflux-related and nonspecific gastrointestinal complaints are analyzed together for a long follow-up period. We found a significant decrease in many reflux-related and nonspecific symptoms. Although some disturbing complaints like inability to belch, early satiety, and flatulence emerged, the preference for surgery did not change.
Collapse
|
15
|
Danilova DA, Bazaev AV, Gorbunova LI. [Current aspects of surgical treatment of gastro-esophageal reflux disease]. Khirurgiia (Mosk) 2020:89-94. [PMID: 32105262 DOI: 10.17116/hirurgia202002189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gastroesophageal reflux disease (GERD) is characterized by abnormal reflux of gastric content into the esophagus, pharynx, respiratory tract and oral cavity. In recent years, there has been a significant increase of the incidence of this disease, that significantly aggravates quality of life of the population. The 'gold standard' for treating GERD is anti-secretory therapy with proton pump inhibitors (PPIs). However, up to 40% of patients are unresponsive to PPIs even after dose adjustment. Advantages and disadvantages of modern surgical approaches for this pathology are reviewed. Laparoscopic fundoplication including Nissen (360°), Toupet (270°) and Dor procedures (180°) is the most common anti-reflux operation. In addition, new alternative surgical options are also discussed. For example, these are minimally invasive methods such as LINX reflux control system, electrical stimulation of the lower esophageal sphincter and transoral incisionless fundoplication (TIF). These methods are less aggressive and have less side effects. A comparative assessment of modern methods of surgical treatment of GERD is made.
Collapse
Affiliation(s)
- D A Danilova
- Privolzhsky Research Medical University of the Ministry of Health of the Russia, Nizhniy Novgorod, Russia
| | - A V Bazaev
- Privolzhsky Research Medical University of the Ministry of Health of the Russia, Nizhniy Novgorod, Russia
| | - L I Gorbunova
- Privolzhsky Research Medical University of the Ministry of Health of the Russia, Nizhniy Novgorod, Russia
| |
Collapse
|
16
|
Nikolic M, Schwameis K, Paireder M, Kristo I, Semmler G, Semmler L, Steindl A, Mosleh BO, Schoppmann SF. Tailored modern GERD therapy - steps towards the development of an aid to guide personalized anti-reflux surgery. Sci Rep 2019; 9:19174. [PMID: 31844179 PMCID: PMC6914788 DOI: 10.1038/s41598-019-55510-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 11/28/2019] [Indexed: 12/11/2022] Open
Abstract
As the incidence of gastroesophageal reflux disease (GERD) is rising, surgical treatment is continuously advancing in an effort to minimize side effects, whilst maintaining efficacy. From a database of patients that underwent anti-reflux surgery at our institution between 2015 and 2018, the last 25 consecutive patients that underwent electrical stimulation (ES), magnetic sphincter augmentation (MSA) and Nissen fundoplication (NF), following a personalized treatment decision aid, were included in a comparative analysis. After preoperative evaluation each patient was referred for an ES, MSA or NF based on esophageal motility, hiatal hernia (HH) size and the patients’ preferences. Postoperative gastrointestinal symptoms and GERD-Health-related-Quality-of-Life were assessed. Preoperatively the median DCI (299 ES vs. 1523.5 MSA vs. 1132 NF, p = 0.001), HH size (0.5 cm ES vs. 1 cm MSA vs. 2 cm NF, p = 0.001) and presence of GERD-related symptoms differed significantly between the groups. The highest rate of postoperative dysphagia was seen after MSA (24%, p = 0.04), while the median GERD HRQL total score was equally distributed between the groups. The positive short-term postoperative outcome and patient satisfaction indicate that such an aid in treatment indication, based on esophageal motility, HH size and patient preference, represents a feasible tool for an ideal choice of operation and an individualized therapy approach.
Collapse
Affiliation(s)
- Milena Nikolic
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Katrin Schwameis
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Matthias Paireder
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Ivan Kristo
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Georg Semmler
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Lorenz Semmler
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Ariane Steindl
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Berta O Mosleh
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria
| | - Sebastian F Schoppmann
- Department of Surgery, Division of General Surgery, Medical University of Vienna, Waehringer Guertel, 18-20 1090, Vienna, Austria.
| |
Collapse
|
17
|
Campanello M, Westin E, Unosson J, Lindskog S. Quality of life and gastric acid‐suppression medication 20 years after laparoscopic fundoplication. ANZ J Surg 2019; 90:76-80. [DOI: 10.1111/ans.15471] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/01/2019] [Accepted: 08/21/2019] [Indexed: 01/11/2023]
Affiliation(s)
- Magnus Campanello
- Department of SurgeryHalland Hospital Varberg Region Halland Sweden
- Department of SurgeryInstitute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Erik Westin
- Department of SurgeryHalland Hospital Varberg Region Halland Sweden
- Department of SurgeryInstitute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Jon Unosson
- Department of General SurgeryUppsala University Hospital Uppsala Sweden
| | - Stefan Lindskog
- Department of SurgeryHalland Hospital Varberg Region Halland Sweden
- Department of SurgeryInstitute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| |
Collapse
|