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Dive into the research topics where Jean-Christophe Valats is active.

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Featured researches published by Jean-Christophe Valats.


Endoscopy | 2015

Endoscopic treatment of fistula after sleeve gastrectomy: results of a multicenter retrospective study

Dimitri Christophorou; Jean-Christophe Valats; Natalie Funakoshi; Claire Duflos; Marie-Chistine Picot; Frédéric Prat; Phillipe Bulois; Julien Branche; Sébastien Decoster; Emmanuel Coron; Antoine Charachon; Guillaume Pineton de Chambrun; David Nocca; Paul Bauret; Pierre Blanc

BACKGROUND AND STUDY AIMS Fistula is the main complication of laparoscopic sleeve gastrectomy (LSG), for which healing is difficult to achieve. The aims of the study were to evaluate the efficacy of interventional endoscopy for post-LSG fistula treatment, to evaluate various endoscopic techniques used and identify their complications, and to identify predictive factors of healing following endoscopic treatment. PATIENTS AND METHODS This retrospective multicenter study included patients with post-LSG fistula. Therapeutic procedures were evaluated, taking into account complications and healing times. Endoscopic procedures were considered to have promoted healing if no other surgical procedure was performed. Predictive factors of healing were identified by univariate and multivariate analysis. RESULTS A total of 110 patients were included, of whom 6 (5.5 %) healed spontaneously, 81 (73.6 %) healed following endoscopic treatment, and 19 (17.3 %) healed following surgery. Healing rates following endoscopic treatment were 84.4 % in the first 6 months of treatment (65/77), 52.4 % for treatment lasting 6 - 12 months (11/21), and 41.7 % after 12 months of treatment (5/12). A drainage procedure (surgical, endoscopic, or percutaneous) was performed in 92 patients (83.6 %). A total of 177 esogastric stents were placed in 88 patients (80.0 %). Surgical debridement, clip placement, glue sealing, and plug placement were also performed. Multivariate analysis identified four predictive factors of healing following endoscopic treatment: interval < 21 days between fistula diagnosis and first endoscopy (P = 0.003), small fistula (P = 0.01), interval between LSG and fistula ≤ 3 days (P = 0.01), no history of gastric banding (P = 0.04). CONCLUSION Endoscopic treatment facilitated healing of post-LSG fistula in 74 % of patients. Early endoscopic treatment increased the likelihood of success, and was most effective during the first 6 months of management. After this point, surgical treatment should be considered.


Alimentary Pharmacology & Therapeutics | 2015

Systematic review with meta-analysis: infliximab and immunosuppressant therapy vs. infliximab alone for active ulcerative colitis.

Dimitri Christophorou; Natalie Funakoshi; Y. Duny; Jean-Christophe Valats; Michael Bismuth; G. Pineton de Chambrun; J.-P. Daures; Pierre Blanc

The benefit of the combination of infliximab (IFX) and immunosuppressant (IS) therapy is debated in ulcerative colitis (UC).


Gastrointestinal Endoscopy | 2013

Covered self-expandable biliary stents for the treatment of bleeding after ERCP.

Jean-Christophe Valats; Natalie Funakoshi; Paul Bauret; B Hanslik; Anne Dorandeu; Dimitri Christophorou; Michael Bismuth; Pierre Blanc

disorders: a clinical feasibility study (with video). Gastrointest Endosc 2007;65:832-41. 5. Maydeo A, Kwek BE, Bhandari S, et al. Single-operator cholangioscopyguided laser lithotripsy in patients with difficult biliary and pancreatic ductal stones (with videos). Gastrointest Endosc 2011;74: 1308-14. 6. Thomas M, Howell DA, Carr-Locke D, et al. Mechanical lithotripsy of pancreatic and biliary stones: complications and available treatment options collected from expert centers. Am J Gastroenterol 2007;102: 1896-902.


Endoscopy | 2018

Endoscopic ultrasound-guided choledochoduodenostomy with electrocautery-enhanced lumen-apposing stents: a retrospective analysis

Jérémie Jacques; Jocelyn Privat; Fabien Pinard; Fabien Fumex; Jean-Christophe Valats; Azzedine Chaoui; Franck Cholet; Bruno Godard; Philippe Grandval; Romain Legros; Sebastien Kerever; Bertrand Napoleon

BACKGROUND  Endoscopic ultrasound-guided biliary drainage is an alternative to percutaneous biliary drainage in cases of malignant biliary obstruction and failure of classic endoscopic drainage by endoscopic retrograde cholangiopancreatography (ERCP). Recently, a new electrocautery-enhanced lumen-apposing metal stent (ECE-LAMS) that allows for endoscopic anastomosis (apposition stent) has become available for use in EUS-choledochoduodenostomy (EUS-CDS) and facilitates the procedure. METHODS  This was a retrospective study of all EUS-CDS procedures performed in France between April 2016 and August 2017. The primary end point was the technical and clinical success rates of EUS-CDS using an ECE-LAMS. RESULTS  52 consecutive patients were included in the study. The etiology of distal bile duct obstruction was distal pancreatic adenocarcinoma in 43 patients (82.7 %). The technical success rate was 88.5 % (46 /52 patients), and the clinical success rate was 100 % (46/46 patients). The mean duration of the procedure was 10.2 minutes (range 1 - 90). Two patients (3.8 %) presented with short-term complications after EUS-CDS and before discharge from hospital. In univariate analyses, a small diameter of the common bile duct and not following the recommended procedure technique were significant risk factors for technical failure. Over a mean follow-up of 157 days, the median survival time without biliary complications was 135 days. CONCLUSION  EUS-CDS with an ECE-LAMS is efficacious and safe in distal malignant obstruction of the common bile duct and could be proposed as the first option in cases of ERCP failure.


World Journal of Gastroenterology | 2017

Stricturing Crohn’s disease-like colitis in a patient treated with belatacept

Anne Bozon; Guillaume Jeantet; Benjamin Riviere; Natalie Funakoshi; Gaspard Dufour; Roman Combes; Jean-Christophe Valats; Sylvie Delmas; Jean Emmanuel Serre; Michael Bismuth; Moglie Le Quintrec; Pierre Blanc; Guillaume Pineton de Chambrun

Cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) modifying agents have been involved in the development of intestinal inflammation, especially therapeutic monoclonal antibodies directed against CTLA-4. Here we report the appearance of a severe stricturing Crohn’s disease-like colitis in a patient with a kidney allograft who was treated with belatacept, a recombinant CTLA-4-Ig fusion protein.


Annals of Hepatology | 2012

Meta-analysis: beta-blockers versus banding ligation for primary prophylaxis of esophageal variceal bleeding

Natalie Funakoshi; Yohan Duny; Jean-Christophe Valats; Frédérique Ségalas-Largey; Nicolas Flori; Michael Bismuth; Jean-Pierre Daurès; Pierre Blanc


World Journal of Gastroenterology | 2010

Benefit of combination β-blocker and endoscopic treatment to prevent variceal rebleeding: A meta-analysis

Natalie Funakoshi; Frédérique Ségalas-Largey; Yohan Duny; Frédéric Oberti; Jean-Christophe Valats; Michael Bismuth; Jean-Pierre Daurès; Pierre Blanc


Drugs | 2013

Pegylated interferon-α2a and ribavirin versus pegylated interferon-α2b and ribavirin in chronic hepatitis C : a meta-analysis

Nicolas Flori; Natalie Funakoshi; Yohan Duny; Jean-Christophe Valats; Michael Bismuth; Dimitri Christophorou; Jean-Pierre Daurès; Pierre Blanc


European Journal of Gastroenterology & Hepatology | 2018

Oral vancomycin induces sustained deep remission in adult patients with ulcerative colitis and primary sclerosing cholangitis

Guillaume Pineton de Chambrun; Maria Nachury; Natalie Funakoshi; Romain Gerard; Michael Bismuth; Jean-Christophe Valats; Fabrizio Panaro; Francis Navarro; Pierre Desreumaux; Benjamin Pariente; Pierre Blanc


Endoscopy | 2018

Cholédocoduodénostomie échoendoscopiquement guidée avec les prothèses d'apposition Hot Axios. Résultats de l'ensemble des procédures françaises depuis la commercialisation

Bertrand Napoleon; Jocelyn Privat; F Pinard; Fabien Fumex; Jérémie Jacques; Jean-Christophe Valats; A Chaoui; Ulriikka Chaput; Franck Cholet; B Godart; Philippe Grandval; Romain Legros

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Pierre Blanc

University of Montpellier

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Michael Bismuth

University of Montpellier

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David Nocca

University of Montpellier

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Gaspard Dufour

University of Montpellier

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Yohan Duny

University of Montpellier

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Fabrizio Panaro

University of Montpellier

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Frédéric Prat

Paris Descartes University

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Barbara Tassy

University of Montpellier

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