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3. Influence of 4 preservation solutions on ICU stay, graft and patient survival following liver transplantation

Author

Mallet, A., Cherqui, D., Adam, R., Ciacio, O., Pittau, G., Trechot, B., Boudjema, K., Houssel-Debry, P., Merdignac, A., Rayar, M., Soubrane, O., Dokmak, S., Dondero, F., Sepulveda, A., Bachellier, P., Addeo, P.-F., Faitot, F., Navarro, F., Herrero, A., Jaber, S., Pageaux, G.-P., Vaillant, J.-C., Rousseau, G., Siksik, J.-M., Le Treut, Y.P., Gregoire, E., Hardwigsen, J., Compagnon, P., Lim, C., Salloum, C., Chirica, M., Abba, J., Letoublon, C., Pruvot, F.-R., Boleslawski, E., Salame, E., Barbier, L., Mabrut, J.Y., Mohkam, K., Suc, B., Maulat, C., Chiche, L., Laurent, C., Jeune, F., Perdigao, F., Dao, T., Mulliri, A., Gugenheim, J., Boilot, O., Buc, E., Branchereau, S., Chardot, C., Heyd, B., Savier, E., Brustia, R., Golmard, J.-L., and Scatton, O.

Published
2020
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4. Influence de 4 solutions de préservation sur la durée de réanimation, la survie du greffon et du patient après transplantation hépatique

Author

Mallet, A., Cherqui, D., Adam, R., Ciacio, O., Pittau, G., Trechot, B., Boudjema, K., Houssel-Debry, P., Merdignac, A., Rayar, M., Soubrane, O., Dokmak, S., Dondero, F., Sepulveda, A., Bachellier, P., Addeo, P.-F., Faitot, F., Navarro, F., Herrero, A., Jaber, S., Pageaux, G.-P., Vaillant, J.-C., Rousseau, G., Siksik, J.-M., Le Treut, Y.P., Gregoire, E., Hardwigsen, J., Compagnon, P., Lim, C., Salloum, C., Chirica, M., Abba, J., Letoublon, C., Pruvot, F.-R., Boleslawski, E., Salame, E., Barbier, L., Mabrut, J.Y., Mohkam, K., Suc, B., Maulat, C., Chiche, L., Laurent, C., Jeune, F., Perdigao, F., Dao, T., Mulliri, A., Gugenheim, J., Boilot, O., Buc, E., Branchereau, S., Chardot, C., Heyd, B., Savier, E., Brustia, R., Golmard, J.-L., and Scatton, O.

Published
2020
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9. Advanced donor age does not increase risk of hepatocellular carcinoma recurrence after liver transplantation: a retrospective two-centre analysis using competing risk analysis

Author

Cusumano, C, De Carlis, L, Centonze, L, Lesourd, R, Levi Sandri, G, Lauterio, A, De Carlis, R, Ferla, F, Di Sandro, S, Camus, C, Jezequel, C, Bardou-Jacquet, E, Rayar, M, Cusumano C., De Carlis L., Centonze L., Lesourd R., Levi Sandri G. B., Lauterio A., De Carlis R., Ferla F., Di Sandro S., Camus C., Jezequel C., Bardou-Jacquet E., Rayar M., Cusumano, C, De Carlis, L, Centonze, L, Lesourd, R, Levi Sandri, G, Lauterio, A, De Carlis, R, Ferla, F, Di Sandro, S, Camus, C, Jezequel, C, Bardou-Jacquet, E, Rayar, M, Cusumano C., De Carlis L., Centonze L., Lesourd R., Levi Sandri G. B., Lauterio A., De Carlis R., Ferla F., Di Sandro S., Camus C., Jezequel C., Bardou-Jacquet E., and Rayar M.

Abstract

The impact of donor age on the recurrence of hepatocellular carcinoma (HCC) after liver transplantation is still debated. Between 2002 and 2014, all patients transplanted for HCC in 2 European liver transplantation tertiary centres were retrospectively reviewed. Risk factors for HCC recurrence were assessed using competing risk analysis, and the impact of donor age < or ≥65 years and < or ≥80 years was specifically evaluated after propensity score matching. 728 patients transplanted with a median follow-up of 86 months were analysed. The 1-, 3- and 5-year recurrence rates were 4.9%, 10.7% and 13.9%, respectively. In multivariable analysis, recipient age (sHR: 0.96 [0.93; 0.98], P < 0.01), number of lesions (sHR: 1.05 [1.04; 1.06], P < 0.001), maximum size of the lesions (sHR: 1.37 [1.27; 1.48], P < 0.01), presence of a hepatocholangiocarcinoma (sHR: 6.47 [2.91; 14.38], P < 0.01) and microvascular invasion (sHR: 3.48 [2.42; 5.02], P < 0.01) were significantly associated with HCC recurrence. After propensity score matching, neither donor age ≥65 (P = 0.29) nor donor age ≥80 (P = 0.84) years increased the risk of HCC recurrence. In conclusion, donor age was not found to be a risk factor for HCC recurrence. Patients listed for HCC can receive a graft from an elderly donor without compromising the outcome.

Published
2021

14. Prolonged preservation by hypothermic machine perfusion facilitates logistics in liver transplantation: a European observational cohort study

Author

Brüggenwirth, I, Mueller, M, Lantinga, V, Camagni, S, De Carlis, R, De Carlis, L, Colledan, M, Dondossola, D, Drefs, M, Eden, J, Ghinolfi, D, Koliogiannis, D, Lurje, G, Manzia, T, Monbaliu, D, Muiesan, P, Patrono, D, Pratschke, J, Romagnoli, R, Rayar, M, Roma, F, Schlegel, A, Dutkowski, P, Porte, R, de Meijer, V, Brüggenwirth, Isabel M A, Mueller, Matteo, Lantinga, Veerle A, Camagni, Stefania, De Carlis, Riccardo, De Carlis, Luciano, Colledan, Michele, Dondossola, Daniele, Drefs, Moritz, Eden, Janina, Ghinolfi, Davide, Koliogiannis, Dionysios, Lurje, Georg, Manzia, Tommaso M, Monbaliu, Diethard, Muiesan, Paolo, Patrono, Damiano, Pratschke, Johann, Romagnoli, Renato, Rayar, Michel, Roma, Federico, Schlegel, Andrea, Dutkowski, Philipp, Porte, Robert J, de Meijer, Vincent E, Brüggenwirth, I, Mueller, M, Lantinga, V, Camagni, S, De Carlis, R, De Carlis, L, Colledan, M, Dondossola, D, Drefs, M, Eden, J, Ghinolfi, D, Koliogiannis, D, Lurje, G, Manzia, T, Monbaliu, D, Muiesan, P, Patrono, D, Pratschke, J, Romagnoli, R, Rayar, M, Roma, F, Schlegel, A, Dutkowski, P, Porte, R, de Meijer, V, Brüggenwirth, Isabel M A, Mueller, Matteo, Lantinga, Veerle A, Camagni, Stefania, De Carlis, Riccardo, De Carlis, Luciano, Colledan, Michele, Dondossola, Daniele, Drefs, Moritz, Eden, Janina, Ghinolfi, Davide, Koliogiannis, Dionysios, Lurje, Georg, Manzia, Tommaso M, Monbaliu, Diethard, Muiesan, Paolo, Patrono, Damiano, Pratschke, Johann, Romagnoli, Renato, Rayar, Michel, Roma, Federico, Schlegel, Andrea, Dutkowski, Philipp, Porte, Robert J, and de Meijer, Vincent E

Abstract

A short period (1–2 h) of hypothermic oxygenated machine perfusion (HOPE) after static cold storage is safe and reduces ischemia-reperfusion injury-related complications after liver transplantation. Machine perfusion time is occasionally prolonged for logistical reasons, but it is unknown if prolonged HOPE is safe and compromises outcomes. We conducted a multicenter, observational cohort study of patients transplanted with a liver preserved by prolonged (≥4 h) HOPE. Postoperative biochemistry, complications, and survival were evaluated. The cohort included 93 recipients from 12 European transplant centers between 2014–2021. The most common reason to prolong HOPE was the lack of an available operating room to start the transplant procedure. Grafts underwent HOPE for a median (range) of 4:42 h (4:00–8:35 h) with a total preservation time of 10:50 h (5:50–20:50 h). Postoperative peak ALT was 675 IU/L (interquartile range 419–1378 IU/L). The incidence of postoperative complications was low, and 1-year graft and patient survival were 94% and 88%, respectively. To conclude, good outcomes are achieved after transplantation of donor livers preserved with prolonged (median 4:42 h) HOPE, leading to a total preservation time of almost 21 h. These results suggest that simple, end-ischemic HOPE may be utilized for safe extension of the preservation time to ease transplantation logistics.

Published
2022

16. Liver Transplantation for Unresectable Perihilar Cholangiocarcinoma: Is Neo-Adjuvant Chemo-Radiation Therapy Really Necessary? An International, Multicenter Comparison

Author

Hoogwater, F.J., primary, Kuipers, H., additional, de Meijer, V.E., additional, Maulat, C., additional, Muscari, F., additional, Polak, W.G., additional, van Hoek, B., additional, Jézéquel, C., additional, Alwayn, I.P., additional, IJzermans, J.N., additional, Mohkam, K., additional, Mabrut, J.-Y., additional, van Vilsteren, F.G., additional, Adam, J.-P., additional, Chiche, L., additional, Chebaro, A., additional, Boleslawski, E., additional, Dubbeld, J., additional, Darwish Murad, S., additional, Rayar, M., additional, and Porte, R.J., additional

Published
2022
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20. Deciphering pharmacogenetic-whole blood/intracellular pharmacokinetic-pharmacodynamic (PG-PK2-PD) relationship of tacrolimus in liver transplant recipients

Author

Tron, C., Woillard, J. B., Houssel-Debry, P., David, V., Rayar, M., Balakirouchenane, D., Debord, J., Jezequel, C., Camus, C., Roussel, M., Boudjema, K., Verdier, M. C., Bellissant, E., Lemaitre, F., Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], CHU Limoges, Ciblage individuel et prévention des risques de traitements immunosupresseurs et de la transplantation (IPPRITT), CHU Limoges-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), AP-HP - Hôpital Cochin Broca Hôtel Dieu [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), and Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
liver transplantation, [SDV]Life Sciences [q-bio], pharmacodynamics, modeling, Tacrolimus, pharmacogenetics
Abstract

International audience; Meeting Abstract PS-161

Published
2021

21. Redefining therapeutic drug monitoring of tacrolimus in liver transplantation: can we target trough concentrations below 7 ng/ml during the first month?

Author

Lemaitre, F., Tron, C., Jezequel, C., Lalanne, S., Verdier, M. C., Bardou-Jacquet, E., Camus, C., Boudjema, K., Bellissant, E., Rayar, M., Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], and Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
liver transplantation, therapeutic drug monitoring, [SDV]Life Sciences [q-bio], outcome, immunosuppressive drugs, tacrolimus
Abstract

International audience; Meeting Abstract PM-064

Published
2021

23. Influence of 4 preservation solutions on ICU stay, graft and patient survival following liver transplantation

Author

Savier, E., Brustia, Raffaele, Golmard, J.-L., Scatton, O., Mallet, A., Cherqui, D., Adam, R., Ciacio, O., Pittau, G., Trechot, B., Boudjema, K., Houssel-Debry, P., Merdignac, A., Rayar, M., Soubrane, O., Dokmak, S., Dondero, F., Sepulveda, A., Bachellier, P., Addeo, P.-F., Faitot, F., Navarro, F., Herrero, A., Jaber, Samir, Pageaux, G.-P., Vaillant, J.-C., Rousseau, G., Siksik, J.-M., Le Treut, Y.P., Gregoire, E., Hardwigsen, J., Compagnon, P., Lim, C B, Salloum, C., Chirica, M., Abba, J., Létoublon, C., Pruvot, F.-R., Boleslawski, E., Salame, E., Barbier, L., Mabrut, J.Y., Mohkam, K., Suc, B., Maulat, C., Chiche, L., Laurent, C., Jeune, F., Perdigao, F., Dao, T., Mulliri, A., Gugenheim, J., Boilot, O., Buc, E., Branchereau, S., Chardot, C., Heyd, B., Service de Chirurgie Digestive, Hépato-Bilio-pancréatique et Transplantation Hépatique [CHU Pitié-Salpétrière], CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Département de Biostatistiques [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital Paul Brousse, Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], Service d’Hépatologie [Hôpital Beaujon], Hôpital Beaujon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital de Hautepierre [Strasbourg], Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Cellules Souches, Plasticité Cellulaire, Médecine Régénératrice et Immunothérapies (IRMB), Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046] (PhyMedExp), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Département d'Hépato-Gastroentérologie et de Transplantation Hépatique [CHU Saint-Eloi], Université de Montpellier (UM)-CHU Saint-Eloi, Hôpital de la Timone [CHU - APHM] (TIMONE), Service de pédiatrie médicale et médecine de l'adolescent [Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Hôpital Henri Mondor, Centre Hospitalier Universitaire [Grenoble] (CHU), Département de chirurgie digestive et de l'urgence, CHU Grenoble-Hôpital Michallon, Hôpital Claude Huriez [Lille], CHU Lille, Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), Hôpital de la Croix-Rousse [CHU - HCL], Hospices Civils de Lyon (HCL), Hôpital de Rangueil, CHU Toulouse [Toulouse], Hôpital Pellegrin, CHU Bordeaux [Bordeaux]-Groupe hospitalier Pellegrin, Université Pierre et Marie Curie - Paris 6 (UPMC), CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN), Centre méditerranéen de médecine moléculaire (C3M), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de Nice (CHU Nice), Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre de Recherche en Nutrition Humaine d'Auvergne (CRNH d'Auvergne)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Hôpital Bicêtre, CHU Necker - Enfants Malades [AP-HP], Agence de la Biomédecine, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Hôpital Saint Eloi (CHRU Montpellier), Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Université de Montpellier (UM), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Côte d'Azur (UCA), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Centre Hospitalier Régional Universitaire de Tours (CHRU TOURS)

Subjects
Liver transplantation, [SDV.MHEP.HEG]Life Sciences [q-bio]/Human health and pathology/Hépatology and Gastroenterology, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, ComputingMilieux_MISCELLANEOUS, Preservation solution, Multicenter study, Human
Abstract

International audience

Published
2020
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26. Influence de 4 solutions de préservation sur la durée de réanimation, la survie du greffon et du patient après transplantation hépatique

Author

Savier, E., primary, Brustia, R., additional, Golmard, J.-L., additional, Scatton, O., additional, Mallet, A., additional, Cherqui, D., additional, Adam, R., additional, Ciacio, O., additional, Pittau, G., additional, Trechot, B., additional, Boudjema, K., additional, Houssel-Debry, P., additional, Merdignac, A., additional, Rayar, M., additional, Soubrane, O., additional, Dokmak, S., additional, Dondero, F., additional, Sepulveda, A., additional, Bachellier, P., additional, Addeo, P.-F., additional, Faitot, F., additional, Navarro, F., additional, Herrero, A., additional, Jaber, S., additional, Pageaux, G.-P., additional, Vaillant, J.-C., additional, Rousseau, G., additional, Siksik, J.-M., additional, Le Treut, Y.P., additional, Gregoire, E., additional, Hardwigsen, J., additional, Compagnon, P., additional, Lim, C., additional, Salloum, C., additional, Chirica, M., additional, Abba, J., additional, Letoublon, C., additional, Pruvot, F.-R., additional, Boleslawski, E., additional, Salame, E., additional, Barbier, L., additional, Mabrut, J.Y., additional, Mohkam, K., additional, Suc, B., additional, Maulat, C., additional, Chiche, L., additional, Laurent, C., additional, Jeune, F., additional, Perdigao, F., additional, Dao, T., additional, Mulliri, A., additional, Gugenheim, J., additional, Boilot, O., additional, Buc, E., additional, Branchereau, S., additional, Chardot, C., additional, and Heyd, B., additional

Published
2020
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28. Guide pratique de suivi du transplanté hépatique

Author

Boudjema, K., Houssel-Debry, P., Jézéquel, C., Camus, C., Rayar, M., Lakéhal, M., Jacquet, E.B., Legros, L., Uguen, T., Legue, C., Centre d'Investigation Clinique [Rennes] ( CIC ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale ( INSERM ), CHU Pontchaillou [Rennes], Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
survie, syndrome métabolique, [ SDV ] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], cancer, suivi, insuffisance rénale chronique
Abstract

International audience; Si l’amélioration des techniques chirurgicales et l’immunosuppresison ont permis le développement avec succès de la transplantation d’organe solide, les complications médicales au long cours persistent et sont responsables d’un déclin de la survie dès la première année après la greffe. Les complications liées au greffon (rejet, récidive de la maladie initiale, thrombose vasculaire), tumorales (cancer de novo ou récidive), cardiovasculaires, infectieuses et rénales sont les principales causes de décès après transplantation hépatique. La prévention, le diagnostic et le management de ces complications restent un véritable défi pour tout praticien prenant en charge ces patients. Une meilleure gestion des facteurs tels que le diabète, la dyslipidémie, l’hypertension artérielle et l’insuffisance rénale, peut avoir une incidence sur la mortalité à long terme. Un suivi standardisé associé à un dépistage organisé des complications médicales et chirurgicales sont donc indispensables afin d’adapter précocement la prise en charge et ainsi améliorer la survie après la greffe.

Published
2018
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29. Évaluation de l’impact du débit de perfusion de la circulation régionale normothermique pour le pancréas dans le cadre du DDAC Maastricht 3

Author

Prudhomme, T., primary, Renaudin, K., additional, Kervella, D., additional, Chelly, S., additional, Culty, T., additional, Goujon, A., additional, Verhoest, G., additional, Delpech, P., additional, Boutin, J., additional, Rayar, M., additional, Karam, G., additional, Blancho, G., additional, and Branchereau, J., additional

Published
2019
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30. High intrapatient variability of tacrolimus exposure is associated with poorer outcomes after liver transplantation

Author

Tron, Camille, Rayar, M., Jezequel, C., Petitcollin, A., Houssel-Debry, P., Camus, C., Verdier, M., Sulpice, L., Bellissant, E., Boudjema, K., Lemaître, F., CHU Pontchaillou [Rennes], Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Fonction, structure et inactivation d'ARN bactériens, Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Tron, Camille, Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )

Subjects
[SDV.SP.PHARMA] Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

33. Optical emission study of a doped diamond deposition process by plasma enhanced chemical vapor deposition.

Author

Rayar, M., Supiot, P., Veis, P., and Gicquel, A.

Subjects
*DIAMONDS, *CHEMICAL vapor deposition, *EMISSION spectroscopy, *ORGANIC chemistry, *BORON, *HYDROGEN
Abstract

Standard H2/CH4/B2H6 plasmas (99% of H2 and 1% of CH4, with 0–100 ppm of B2H6 added) used for doped diamond film growth are studied by optical emission spectroscopy in order to gain a better understanding of the influence of boron species on the gas phase chemistry. Only two boron species are detected under our experimental conditions (9/15/23 W cm-3 average microwave power density values), and the emission spectra used for studies reported here are B(2S1/2-2P1/2,3/20) and BH[A 1Π-X 1Σ+(0,0)]. Variations of their respective emission intensities as a function of the ratio B/C, the boron to carbon ratio in the gas mixture, are reported. We confirmed that the plasma parameters (Tg, Te, and ne) are not affected by the introduction of diborane, and the number densities of B atoms and BH radical species were estimated from experimental measurements. The results are compared to those obtained from a zero-dimensional chemical kinetic model where two groups of reactions are considered: (1) BHx+H↔BHx-1+H2 (x=1–3) by analogy with the well-known equilibrium CHx+H set of reactions, which occurs, in particular, in diamond deposition reactors; and (2) from conventional organic chemistry, the set of reactions involving boron species: BHx+C2H2 (x=0–1). The results clearly show that the model based on hydrogen and boron hydrides reactions alone is not consistent with the experimental results, while it is so when taking into account both sets of reactions. Once an upper limit for the boron species number densities has been estimated, axial profiles are calculated on the basis of the plasma model results obtained previously in Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions, and significant differences in trends for different boron species are found. At the plasma-to-substrate boundary, [BH] and [B] drop off in contrast to [BH2], which shows little decrease, and [BH3], which shows little increase, in this region. [ABSTRACT FROM AUTHOR]

Published
2008
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34. Leiomyosarcoma of the inferior vena cava: Chasing the disease

Author

Levi Sandri, G.B., Rayar, M., Sulpice, L., Boudjema, K., Meunier, B., Service de Chirurgie Hépatobiliaire et Digestive [Rennes] = Hepatobiliary and Digestive Surgery [Rennes], CHU Pontchaillou [Rennes], Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Foie, métabolismes et cancer, Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )

Subjects
Leiomyosarcoma, [SDV]Life Sciences [q-bio], ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Humans, Vena Cava, Inferior, Disease-Free Survival, Vascular Neoplasms, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Letter to the Editor

Published
2016
Full Text
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35. Validation of the Meaf Score and Comparaison with Early Allograft Dysfunction Critera on Predicting 3 Months Graft Survival

Author

Rayar, M., Levi Sandri, G. B., Cusumano, C., Lombard, N., Lakehal, M., Desfourneaux, V., Meunier, B., Sulpice, L., Boudjema, K., Service de Chirurgie Hépatobiliaire et Digestive [Rennes] = Hepatobiliary and Digestive Surgery [Rennes], CHU Pontchaillou [Rennes], Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Foie, métabolismes et cancer, Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )

Subjects
[SDV]Life Sciences [q-bio], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2016
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37. Small intrahepatic cholangiocarcinoma (iCCA) or hepatocholangiocarcinoma (HCA) on cirrhosis: liver transplantation (LT) versus resection

Author

Martin, E., Rayar, M., Bergeat, D., Carvalho, L. F. A., Gelli, M., Adam, R., Castaing, D. X., Cherqui, D., Sa-Cunha, A., Didier Samuel, Boleslawski, E., Boudjema, K., Vibert, E., Physiopathologie et traitement des maladies du foie, Université Paris-Sud - Paris 11 (UP11)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de Chirurgie Hépatobiliaire et Digestive [Rennes] = Hepatobiliary and Digestive Surgery [Rennes], CHU Pontchaillou [Rennes], Foie, métabolismes et cancer, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Rythmes Biologiques et Cancers, Université Paris-Sud - Paris 11 (UP11)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), and Jonchère, Laurent

Subjects
[SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], education
Abstract

International audience; 66th Annual Meeting of the American-Association-for-the-Study-of-Liver-Diseases (AASLD). San Francisco, CA, nov 2015

Published
2015

38. The combination of intra-arterial yttrium-90 radioembolization with systemic chemotherapy is a promising method for the downstaging to surgery of initially unresectable huge intrahepatic cholangiocarcinoma

Author

Rayar, M, Sulpice, Laurent, edeline, J, Garin, Etienne, Levi Sandri, G B, Meunier, B., Boucher, Eveline, Boudjema, Karim, Service de Chirurgie Hépatobiliaire et Digestive [Rennes] = Hepatobiliary and Digestive Surgery [Rennes], CHU Pontchaillou [Rennes], Foie, métabolismes et cancer, Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Département d'oncologie médicale [Rennes], CRLCC Eugène Marquis (CRLCC), Jonchère, Laurent, Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )

Subjects
[SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio]
Abstract

International audience; Purpose - To evaluate the downstaging efficacy of yttrium-90 radioembolization (Ytt-90)-associated with chemotherapy and the results of surgery for initially unresectable huge intrahepatic cholangiocarcinoma (ICC). Methods - Between January 2008 and October 2013, unresectable ICC were treated with chemotherapy and Ytt-90. Patients with unique tumors localized to noncirrhotic livers and without extrahepatic metastasis were considered to be potentially resectable and were evaluated every 2 months for possible secondary resection. Results - Forty-five patients were treated for unresectable ICCs; ten had potentially resectable tumors, and eight underwent surgery. Initial unresectability was due to the involvement of the hepatic veins or portal vein of the future liver remnant in seven and one cases, respectively. Preoperative treatment induced significant decreases in tumor volume (295 vs. 168 ml, p = 0.02) and allowed for R0 resection in all cases. Three patients (37.5 %) had Clavien-Dindo grade three or higher complications, including two postoperative deaths. The median follow-ups were 15.6 [range 4-40.7] months after medical treatment initiation and 7.2 [0.13-36.4] months after surgery. At the end of the study period, five patients were still alive, with one patient still alive 40 months after medical treatment initiation (36.4 months after surgery); two patients experienced recurrences. Conclusions - For initially unresectable huge ICCs, chemotherapy with Ytt-90 radioembolization is an effective downstaging method that allows for secondary resectability.

Published
2015
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47. Étude d'un plasma micro-onde d'hydrogène en configuration matricielle pour application potentielle au dépôt de diamant sur grande surface

Author

Rayar, M., Le Quoc, H., Lacoste, A., Pelletier, Jean, Bès, A., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

48. Dipolar plasma source modeling: a first approach

Author

Béchu, Stéphane, Than Vinh, Tran, Lacoste, A., Bès, A., Rayar, M., Pelletier, Jean, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
PIC/Monte-Carlo hybrid method, electron trajectories, Physics::Plasma Physics, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], Physics::Space Physics, dipolar plasma, Magnetostatics, microwave propagation (2.45 GHz)
Abstract

International audience; The scaling up of conventional plasmas presents limitations in terms of plasma density, limited to the critical density, and of uniformity, due to the difficulty of achieving constant amplitude standing wave patterns along linear microwave applicators in the meter range. An alternative solution lies in the concept of distribution from one- to two-dimensional networks of elementary plasma. Each elementary plasma source consists in a permanent magnet on which microwaves are applied via an independent coaxial line [1]. The plasma is produced by the electrons accelerated at ECR (Electron Cyclotron Resonance) and trapped in the dipolar magnetic field. Large-size uniform plasmas can be obtained by assembling as many such elementary plasma sources as necessary, without any physical or technical limitations [2]. Simulation of the plasma produced by a dipolar source requires a global, self consistent, modeling of its functioning. In order to obtain results to lead a first optimization of the dipolar source, magnetostatics, microwave propagation and fast electrons trajectories (Particles in Cell (PIC) and Monte-Carlo hybrid method [3]) have been performed with Comsol Multiphysics and MatLab.

Published
2007

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