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Khamaysa M, Lefort M, Pélégrini-Issac M, Lackmy-Vallée A, Mendili MME, Preuilh A, Devos D, Bruneteau G, Salachas F, Lenglet T, Amador MM, Le Forestier N, Hesters A, Gonzalez J, Rolland AS, Desnuelle C, Chupin M, Querin G, Georges M, Morelot-Panzini C, Marchand-Pauvert V, Pradat PF. Quantitative brainstem and spinal MRI in amyotrophic lateral sclerosis: implications for predicting noninvasive ventilation needs. J Neurol 2024; 271:1235-1246. [PMID: 37910250 DOI: 10.1007/s00415-023-12045-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/01/2023] [Accepted: 10/03/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Respiratory complications resulting from motor neurons degeneration are the primary cause of death in amyotrophic lateral sclerosis (ALS). Predicting the need for non-invasive ventilation (NIV) in ALS is important for advance care planning and clinical trial design. The aim of this study was to assess the potential of quantitative MRI at the brainstem and spinal cord levels to predict the need for NIV during the first six months after diagnosis. METHODS Forty-one ALS patients underwent MRI and spirometry shortly after diagnosis. The need for NIV was monitored according to French health guidelines for 6 months. The performance of four regression models based on: clinical variables, brainstem structures volumes, cervical spinal measurements, and combined variables were compared to predict the need for NIV within this period. RESULTS Both the clinical model (R2 = 0.28, AUC = 0.85, AICc = 42.67, BIC = 49.8) and the brainstem structures' volumes model (R2 = 0.30, AUC = 0.85, AICc = 40.13, BIC = 46.99) demonstrated good predictive performance. In addition, cervical spinal cord measurements model similar performance (R2 = 0.338, AUC = 0.87, AICc = 37.99, BIC = 44.49). Notably, the combined model incorporating predictors from all three models yielded the best performance (R2 = 0.60, AUC = 0.959, AICc = 36.38, BIC = 44.8). These findings are supported by observed positive correlations between brainstem volumes, cervical (C4/C7) cross-sectional area, and spirometry-measured lung volumes. CONCLUSIONS Our study shows that brainstem volumes and spinal cord area are promising measures to predict respiratory intervention needs in ALS.
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Affiliation(s)
- M Khamaysa
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - M Lefort
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - M Pélégrini-Issac
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - A Lackmy-Vallée
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - M M El Mendili
- APHM, Hôpital Timone, CEMEREM, Marseille, France
- Aix Marseille Univ, CNRS, CRMBM, Marseille, France
| | - A Preuilh
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - D Devos
- Département de Neurologie, Centre Référent SLA, CHU de Lille, Centre LICEND COEN, ACT4-ALS-MND network, Lille, France
- Départment de Pharmacologie Médicale, Université de Lille, INSERM UMRS_1172 LilNCog, CHU de Lille, Centre LICEND COEN, ACT4-ALS-MND network, Lille, France
| | - G Bruneteau
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
| | - F Salachas
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
| | - T Lenglet
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
- Faculté de Médecine de Nice, Département de Neurologie, Université Cote d'Azur, Nice, France
- Département de Neurophysiologie, APHP, Hôpital Pitié-Salpêtrière, Paris, France
| | - Md M Amador
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
| | - N Le Forestier
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
- Département de Recherche en Éthique, EA 1610: Etudes des Sciences et Techniques, Université Paris Sud/Paris Saclay, Paris, France
| | - A Hesters
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France
| | - J Gonzalez
- Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM UMRS1158, Sorbonne Université, Paris, France
| | - A-S Rolland
- Départment de Pharmacologie Médicale, Université de Lille, INSERM UMRS_1172 LilNCog, CHU de Lille, Centre LICEND COEN, ACT4-ALS-MND network, Lille, France
| | - C Desnuelle
- Faculté de Médecine de Nice, Département de Neurologie, Université Cote d'Azur, Nice, France
| | - M Chupin
- CATI, Plateforme d'Imagerie Neurologique Multicentrique, Paris, France
| | - G Querin
- APHP, Service de Neuromyologie, Hôpital Pitié-Salpêtrière, Centre Référent Pour les Maladies Neuromusculaires Rares, Paris, France
- Institut de Myologie, Plateforme d'essais cliniques I-Motion, Hôpital Pitié-Salpêtrière, Paris, France
| | - M Georges
- Département des Maladies Respiratoires et Soins Intensifs, Centre de Référence pour les Maladies Pulmonaires Rares, Hôpital Universitaire de Dijon-Bourgogne, Dijon, France
- Université de Bourgogne Franche-Comté, Dijon, France
- Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS 1234 INRA, Université de Bourgogne Franche-Comté, Dijon, France
| | - C Morelot-Panzini
- Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM UMRS1158, Sorbonne Université, Paris, France
- Service de Pneumologie (Département R3S), Groupe Hospitalier Pitié-Salpêtrière, AP-HP, Paris, France
| | - V Marchand-Pauvert
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - P-F Pradat
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France.
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France.
- Northern Ireland Centre for Stratified Medicine, Biomedical Sciences Research Institute Ulster University, C-TRIC, Altnagelvin Hospital, Derry, Londonderry, UK.
- Institut pour la Recherche sur la Moelle Epinière et l'encephale (IRME), 15 rue Duranton, 75015, Paris, France.
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Khamaysa M, Lefort M, Pélégrini-Issac M, Lackmy-Vallée A, Preuilh A, Devos D, Rolland AS, Desnuelle C, Chupin M, Marchand-Pauvert V, Querin G, Pradat PF. Comparison of spinal magnetic resonance imaging and classical clinical factors in predicting motor capacity in amyotrophic lateral sclerosis. J Neurol 2023:10.1007/s00415-023-11727-w. [PMID: 37103756 DOI: 10.1007/s00415-023-11727-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 04/28/2023]
Abstract
BACKGROUND Motor capacity is crucial in amyotrophic lateral sclerosis (ALS) clinical trial design and patient care. However, few studies have explored the potential of multimodal MRI to predict motor capacity in ALS. This study aims to evaluate the predictive value of cervical spinal cord MRI parameters for motor capacity in ALS compared to clinical prognostic factors. METHODS Spinal multimodal MRI was performed shortly after diagnosis in 41 ALS patients and 12 healthy participants as part of a prospective multicenter cohort study, the PULSE study (NCT00002013-A00969-36). Motor capacity was assessed using ALSFRS-R scores. Multiple stepwise linear regression models were constructed to predict motor capacity at 3 and 6 months from diagnosis, based on clinical variables, structural MRI measurements, including spinal cord cross-sectional area (CSA), anterior-posterior, and left-to-right cross-section diameters at vertebral levels from C1 to T4, and diffusion parameters in the lateral corticospinal tracts (LCSTs) and dorsal columns. RESULTS Structural MRI measurements were significantly correlated with the ALSFRS-R score and its sub-scores. And as early as 3 months from diagnosis, structural MRI measurements fit the best multiple linear regression model to predict the total ALSFRS-R (R2 = 0.70, p value = 0.0001) and arm sub-score (R2 = 0.69, p value = 0.0002), and combined with DTI metric in the LCST and clinical factors fit the best multiple linear regression model to predict leg sub-score (R2 = 0.73, p value = 0.0002). CONCLUSIONS Spinal multimodal MRI could be promising as a tool to enhance prognostic accuracy and serve as a motor function proxy in ALS.
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Affiliation(s)
- M Khamaysa
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - M Lefort
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - M Pélégrini-Issac
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - A Lackmy-Vallée
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - A Preuilh
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - D Devos
- Département de Neurology, Centre Référent SLA, CHU de Lille, Centre LICEND COEN, Lille, France
- Départment de Pharmacologie Médicale, Université de Lille, INSERM UMRS_1172 LilNCog, CHU de Lille, Centre LICEND COEN, Lille, France
| | - A-S Rolland
- Départment de Pharmacologie Médicale, Université de Lille, INSERM UMRS_1172 LilNCog, CHU de Lille, Centre LICEND COEN, Lille, France
| | - C Desnuelle
- Faculté Médecine de Nice, Département de Neurologie, Université Cote d'Azur, Nice, France
| | - M Chupin
- CATI Multicenter Neuroimaging Platform, Paris, France
| | - V Marchand-Pauvert
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France
| | - G Querin
- APHP, Service de Neuromyologie, Hôpital Pitié-Salpêtrière, Centre Référent Maladies Neuromusculaires Rares, Paris, France
- Institut de Myologie, I-Motion Clinical Trials Platform, Hôpital Pitié-Salpêtrière, Paris, France
| | - Pierre-François Pradat
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, Paris, France.
- APHP, Département de Neurologie, Hôpital Pitié-Salpêtrière, Centre Référent SLA, Paris, France.
- Northern Ireland Centre for Stratified Medicine, Biomedical Sciences Research Institute Ulster University, C-TRIC, Altnagelvin Hospital, Derry/Londonderry, UK.
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Lefort M, Sharmin S, Andersen JB, Vukusic S, Casey R, Debouverie M, Edan G, Ciron J, Ruet A, De Sèze J, Maillart E, Zephir H, Labauge P, Defer G, Lebrun-Frenay C, Moreau T, Berger E, Clavelou P, Pelletier J, Stankoff B, Gout O, Thouvenot E, Heinzlef O, Al-Khedr A, Bourre B, Casez O, Cabre P, Montcuquet A, Wahab A, Camdessanché JP, Maurousset A, Ben Nasr H, Hankiewicz K, Pottier C, Maubeuge N, Dimitri-Boulos D, Nifle C, Laplaud DA, Horakova D, Havrdova EK, Alroughani R, Izquierdo G, Eichau S, Ozakbas S, Patti F, Onofrj M, Lugaresi A, Terzi M, Grammond P, Grand'Maison F, Yamout B, Prat A, Girard M, Duquette P, Boz C, Trojano M, McCombe P, Slee M, Lechner-Scott J, Turkoglu R, Sola P, Ferraro D, Granella F, Shaygannejad V, Prevost J, Maimone D, Skibina O, Buzzard K, Van der Walt A, Karabudak R, Van Wijmeersch B, Csepany T, Spitaleri D, Vucic S, Koch-Henriksen N, Sellebjerg F, Soerensen PS, Hilt Christensen CC, Rasmussen PV, Jensen MB, Frederiksen JL, Bramow S, Mathiesen HK, Schreiber KI, Butzkueven H, Magyari M, Kalincik T, Leray E. Impact of methodological choices in comparative effectiveness studies: application in natalizumab versus fingolimod comparison among patients with multiple sclerosis. BMC Med Res Methodol 2022; 22:155. [PMID: 35637426 PMCID: PMC9150358 DOI: 10.1186/s12874-022-01623-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/25/2022] [Indexed: 11/18/2022] Open
Abstract
Background Natalizumab and fingolimod are used as high-efficacy treatments in relapsing–remitting multiple sclerosis. Several observational studies comparing these two drugs have shown variable results, using different methods to control treatment indication bias and manage censoring. The objective of this empirical study was to elucidate the impact of methods of causal inference on the results of comparative effectiveness studies. Methods Data from three observational multiple sclerosis registries (MSBase, the Danish MS Registry and French OFSEP registry) were combined. Four clinical outcomes were studied. Propensity scores were used to match or weigh the compared groups, allowing for estimating average treatment effect for treated or average treatment effect for the entire population. Analyses were conducted both in intention-to-treat and per-protocol frameworks. The impact of the positivity assumption was also assessed. Results Overall, 5,148 relapsing–remitting multiple sclerosis patients were included. In this well-powered sample, the 95% confidence intervals of the estimates overlapped widely. Propensity scores weighting and propensity scores matching procedures led to consistent results. Some differences were observed between average treatment effect for the entire population and average treatment effect for treated estimates. Intention-to-treat analyses were more conservative than per-protocol analyses. The most pronounced irregularities in outcomes and propensity scores were introduced by violation of the positivity assumption. Conclusions This applied study elucidates the influence of methodological decisions on the results of comparative effectiveness studies of treatments for multiple sclerosis. According to our results, there are no material differences between conclusions obtained with propensity scores matching or propensity scores weighting given that a study is sufficiently powered, models are correctly specified and positivity assumption is fulfilled. Supplementary Information The online version contains supplementary material available at 10.1186/s12874-022-01623-8.
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Affiliation(s)
- M Lefort
- Arènes - UMR 6051, RSMS (Recherche sur les Services et Management en Santé) - U 1309, Univ Rennes, EHESP, CNRS, Inserm, Rennes, France.,Univ Rennes, CHU Rennes, Investigation Clinique de Rennes)], CIC 1414 [(Centre d, 35000, InsermRennes, France
| | - S Sharmin
- Department of Medicine, University of Melbourne, Melbourne, Australia.,Melbourne MS Centre, Department of Neurology, Royal Melbourne Hospital, Melbourne, Australia
| | - J B Andersen
- Department of Neurology, The Danish Multiple Sclerosis Registry, Copenhagen University Hospital, Rigshospitalet Glostrup, Denmark
| | - S Vukusic
- Service de Neurologie, Sclérose en Plaques, Pathologies de La Myéline Et Neuro-Inflammation, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, 69677, Lyon/Bron, France.,Centre Des Neurosciences de Lyon, UMR5292, Observatoire Français de La Sclérose en Plaques, INSERM, 1028 et CNRS, 69003, Lyon, France.,Université, Claude Bernard Lyon 1, Faculté de médecine Lyon Est, 69000, Lyon, France
| | - R Casey
- Service de Neurologie, Sclérose en Plaques, Pathologies de La Myéline Et Neuro-Inflammation, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, 69677, Lyon/Bron, France.,Centre Des Neurosciences de Lyon, UMR5292, Observatoire Français de La Sclérose en Plaques, INSERM, 1028 et CNRS, 69003, Lyon, France.,Université, Claude Bernard Lyon 1, Faculté de médecine Lyon Est, 69000, Lyon, France.,Eugene Devic EDMUS Foundation, 69677, Lyon/Bron, France
| | - M Debouverie
- Centre Hospitalier Régional Universitaire de Nancy, Hôpital Central, Service de neurologie, Nancy, France
| | - G Edan
- Centre Hospitalier Universitaire de Rennes, Hôpital Pontchaillou, Service de neurologie, Rennes, France
| | - J Ciron
- Centre Hospitalier Universitaire de Toulouse, Hôpital Purpan, CRC-SEP, Département de neurologie, Toulouse, France
| | - A Ruet
- Centre Hospitalier Universitaire de Bordeaux, Hôpital Pellegrin, Service de neurologie, Bordeaux, France
| | - J De Sèze
- Service des maladies inflammatoires du système nerveux - neurologie, centre d'investigation clinique de Strasbourg, Hôpitaux Universitaire de Strasbourg, Hôpital de Hautepierre, INSERM 1434, Strasbourg, France
| | - E Maillart
- Assistance Publique Des Hôpitaux de Paris, Hôpital de La Pitié-Salpêtrière, Service de neurologie, Paris, France
| | - H Zephir
- Centre Hospitalier Universitaire de Lille, Hôpital Salengro, Service de neurologie D, Lille, France
| | - P Labauge
- Centre Hospitalier Universitaire de Montpellier, Hôpital Gui de Chauliac, Service de neurologie, Montpellier, France
| | - G Defer
- Centre Hospitalier Universitaire de Caen Normandie, Hôpital Côte de Nacre, Service de neurologie, Caen, France
| | - C Lebrun-Frenay
- Centre Hospitalier Universitaire de Nice, UR2CA-URRIS,, Université Nice Côte d'Azur, Hôpital, Pasteur 2, Service de neurologie, Nice, France
| | - T Moreau
- Centre Hospitalier Universitaire Dijon Bourgogne, Hôpital François Mitterrand, Maladies Inflammatoires du Système Nerveux Et Neurologie Générale, Service de neurologie, Dijon, France
| | - E Berger
- Centre Hospitalier Régional Universitaire de Besançon, Hôpital Jean Minjoz, Service de neurologie, Besançon, France
| | - P Clavelou
- Centre Hospitalier Universitaire de Clermont-Ferrand, Hôpital Gabriel-Montpied, Service de neurologie, Clermont-Ferrand, France
| | - J Pelletier
- Service de Neurologie, Aix Marseille Univ, APHM, Hôpital de La Timone, Pôle de Neurosciences Cliniques, 13005, Marseille, France
| | - B Stankoff
- Assistance Publique Des Hôpitaux de Paris, Hôpital Saint-Antoine, Service de neurologie, Paris, France
| | - O Gout
- Fondation Adolphe de Rothschild de L'œil Et du Cerveau, Service de neurologie, Paris, France
| | - E Thouvenot
- Centre Hospitalier Universitaire de Nîmes, Hôpital Carémeau, Service de neurologie, Nîmes, France
| | - O Heinzlef
- Centre Hospitalier Intercommunal de Poissy Saint-Germain-en-Laye, Service de neurologie, Poissy, France
| | - A Al-Khedr
- Centre Hospitalier Universitaire d'Amiens Picardie, Site sud, Service de neurologie, Amiens, France
| | - B Bourre
- Rouen University Hospital, 76000, Rouen, France
| | - O Casez
- Centre Hospitalier Universitaire Grenoble-Alpes, Site nord, Service de neurologie, Grenoble/La Tronche, France
| | - P Cabre
- Centre Hospitalier Universitaire de Martinique, Hôpital Pierre Zobda-Quitman, Service de neurologie, Fort-de-France, France
| | - A Montcuquet
- Centre Hospitalier Universitaire Limoges, Hôpital Dupuytren, Service de neurologie, Limoges, France
| | - A Wahab
- Assistance Publique Des Hôpitaux de Paris, Hôpital Henri Mondor, Service de neurologie, Créteil, France
| | - J P Camdessanché
- Centre Hospitalier Universitaire de Saint-Étienne, Hôpital Nord, Service de neurologie, Saint-Étienne, France
| | - A Maurousset
- Centre Hospitalier Régional Universitaire de Tours, Hôpital Bretonneau, Service de neurologie, Tours, France
| | - H Ben Nasr
- Centre Hospitalier Sud Francilien, Service de neurologie, Corbeil-Essonnes, France
| | - K Hankiewicz
- Centre Hospitalier de Saint-Denis, Hôpital Casanova, Service de neurologie, Saint-Denis, France
| | - C Pottier
- Centre Hospitalier de Pontoise, Service de neurologie, Pontoise, France
| | - N Maubeuge
- Centre Hospitalier Universitaire de Poitiers, Site de La Milétrie, Service de neurologie, Poitiers, France
| | - D Dimitri-Boulos
- Assistance Publique Des Hôpitaux de Paris, Hôpital Bicêtre, Service de neurologie, Le Kremlin-Bicêtre, France
| | - C Nifle
- Centre Hospitalier de Versailles, Hôpital André-Mignot, Service de neurologie, Le Chesnay, France
| | - D A Laplaud
- CHU de Nantes, Service de Neurologie & CIC015 INSERM, 44093, Nantes, France.,INSERM CR1064, 44000, Nantes, France
| | - D Horakova
- Department of Neurology and Center of Clinical Neuroscience, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - E K Havrdova
- Department of Neurology and Center of Clinical Neuroscience, First Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - R Alroughani
- Division of Neurology, Department of Medicine, Amiri Hospital, Sharq, Kuwait
| | - G Izquierdo
- Hospital Universitario Virgen Macarena, Seville, Spain
| | - S Eichau
- Hospital Universitario Virgen Macarena, Seville, Spain
| | - S Ozakbas
- Dokuz Eylul University, Konak/Izmir, Turkey
| | - F Patti
- GF Ingrassia Department, University of Catania, Catania, Italy.,Policlinico G Rodolico, Catania, Italy
| | - M Onofrj
- Department of Neuroscience, Imaging, and Clinical Sciences, University G. d'Annunzio, Chieti, Italy
| | - A Lugaresi
- Dipartimento Di Scienze Biomediche E Neuromotorie, Università Di Bologna, Bologna, Italy.,IRCCS Istituto Delle Scienze Neurologiche Di Bologna, Bologna, Italy
| | - M Terzi
- Medical Faculty, 19 Mayis University, Samsun, Turkey
| | - P Grammond
- CISSS Chaudiere-Appalache, Levis, Canada
| | | | - B Yamout
- Nehme and Therese Tohme Multiple Sclerosis Center, American University of Beirut Medical Center, Beirut, Lebanon
| | - A Prat
- Hopital Notre Dame, Montreal, Canada.,CHUM and Universite de Montreal, Montreal, Canada
| | - M Girard
- Hopital Notre Dame, Montreal, Canada.,CHUM and Universite de Montreal, Montreal, Canada
| | - P Duquette
- Hopital Notre Dame, Montreal, Canada.,CHUM and Universite de Montreal, Montreal, Canada
| | - C Boz
- KTU Medical Faculty Farabi Hospital, Trabzon, Turkey
| | - M Trojano
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - P McCombe
- University of Queensland, Brisbane, Australia.,Royal Brisbane and Women's Hospital, Herston, Australia
| | - M Slee
- Flinders University, Adelaide, Australia
| | - J Lechner-Scott
- School of Medicine and Public Health, University Newcastle, Newcastle, Australia.,Department of Neurology, John Hunter Hospital, Hunter New England Health, Newcastle, Australia
| | - R Turkoglu
- Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey
| | - P Sola
- Department of Neuroscience, Azienda Ospedaliera Universitaria, Modena, Italy
| | - D Ferraro
- Department of Neuroscience, Azienda Ospedaliera Universitaria, Modena, Italy
| | - F Granella
- Department of Medicine and Surgery, University of Parma, Parma, Italy.,Department of Emergency and General Medicine, Parma University Hospital, Parma, Italy
| | | | - J Prevost
- CSSS Saint-Jérôme, Saint-Jerome, Canada
| | | | - O Skibina
- Monash University, Melbourne, Australia
| | - K Buzzard
- Monash University, Melbourne, Australia
| | | | | | - B Van Wijmeersch
- Rehabilitation and MS-Centre Overpelt and Hasselt University, Hasselt, Belgium
| | - T Csepany
- Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - D Spitaleri
- Azienda Ospedaliera Di Rilievo Nazionale San Giuseppe Moscati Avellino, Avellino, Italy
| | - S Vucic
- Westmead Hospital, Sydney, Australia
| | - N Koch-Henriksen
- Department of Clinical Epidemiology, Aarhus University Hospital Aarhus, Aarhus, Denmark
| | - F Sellebjerg
- Danish Multiple Sclerosis Centre, Department of Neurology, Copenhagen University Hospital, Rigshospitalet Glostrup, 2600, Glostrup, Denmark
| | - P S Soerensen
- Danish Multiple Sclerosis Centre, Department of Neurology, Copenhagen University Hospital, Rigshospitalet Glostrup, 2600, Glostrup, Denmark
| | - C C Hilt Christensen
- Department of Neurology, Aalborg University Hospital, Multiple Sclerosis Unit, Aalborg, Denmark
| | - P V Rasmussen
- Aarhus University Hospital, Neurology, PJJ Boulevard, DK-8200, Aarhus N, Denmark
| | - M B Jensen
- Department of Neurology, University Hospital of Northern Sealand, Copenhagen, Denmark
| | - J L Frederiksen
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - S Bramow
- Danish Multiple Sclerosis Centre, Department of Neurology, Copenhagen University Hospital, Rigshospitalet Glostrup, 2600, Glostrup, Denmark
| | - H K Mathiesen
- Department of Neurology, Copenhagen University Hospital Herlev, Copenhagen, Denmark
| | - K I Schreiber
- Danish Multiple Sclerosis Centre, Department of Neurology, Copenhagen University Hospital, Rigshospitalet Glostrup, 2600, Glostrup, Denmark
| | - H Butzkueven
- Central Clinical School, Monash University, Melbourne, Australia.,Department of Neurology, The Alfred Hospital, Melbourne, Australia.,Department of Neurology, Box Hill Hospital, Monash University, Melbourne, Australia
| | - M Magyari
- Melbourne MS Centre, Department of Neurology, Royal Melbourne Hospital, Melbourne, Australia.,Danish Multiple Sclerosis Centre, Department of Neurology, Copenhagen University Hospital, Rigshospitalet Glostrup, 2600, Glostrup, Denmark
| | - T Kalincik
- Department of Medicine, University of Melbourne, Melbourne, Australia.
| | - E Leray
- Arènes - UMR 6051, RSMS (Recherche sur les Services et Management en Santé) - U 1309, Univ Rennes, EHESP, CNRS, Inserm, Rennes, France. .,Univ Rennes, CHU Rennes, Investigation Clinique de Rennes)], CIC 1414 [(Centre d, 35000, InsermRennes, France.
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Chelghaf I, Glemain P, Madec F, Loubersac T, de Vergie S, Branchereau J, Rigaud J, Perrouin-Verbe B, Lefort M, Perrouin-Verbe M. Néphrolithotomie percutanée chez les patients neurologiques : efficacité et morbidité à long terme. Prog Urol 2022; 32:442-450. [DOI: 10.1016/j.purol.2021.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 11/05/2021] [Accepted: 12/14/2021] [Indexed: 10/18/2022]
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5
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Lefort M, Le Corre G, Le Page E, Rizzato C, Le Port D, Michel L, Kerbrat A, Leray E, Edan G. Ten-year follow-up after mitoxantrone induction for early highly active relapsing-remitting multiple sclerosis: An observational study of 100 consecutive patients. Rev Neurol (Paris) 2022; 178:569-579. [PMID: 35181157 DOI: 10.1016/j.neurol.2021.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Six monthly courses of mitoxantrone were approved in France in 2003 for patients with highly active multiple sclerosis (MS). OBJECTIVE To report the 10-year clinical follow-up and safety of mitoxantrone as an induction drug followed by maintenance therapy in patients with early highly active relapsing-remitting MS (RRMS) and an Expanded Disability Status Scale (EDSS) score<4, 12months prior to mitoxantrone initiation. METHODS In total, 100 consecutive patients with highly active RRMS from the Rennes EDMUS database received monthly mitoxantrone 20mg combined with methylprednisolone 1g for 3 (n=75) or 6months (n=25) followed by first-line disease-modifying drug (DMD). The 10-year clinical impact was studied through clinical activity, DMD exposure, and adverse events. RESULTS Twenty-four percent were relapse-free over 10years and the mean annual number of relapses was 0.2 at 10years. The mean EDSS score remained significantly improved for up to 10years, changing from 3.5 at mitoxantrone initiation to 2.7 at 10years. The probability of disability worsening and improvement from mitoxantrone initiation to 10years were respectively 27% and 58%, and 13% converted to secondary progressive MS. Patients only remained untreated or treated with a first-line maintenance DMD for 6.5years in average. In our cohort, mitoxantrone was generally safe. No leukemia was observed and six patients developed neoplasms, including 4 solid cancers. CONCLUSION Monthly mitoxantrone for 3 or 6months, followed by maintenance first-line treatment, may be an attractive therapeutic option for patients with early highly active RRMS, particularly in low-income countries.
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Affiliation(s)
- M Lefort
- Univ Rennes, EHESP, CNRS, ARENES - UMR 6051, 15 avenue du Professeur Léon Bernard, 35000 Rennes, France; Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France
| | - G Le Corre
- Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - E Le Page
- Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France; Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - C Rizzato
- Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - D Le Port
- Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - L Michel
- Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France; Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - A Kerbrat
- Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France; Neurology Department, Pontchaillou University Hospital, Rennes, France
| | - E Leray
- Univ Rennes, EHESP, CNRS, ARENES - UMR 6051, 15 avenue du Professeur Léon Bernard, 35000 Rennes, France; Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France
| | - G Edan
- Rennes Clinical Investigation Center, Rennes University, Rennes University Hospital, INSERM, Rennes, France; Neurology Department, Pontchaillou University Hospital, Rennes, France.
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Bouteille C, Chelghaf I, Glémain P, Rigaud J, Perrouin-verbe B, Lefort M, Kieny P, Perrouin-Verbe M, Loubersac T. Résultats d’une étude comparative de la mini-néphrolithotomie percutanée, néphrolithotomie percutanée et de l’urétérorénoscopie souple dans la prise en charge des calculs rénaux de plus de 15 mm chez les patients porteurs de vessie neurologique. Prog Urol 2021. [DOI: 10.1016/j.purol.2021.08.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Lepoittevin L, Leon G, Perrouin-Verbe B, Lefort M, Reiss B, Karam G, Rigaud J, Le Normand L, Perrouin-Verbe MA. [External sphincterotomy in neurological patients with detrusor sphincter dyssynergia: Short and mid-term results]. Prog Urol 2021; 32:40-46. [PMID: 33541792 DOI: 10.1016/j.purol.2020.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND To evaluate in the short and mid-term the success of external sphincterotomy (ES) in neurological patients with detrusor sphincter dyssynergia (DSD). METHODS Retrospective, monocentric study, conducted in 51 patients who had a first ES between January 2003 and June 2018, with at least two years of follow-up. The success of ES was defined by maintenance of reflex voiding mode at the end of follow-up. Secondary outcomes were early postoperative complications, rate of revision, functional impact, urodynamic follow-up and upper urinary tract impact. RESULTS The median age was 50.6 years and the median follow-up was 4.6 years. The success rate was 80% (n=41). Ten patients had to change their voiding mode. For 5 patients, it was related to secondary detrusor low contractility. A second ES was required for 39% of patients. At the end of follow-up, there was a significant improvement in Autonomic Dysreflexia (AD) (26 vs 7 patients, P<0.001), urinary tract infections (UTI) (31 vs 15 patients, P<0.001) and a significant decrease in post-voiding residuals (200 vs 50mL, P<0.001). CONCLUSION ES allowed to maintain reflex voiding in 80% of our patients. It significantly improves AD and UTI despite a high rate of re-operation (39%). A long-term follow-up is mandatory in order not to ignore a recurrence of bladder outlet obstruction and/or decrease in detrusor contractility, which may justify a re-operation or an alternative bladder management. LEVEL OF EVIDENCE III.
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Affiliation(s)
- L Lepoittevin
- Service universitaire de médecine physique et réadaptation neurologique, centre hospitalier universitaire de Nantes, site Saint-Jacques, 85, rue Saint-Jacques, 44093 Nantes, France.
| | - G Leon
- Service de chirurgie urologique, centre hospitalier universitaire de Nantes, site Hôtel Dieu, 1, place Alexis-Ricordeau, 44093 Nantes, France
| | - B Perrouin-Verbe
- Service universitaire de médecine physique et réadaptation neurologique, centre hospitalier universitaire de Nantes, site Saint-Jacques, 85, rue Saint-Jacques, 44093 Nantes, France
| | - M Lefort
- Service universitaire de médecine physique et réadaptation neurologique, centre hospitalier universitaire de Nantes, site Saint-Jacques, 85, rue Saint-Jacques, 44093 Nantes, France
| | - B Reiss
- Service universitaire de médecine physique et réadaptation neurologique, centre hospitalier universitaire de Nantes, site Saint-Jacques, 85, rue Saint-Jacques, 44093 Nantes, France
| | - G Karam
- Service de chirurgie urologique, centre hospitalier universitaire de Nantes, site Hôtel Dieu, 1, place Alexis-Ricordeau, 44093 Nantes, France
| | - J Rigaud
- Service de chirurgie urologique, centre hospitalier universitaire de Nantes, site Hôtel Dieu, 1, place Alexis-Ricordeau, 44093 Nantes, France
| | - L Le Normand
- Service de chirurgie urologique, centre hospitalier universitaire de Nantes, site Hôtel Dieu, 1, place Alexis-Ricordeau, 44093 Nantes, France
| | - M A Perrouin-Verbe
- Service de chirurgie urologique, centre hospitalier universitaire de Nantes, site Hôtel Dieu, 1, place Alexis-Ricordeau, 44093 Nantes, France
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8
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Roux J, Guilleux A, Lefort M, Leray E. Use of healthcare services by patients with multiple sclerosis in France over 2010-2015: a nationwide population-based study using health administrative data. Mult Scler J Exp Transl Clin 2019; 5:2055217319896090. [PMID: 31903222 PMCID: PMC6923529 DOI: 10.1177/2055217319896090] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/31/2019] [Accepted: 11/21/2019] [Indexed: 12/21/2022] Open
Abstract
Background Most of the knowledge about people with multiple sclerosis (PwMS) in France
comes from cohorts, which may suffer from recruitment bias or from the
unique registry located in Lorraine, East France. Objective To describe use of care in the French population of PwMS, over 2010–2015. Methods All PwMS in the French national health data system (97% of the general
population covered) were included. Demographics, and use of care were
described (visits with general practitioners (GPs), neurologists, nurses,
physiotherapists and hospitalisations). A focus on the neurological
follow-up was also conducted. Results A total of 112,415 PwMS were identified (sex ratio F:M = 2.4, median age 46),
of whom 5005 died during follow-up. The median numbers of visits with GPs
and neurologists were 6.6 and 1.3 respectively per patient-year. Moreover,
53,457 (47.6%) received multiple sclerosis (MS) treatments; about 13% of
patients had no neurological follow-up, and 81.8% had at least one
hospitalisation. Conclusions For the first time in France, this exhaustive dataset offered the opportunity
to provide objective figures regarding care practices for MS at the national
level, without any selection bias. It also allowed description of patients
with MS according to their neurological follow-up, especially those who were
absent from cohorts led by neurologists.
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Affiliation(s)
- J Roux
- Univ Rennes, EHESP, REPERES (Pharmacoepidemiology and health services research-EA 7449), Rennes, France
| | - A Guilleux
- Univ Rennes, EHESP, REPERES (Pharmacoepidemiology and health services research-EA 7449), Rennes, France
| | - M Lefort
- Univ Rennes, EHESP, REPERES (Pharmacoepidemiology and health services research-EA 7449), Rennes, France
| | - E Leray
- Univ Rennes, EHESP, REPERES (Pharmacoepidemiology and health services research-EA 7449), Rennes, France
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Caron E, Lesimple B, Debarle C, Lefort M, Galanaud D, Perlbarg V, Puybasset L, Pradat-Diehl P. Neuropsychological assessment of a long-term (LT) outcome after severe traumatic brain injury (TBI). Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Fraile Sanz A, Casado Alvarez R, Caballero R, Delpon E, Perea J, Alcon B, Gil-Fournier B, Ramiro-Leon S, Pavon R, Lesmes F, Thuissard I, Lefort M, Tamargo J, Alonso J, G Cosio F. P1584A HCN4 previously undescribed variant in a large kindred with familial atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux158.210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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12
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Weiss J, Lefort M. Effets chimiques dus à l’excitation par les électrons secondaires produits par les rayonnements ionisants. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1955520539] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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14
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15
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16
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Lefort M, Vigneau C, Laurent A, Le Meur-Rouillard N, Jais JP, Daugas E, Bayat S. Accès à la transplantation rénale en Bretagne et en Île-de-France. Rev Epidemiol Sante Publique 2016. [DOI: 10.1016/j.respe.2016.06.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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17
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Cohen ME, Lefort M, Bergeret-Cassagne H, Hachi S, Li A, Russ G, Lazard D, Menegaux F, Leenhardt L, Trésallet C, Frouin F. Detection of recurrent nerve paralysis: Development of a Computer Aided Diagnosis system. Ing Rech Biomed 2015. [DOI: 10.1016/j.irbm.2015.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Lefort M, Vigneau C, Couchoud C, Jais J, Le Meur N, Daugas E, Bayat S. Comparaison des déterminants de l’accès à la liste d’attente de greffe rénale en Île-de-France et en Bretagne. Nephrol Ther 2015. [DOI: 10.1016/j.nephro.2015.07.463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Lefèvre C, Bellier Waast F, Kiény P, Lejeune F, Lefort M, Perrouin-Verbe B. The medical and surgical care chain in neuro-injured patients: The experience of the Nantes University Hospital from 2004 to 2014. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Frouin F, Zhang Z, Cohen ME, Lefort M, de Cesare A, Pellot-Barakat C, Lucidarme O. Interest of reference region models to monitor cancer treatment using dynamic contrast enhanced studies. Cancer Imaging 2014. [PMCID: PMC4242642 DOI: 10.1186/1470-7330-14-s1-p28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Cohen ME, Pellot-Barakat C, Tacchella JM, Lefort M, De Cesare A, Lebenberg J, Souedet N, Lucidarme O, Delzescaux T, Frouin F. Quantitative evaluation of rigid and elastic registrations for abdominal perfusion imaging with X-ray computed tomography. Ing Rech Biomed 2013. [DOI: 10.1016/j.irbm.2013.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Chenet A, Lefort M, Kieny P. Creation of a network of sports clubs for patients with multiple sclerosis in the Pays de la Loire region. Ann Phys Rehabil Med 2013. [DOI: 10.1016/j.rehab.2013.07.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Caremel R, Hamel O, Gerardin E, Lenormand L, Parker F, Lefort M, Grise P, Perrouin-Verbe B. [Post-traumatic syringomyelia: What should know the urologist?]. Prog Urol 2012; 23:8-14. [PMID: 23287478 DOI: 10.1016/j.purol.2012.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Revised: 08/27/2012] [Accepted: 09/08/2012] [Indexed: 11/26/2022]
Abstract
The incidence of post-traumatic syringomyelia (PTS) is estimated according to recent studies at 25 to 30% of patients with traumatic spinal cord injuries in magnetic resonance imaging (MRI), which remains the gold standard exam for syringomyelia diagnosis and monitoring. Syringomyelia is translated by an increased cord signal (similar to CSF) with low-density T1-weighted image and high-density T2-weighted image, which extends beyond site of initial lesion at least to two vertebral segments. Two conditions are required for development of PTS: traumatic spinal cord injury and blocked the flow of CSF epidural. The mean interval from spinal cord injury to diagnosis SPT was 2.8years (range, 3months to 34years). The commonest symptoms are pain and sensory loss. PTS should be suspected if the patient has new neurological symptoms above level of injury, such as dissociated sensory injuries, reflexes abolition, and motor deficit, after the neural function becomes stable for certain time. In urologic practice, new neurological symptoms could be bladder and/or erectile dysfunction. The medical management based on prevention efforts with closed-glottis pushing, which could aggravate the syrinx cavity. In urology, extracorporeal shockwave lithotripsy, and laparoscopic or robotic surgery could extend the syrinx cavity for the same reason (increase abdominal pressure). The indications for surgical intervention and optimal surgical treatment technique for patients with PTS are not consensual. The literature demonstrated that surgery PTS is effective at arresting or improving motor deterioration, but not sensory dysfunction or pain syndromes.
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Affiliation(s)
- R Caremel
- Service d'urologie, hôpital Charles-Nicolle, 1, rue de Germont, 76000 Rouen, France.
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Perrouin-Verbe B, Lefort M. Filière médico-chirurgicale de traitement des escarres chez le sujet neurologique. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Chenoune Y, Pellot-Barakat C, Constantinides C, Berbari RE, Lefort M, Roullot E, Mousseaux E, Frouin F. Methodology for Jointly Assessing Myocardial Infarct Extent and Regional Contraction in 3-D CMRI. IEEE Trans Biomed Eng 2012; 59:2650-9. [DOI: 10.1109/tbme.2012.2205925] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Cado G, Kerdjoudj H, Chassepot A, Lefort M, Benmlih K, Hemmerlé J, Voegel JC, Jierry L, Schaaf P, Frère Y, Boulmedais F. Polysaccharide films built by simultaneous or alternate spray: a rapid way to engineer biomaterial surfaces. Langmuir 2012; 28:8470-8478. [PMID: 22554108 DOI: 10.1021/la300563s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigated polysaccharide films obtained by simultaneous and alternate spraying of a chitosan (CHI) solution as polycation and hyaluronic acid (HA), alginate (ALG), and chondroitin sulfate (CS) solutions as polyanions. For simultaneous spraying, the film thickness increases linearly with the cumulative spraying time and passes through a maximum for polyanion/CHI molar charge ratios lying between 0.6 and 1.2. The size of polyanion/CHI complexes formed in solution was compared with the simultaneously sprayed film growth rate as a function of the polyanion/CHI molar charge ratio. A good correlation was found. This suggests the importance of polyanion/polycation complexation in the simultaneous spraying process. Depending on the system, the film topography is either liquid-like or granular. Film biocompatibility was evaluated using human gingival fibroblasts. A small or no difference is observed in cell viability and adhesion between the two deposition processes. The CHI/HA system appears to be the best for cell adhesion inducing the clustering of CD44, a cell surface HA receptor, at the membrane of cells. Simultaneous or alternate spraying of CHI/HA appears thus to be a convenient and fast procedure for biomaterial surface modifications.
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Affiliation(s)
- G Cado
- Centre National de la Recherche Scientifique, Institut Charles Sadron, UPR 22, 23 rue du Loess, 67034 Strasbourg Cedex, France
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Hamel O, Buffenoir K, Lefort M, Perrouin-Verbe B, Robert R. Charcot-Spine. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Herment A, Lefort M, Mousseaux E, de Cesare A, Frouin F. Estimation de la distensibilité aortique à partir de séquences d’images de résonance magnétique « steady-state free-precession » et « contraste de phase ». Ing Rech Biomed 2011. [DOI: 10.1016/j.irbm.2011.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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29
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Lefort M, Boulmedais F, Jierry L, Gonthier E, Voegel JC, Hemmerlé J, Lavalle P, Ponche A, Schaaf P. Simultaneous spray coating of interacting species: general rules governing the poly(styrene sulfonate)/poly(allylamine) system. Langmuir 2011; 27:4653-4660. [PMID: 21417346 DOI: 10.1021/la104809z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Simultaneous spraying of two solutions of interacting species onto a substrate held vertically leads to the formation of nanometer-sized coatings. Here we investigate the simultaneous spraying of poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) solutions leading to the formation of a film composed of PSS/PAH complexes. The thickness of this film increases linearly with the cumulative spraying time. For a given spraying rate of PAH (respectively PSS), the growth rate of the film depends strongly upon the PSS/PAH ratio and passes through a maximum for a PSS/PAH ratio lying between 0.55 and 0.8. For a PSS/PAH ratio that is maintained constant, the growth speed of the film increases linearly with the spraying rate of polyelectrolyte of both solutions. Using X-ray photoelectron spectroscopy, we find that the film composition is almost independent of the PSS/PAH (spayed) ratio, with composition very close to 1:1 in PSS:PAH film. The 1:1 PSS:PAH composition is explained by the fact that the simultaneous spraying experiments are carried out with salt-free solutions; thus, electroneutrality in the film requires exact matching of the charges carried by the polyanions and the polycations. Zeta potential measurements reveal that, depending on whether the PSS/PAH spraying rate ratio lies below or above the optimal spraying rate ratio, the film acquires a positive or a negative excess charge. We also find that the overall film morphology, investigated by AFM, is independent of the spraying rate ratio and appears to be composed of nanometer-sized grains which are typically in the 100 nm range.
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Affiliation(s)
- M Lefort
- Centre National de la Recherche Scientifique (CNRS), Institut Charles Sadron (UPR 22), 23 rue du Loess, 67034 Strasbourg, France
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Lefort M, Stoltz J, Larcan A. Etude d’un modèle de rèpartition des débits dans le lit vasculaire. J Vasc Res 2008. [DOI: 10.1159/000157861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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31
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Stoltz J, Larcan A, Lefort M, Wackenheim E. Etude théorique et expérimentale du concept de zone d’influence à une bifurcation du lit vasculaire. J Vasc Res 2008. [DOI: 10.1159/000157954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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32
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Díaz-Curiel M, de la Piedra C, Romero F, Montero M, Gómez S, Lefort M, Carrascal M, Phipps R. Effect of Risedronate on Bone Mass, Remodelling and Biomechanical Strength in Orchidectomized Rats. Horm Res 2008; 70:93-9. [DOI: 10.1159/000139151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Accepted: 10/03/2007] [Indexed: 11/19/2022]
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Chenet A, Perrouin-Verbe B, Le Normand L, Labat JJ, Brunel P, Lefort M, Mathé JF. Efficacité des injections intradétrusoriennes répétées de toxine A dans l'hyperactivité vésicale d'origine neurologique. ACTA ACUST UNITED AC 2007; 50:651-60. [PMID: 17490775 DOI: 10.1016/j.annrmp.2007.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Accepted: 03/21/2007] [Indexed: 01/07/2023]
Abstract
PURPOSE Toxin injections are an effective treatment for neurogenic detrusor overactivity. The efficacy of repeat injections is not well documented. The objective of this study was to evaluate the efficacy of repeat injections of toxin A to the detrusor in patients with neurogenic overactive bladders. MATERIALS AND METHODS Patients who had received 300-UI injections of Botox(R) were retrospectively studied. The clinical data included continence, duration of the absence of incontinence, changes in anticholinergic dosage or pad use and patient satisfaction. Urodynamic data analyzed were maximal cystometric capacity, bladder contraction and detrusor pressure during contraction. Data were analyzed by Wilcoxon and Kruskal-Wallis tests. RESULTS-DISCUSSION: Data for 42 patients (30 men, 12 women) were analysed. Pathologic features were trauma to the spinal cord, multiple sclerosis or varied causes of myelopathy. Patients received 1 to 6 injections of Botox(R). The mean duration of efficacy was 6 months. Efficacy did not differ among successive injections. Anticholinergic drugs were discontinued in 43% of patients and pad use in 48%. A total of 80% of the patients were satisfied with the treatment. Bladder contraction disappeared in 70% of patients. The mean maximal cystometric capacity increase was 144 ml. CONCLUSION Clinical and urodynamic data show that repeat injection of toxins to the detrusor remains an effective therapy for neurogenic bladder overactivity. Efficacy for continence is maintained during successive injections.
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Affiliation(s)
- A Chenet
- Service de médecine physique et réadaptation neurologique, hôpital Saint-Jacques, CHU de Nantes, 85, rue Saint-Jacques, 44093 Nantes cedex, France
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Muñoz-Calvo MT, Barrios V, García de Alvaro MT, Lefort M, Méndez-Dávila C, Argente J, de la Piedra C. Maintained malnutrition produces a progressive decrease in (OPG)/RANKL ratio and leptin levels in patients with anorexia nervosa. Scand J Clin Lab Invest 2007; 67:387-93. [PMID: 17558893 DOI: 10.1080/00365510601110130] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Osteoprotegerin (OPG) and receptor activator of nuclear factor-kappaB ligand (RANKL) are key factors in bone remodeling in patients with anorexia nervosa (AN) and osteopenia. The purpose of this study was to investigate basal serum levels of OPG, RANKL and leptin, as well as bone mineral density (BMD) measured by DEXA at lumbar vertebrae L1-L4, and their evolution during one year in two groups of patients with AN. MATERIAL AND METHODS Group I included 10 adolescent girls suffering from malnutrition and secondary amenorrhea with an evolution of more than one year at the beginning of the study who received oral estrogen treatment throughout the follow-up period. Group II comprised 10 girls with malnutrition and secondary amenorrhea with an evolution of less than one year who received nutritional treatment only. All parameters were compared with those of a control group of 19 healthy, age-matched girls with normal BMI and regular menstrual cycles. RESULTS The OPG/RANKL ratio was significantly decreased (p<0.05) after 1 year in group I, a fact that was due to an increase (p<0.05) in serum RANKL values. A correlation between OPG/RANKL and BMD was found in group I at the beginning of the study (r = 0.95; p<0.001). Patients in this group showed lower BMD values (p<0.01), both at diagnosis and at the end of the study, than those of group II patients, who showed normal BMD values. CONCLUSION The decrease in the OPG/RANKL ratio in girls with AN could partly explain the increase in bone loss that occurs in these patients.
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Affiliation(s)
- M T Muñoz-Calvo
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Universidad Autónoma, Madrid, Spain
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Lefaucheur J, Labat J, Amarenco G, Herbaut A, Prat-Pradal D, Benaim J, Aranda B, Arne-Bes M, Bonniaud V, Boohs P, Charvier K, Daemgen F, Dumas P, Galaup J, Ismael SS, Kerdraon J, Lacroix P, Lagauche D, Lapeyre E, Lefort M, Leroi A, Opsomer R, Parratte B, Prévinaire J, Raibaut P, Salle J, Scheiber-Nogueira M, Soler J, Testut M, Thomas C. WITHDRAWN: What is the place of electroneuromyographic studies in the diagnosis and management of pudendal neuralgia related to entrapment syndrome? Neurophysiol Clin 2007. [DOI: 10.1016/j.neucli.2007.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Perrouin-Verbe B, Robert R, Lefort M, Agakhani N, Tadié M, Mathé JF. [Post-traumatic syringomyelia]. Neurochirurgie 1999; 45 Suppl 1:58-66. [PMID: 10420404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Clinical and neuroradiological data were recorded in a series of 73 spinal cord injured patients (33 in Nantes, 40 in Paris-Bicêtre) in whom a post traumatic syringomyelia (PTS) developed. These findings and a review of the literature allow to point out some of the main characteristics in such a pathology. Clinical symptoms are frequent, the commonest of them are pain and sensory loss but any alteration of the neurological status after spinal cord injury has to be considered. Magnetic resonance imaging (MRI), sagittal and axial T1 and T2 weighted images, confirms the diagnosis of syrinx (area with the same signal intensity as CSF extending beyond the site of the initial lesion at least on 2 vertebral segments). MRI allows the diagnosis when it is performed in the follow up of asymptomatic patients. So PTS is not infrequent in spinal cord injured patients, for some of them in the first year after the trauma. The highest incidence is found in patients with complete thoracic lesions. Pathophysiology and surgical management have to take into account post traumatic residual stenosis of the vertebral canal.
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Affiliation(s)
- B Perrouin-Verbe
- Pôle de Médecine Physique et de Réadaptation, Hôpital Saint-Jacques, CHU, Nantes
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Buchanan G, Lefort M, Moghimi A, Bensimon C. Crown ethers formally derived from resorcinol. X-ray crystal structure and NMR investigations of dibenzo-26-crown-8. J Mol Struct 1997. [DOI: 10.1016/s0022-2860(97)00088-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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de Vienne D, Josse JM, Maurice A, Causse M, Leonardi A, Touzet P, Krejci E, Gouesnard B, Sanou J, Panouille A, Boyat A, Dubreuil P, Dufour P, Gallais A, Lefort M, Charcosset A, Damerval C. Marquage et expression du génome chez le maïs. Genet Sel Evol 1994. [DOI: 10.1186/1297-9686-26-s1-s21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
A statistical method is presented for detecting quantitative trait loci (QTLs), based on the linear model. Unlike methods able to detect a few well separated QTLs and to estimate their effects and positions, this method considers the genome as a whole and enables the detection of chromosomal segments involved in the differences between two homozygous lines, and their backcross, doubled haploid, or F2 progenies, for a quantitative trait. Genetic markers must be codominant, but missing markers are accepted, provided they are missing independently from the experiment. Asymptotic properties, which are of practical use, are developed. This method does not rely on strong genetic hypotheses, and thus does not permit any precise genetic analysis of the trait under study, but it does assess which regions of the genome are involved, whatever the complexity of the genetic determinism (number, effects and interactions among QTLs). Simultaneous use of several methods, including this one, should lead to better efficiency in QTL detection.
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Affiliation(s)
- F Rodolphe
- INRA, Centre de Recherches de Jouy en Josas, Laboratoire de Biométrie, France
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Jacquet D, Galin J, Borderie B, Gardes D, Guerreau D, Lefort M, Monnet F, Rivet MF, Tarrago X, Duek E, Alexander JM. Approach to the limits for massive energy and spin deposition into a composite nucleus. Phys Rev C Nucl Phys 1985; 32:1594-1604. [PMID: 9953015 DOI: 10.1103/physrevc.32.1594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Harvey BG, Herrmann G, Hoff RW, Hoffmann DC, Hyde EK, Katz JJ, Keller OL, Lefort M, Seaborg GT. Criteria for the Discovery of Chemical Elements. Science 1976; 193:1271-2. [PMID: 17837024 DOI: 10.1126/science.193.4259.1271] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Lefort M, Stoltz J, Larcan A. Etude des embranchements du lit vasculaire première approche à l’aide de la zone d’influence123. Biorheology 1974. [DOI: 10.3233/bir-1974-11105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M. Lefort
- Groupe de Recherches Hémorhéologiques, Centre Régional de Transfusion Sanguine et d’Hématologie et Service de Réanimation, C.H.U. 54 Nancy, France
- Laboratoire de Mécanique des Fluides, Ecole des Mines, 54 Nancy, France
| | - J.F. Stoltz
- Groupe de Recherches Hémorhéologiques, Centre Régional de Transfusion Sanguine et d’Hématologie et Service de Réanimation, C.H.U. 54 Nancy, France
- Laboratoire de Mécanique des Fluides, Ecole des Mines, 54 Nancy, France
| | - A. Larcan
- Groupe de Recherches Hémorhéologiques, Centre Régional de Transfusion Sanguine et d’Hématologie et Service de Réanimation, C.H.U. 54 Nancy, France
- Laboratoire de Mécanique des Fluides, Ecole des Mines, 54 Nancy, France
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Gatty B, Guerreau D, Lefort M, Pouthas J, Tarrago X, Galin J, Cauvin B, Girard J, Nifenecker H. Mass and charge identification of the light products of the reaction 40Ar + natNi. ACTA ACUST UNITED AC 1974. [DOI: 10.1051/jphyslet:01974003509011700] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lefort M, Stoltz JF, Larcan A. [Branches of the vascular bed: a first approach using influence area]. Biorheology 1974; 11:79-86. [PMID: 4824530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Stoltz JF, Lefort M, Wackenheim E, Larcan A. [The problem of branches in the vascular bed. Study of a 2-dimensional model]. Biorheology 1971; 8:165-9. [PMID: 5146950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Stoltz J, Lefort M, Wackenheim E, Larcan A. Considérations sur le problème des embranchements dans le lit vasculaire étude d’un modèle bidimensionnel1. Biorheology 1971. [DOI: 10.3233/bir-1971-83-407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J.F. Stoltz
- Groupe de Recherches Hémorheologiques (Centre Régional de Transfusion et Service de Reànimation) C.H.U de Nancy-54 et Laboratoire de Mécaniques des Fluides, Ecole des Mines, parc de Saurupt 54-Nancy, France
| | - M. Lefort
- Groupe de Recherches Hémorheologiques (Centre Régional de Transfusion et Service de Reànimation) C.H.U de Nancy-54 et Laboratoire de Mécaniques des Fluides, Ecole des Mines, parc de Saurupt 54-Nancy, France
| | - E. Wackenheim
- Groupe de Recherches Hémorheologiques (Centre Régional de Transfusion et Service de Reànimation) C.H.U de Nancy-54 et Laboratoire de Mécaniques des Fluides, Ecole des Mines, parc de Saurupt 54-Nancy, France
| | - A. Larcan
- Groupe de Recherches Hémorheologiques (Centre Régional de Transfusion et Service de Reànimation) C.H.U de Nancy-54 et Laboratoire de Mécaniques des Fluides, Ecole des Mines, parc de Saurupt 54-Nancy, France
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