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Glize B, Jacquin-Courtois S, Lunven M, Cotton F, Chapeau S, Klinger E, Joseph P, Rode G. Bottom-up effect of prism adaptation on hemineglect in virtual spatial domain. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zecca C, Meier D, Candrian U, Cotton F, Nadarajah N, Sintzel M, Guttmann C, Gobbi C. 8. Natalizumab de-escalation to interferon beta-1b in multiple sclerosis patients. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2012.03.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Glize B, Jacquin-Courtois S, Lunven M, Cotton F, Chapeau S, Klinger E, Joseph P, Rode G. Effet bottom-up de l’adaptation prismatique chez l’héminégligent dans un environnement spatial virtuel. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Langrand C, Bihan H, Raverot G, Varron L, Androdias G, Borson-Chazot F, Brue T, Cathebras P, Pinede L, Muller G, Broussolle C, Cotton F, Valeyre D, Seve P. Hypothalamo-pituitary sarcoidosis: a multicenter study of 24 patients. QJM 2012; 105:981-95. [PMID: 22753675 DOI: 10.1093/qjmed/hcs121] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIM To assess clinical features, treatment and outcome of Hypothalamo-pituitary (HP) sarcoidosis and to determine whether HP is associated with a particular clinical phenotype of sarcoidosis. DESIGN Multicentric retrospective study. METHODS Retrospective chart review. Each patient was matched with two controls. RESULTS Twenty-four patients were identified (10 women, 14 men). Their median age at the sarcoidosis diagnosis was 31.5 years (range: 8-69 years). HP involvement occurred in the course of a previously known sarcoidosis in 11 cases (46%), whereas it preceded the diagnosis in 13 patients (54%). All but two patients had anterior pituitary dysfunction, 12 patients presented with diabetes insipidus. The most common hormonal features were gonadotropin deficiency (n=21), TSH deficiency (n=15) and hyperprolactinemia (n=12). Magnetic Resonance Imaging (MRI) revealed infundibulum involvement (n=8), pituitary stalk thickness (n=12) and involvement of the pituitary gland (n=14). All but two patients received prednisone. After a mean follow-up of 4 years, only two patients recovered from hormonal deficiencies. MRI abnormalities improved or disappeared in 12 cases under corticosteroid. There was no correlation between the hormonal dysfunctions and the radiologic outcomes. Patients with HP sarcoidosis had significantly more frequent sinonasal localizations and neurosarcoidosis and required a systemic treatment more frequently than controls. CONCLUSION Although HP sarcoidosis is unusual, physicians should be aware that such specific localization could be the first manifestation of sarcoidosis. HP involvement is associated with general severity of sarcoidosis. MRI abnormalities can improve or disappear under corticosteroid treatment, but most endocrine defects are irreversible.
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Cotton F, Campillo M. Frequency domain inversion of strong motions: Application to the 1992 Landers earthquake. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/94jb02121] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hannoun S, Durand-Dubief F, Confavreux C, Ibarrola D, Streichenberger N, Cotton F, Guttmann CRG, Sappey-Marinier D. Diffusion tensor-MRI evidence for extra-axonal neuronal degeneration in caudate and thalamic nuclei of patients with multiple sclerosis. AJNR Am J Neuroradiol 2012; 33:1363-8. [PMID: 22383236 DOI: 10.3174/ajnr.a2983] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE MS is an inflammatory demyelinating disease affecting both WM and GM. While WM lesions are easily visualized by conventional MR imaging, the detection of GM alterations remains challenging. This diffusion tensor MR imaging study aimed to detect and characterize diffuse microscopic alterations in 2 deep GM structures, the caudate nucleus and the thalamus, in patients with RR and SP MS. The relationship between diffusivity markers, and atrophy of the caudate and the thalamus, as well as brain lesion load and clinical status of the patients was also explored. MATERIALS AND METHODS Twenty-three RR and 18 SP patients, along with 27 healthy controls, underwent MR imaging examination including anatomic and DTI acquisitions. Volumes, mean FA, and MD of the caudate and the thalamus, as well as WM lesion volumes, were assessed. RESULTS FA was significantly (P < .001) increased in the caudate and the thalamus of patients with MS compared with controls, and was higher in SP compared with RR patients. Increased FA was associated with volume decreases of caudate (r = -0.712; P < .001) and thalamus (r = -0.407; P < .01) in patients with MS. WM T2 lesion load was significantly associated with caudate (r = 0.611; P < .001) and thalamic (r = 0.354; P < .05) FA. Caudate FA, and, to a lesser extent, thalamic FA, were associated with functional deficits, as measured by EDSS and MSFC. CONCLUSIONS Increased FA in the caudate and the thalamus may constitute a sensitive marker of MS pathologic processes, such as loss of dendrites and/or swelling of neuronal cell bodies.
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Rimachi R, Bruzzi de Carvahlo F, Orellano-Jimenez C, Cotton F, Vincent JL, De Backer D. Lactate/pyruvate ratio as a marker of tissue hypoxia in circulatory and septic shock. Anaesth Intensive Care 2012; 40:427-32. [PMID: 22577907 DOI: 10.1177/0310057x1204000307] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In this prospective, observational study, we measured arterial lactate and pyruvate concentrations within the first four hours of shock and at four hour intervals during the first 24 hours in 26 patients with septic and 13 with cardiogenic shock. We also studied 10 intensive care unit patients with normal lactate levels as controls. Seven patients (18%) died during the first 24 hours of shock, 12 (31%) patients died later in the intensive care unit and 21 (54%) were discharged alive from the intensive care unit. Blood lactate values were higher at shock onset in the non-survivors than in the survivors (P=0.02) and remained significantly elevated throughout the study. The lactate/pyruvate ratio at shock onset was significantly higher in the non-survivors (24 [17 to 34] vs 15 [10 to 19], P=0.01) than in the survivors. All patients with cardiogenic shock had hyperlactataemia at the onset of shock, and 69% had a high lactate/pyruvate ratio. Only 65% of patients with septic shock had hyperlactataemia at the onset of shock and 76% of these also had a high lactate/pyruvate ratio. In conclusion, the lactate/pyruvate ratio confirms that hyperlactataemia is frequently, but not solely, due to hypoxia, especially at the onset of shock.
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Radiguet M, Cotton F, Vergnolle M, Campillo M, Walpersdorf A, Cotte N, Kostoglodov V. Slow slip events and strain accumulation in the Guerrero gap, Mexico. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jb008801] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Paleari R, Gulbis B, Cotton F, Mosca A. Interlaboratory comparison of current high-performance methods for HbA2. Int J Lab Hematol 2012; 34:362-8. [PMID: 22321217 DOI: 10.1111/j.1751-553x.2012.01403.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Few data are available on the alignment of the different methods used for HbA(2) quantitation and recent external quality survey results show a consistent spread of HbA(2) values. To this aim, a comparison study among the actual best performing techniques for HbA(2) determination, comprising HPLC and CE methods, was performed. METHODS A total of 80 blood samples collected from normal subjects and β-thalassemia carriers were analyzed by different HPLC (Bio-Rad Variant I, Bio-Rad Variant II, Menarini HA-8160, Tosoh G7, Tosoh G8) and capillary electrophoresis (Beckman Coulter MDQ and ProteomeLab PA 800, Sebia Capillarys 2) methods. Patient's samples with clinically relevant hemoglobin variants (HbC, HbD, HbE, HbS, and δ-chain variants) were also tested by all methods. RESULTS The mean within-run imprecision of HbA(2) measurement (expressed as CV, %) was between 0.5% and 4.4% (HPLC) and between 1.2% and 4.4% (capillary electrophoresis). The comparison study showed that the different methods were highly correlated (r between 0.974 and 0.997) although biased each other. HbA(2) determination in presence of abnormal hemoglobins was variously interfered by both HPLC and CE methods. Concerning HbF, the mean imprecision at HbF values ≥1.5% was between 1.2% and 8.2% (as CVs). CONCLUSIONS A poor alignment of routine methods for HbA(2) measurement was found. The need of a better standardization of HbA(2) measurement procedures was underlined.
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Arion S, Krolak-Salmon P, Cotton F. L’hémosidérose superficielle du névraxe, une entité probablement sous-estimée. J Neuroradiol 2011; 38:223-31. [DOI: 10.1016/j.neurad.2011.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 04/25/2011] [Accepted: 05/09/2011] [Indexed: 01/05/2023]
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Havé L, Drouet A, Lamboley JL, Cotton F, St-Pierre G, Quesnel L, Guilloton L, Felten D. [Toxic leucoencephalopathy after use of sniffed heroin, an unrecognized form of beneficial evolution]. Rev Neurol (Paris) 2011; 168:57-64. [PMID: 21726885 DOI: 10.1016/j.neurol.2011.01.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 12/10/2010] [Accepted: 01/17/2011] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Serious leukoencephalopathy can be related to heroin injection or inhalation. OBSERVATION We report the first case of leukoencephalopathy observed three weeks after a 46-year-old man sniffed heroin. The clinical presentation included cognitive and behaviour disorders, pyramidal irritation and slight gait instability. Blood and cerebrospinal fluid analyse were normal. Brain magnetic resonance imaging showed diffuse, symmetrical supratentorial white matter lesions producing high intense signals on FLAIR and b1000-weighted sequences. Proton spectroscopy revealed an increased rate of cholin, in favour of active demyelinated lesions. Brain biopsy showed intramyelinic oedema with reactive gliosis. After two and a half years, moderate attentional fluctuations and difficulties in initiating activities persisted. Repeated MRI showed a reduction of the leukoencephalopathy. CONCLUSION Heroin could be a cause more common than thought of leukoencephalopathy. The clinical and radiological expression and prognosis could be related to the mode of consummation (inhalation, intravenous injection, sniffing). This parameter may modulate severity and localization of brain lesions. More systematic use of MRI for patients with psychiatric symptoms after heroin intoxications could lead to a better evaluation of heroin-related neurotoxicity and potentially improve prevention.
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Lê PQ, Ferster A, Cotton F, Vertongen F, Vermylen C, Vanderfaeillie A, Dedeken L, Heijmans C, Ketelslegers O, Dresse MF, Gulbis B. Sickle cell disease from Africa to Belgium, from neonatal screening to clinical management. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2010; 70:467-470. [PMID: 21516988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To describe the severity of sickle cell disease (SCD) in newborns in Belgium and evaluate the impact of neonatal screening (NS) on clinical outcome. METHODS Universal NS of umbilical cord blood for hemoglobinopathy was progressively deployed in Brussels and Liège starting in 1994. No particular population was targeted. Samples were analyzed initially using the isoelectric focusing technique and since 2008 the capillary electrophoresis technique. If a hemoglobin variant was suspected, further analysis was carried out using high performance liquid chromatography. Children presenting major hemoglobinopathy, especially SCD, were referred to a specialized centre for comprehensive management. Preventive measures included antipneumococcal prophylaxis immunization/antibiotic therapy, parental training to recognize severe anemia and splenic sequestration, and transcranial ultrasound recording for early detection of intracranial stenosis. A database was set up in Belgium to collect clinical and laboratory data including parental phenotype, diagnostic technique (neonatal screening or not), major clinical events (episodes of dactylitis, acute chest syndrome, severe anemia, infection, etc), number and duration of required hospitalizations, and treatment used. RESULTS Screening of 222352 newborns in maternity units in Brussels led to diagnosis of SCD in 145 patients, Adequate data for analysis of clinical outcome was available for 96 of these children born before 2007. Median age in the study group was 4.2 years and the total duration of follow-up was 510 years. Most cases occurred in families from the Democratic Republic of Congo. (64/96 patients; 66.7%) and involved homozygous hemoglobin S disease (80/96 patients; 83.3%). Twenty-seven percent of patients (26/96) presented no severe clinical events during the study (17 SS, median age 2,1 years (0-13.1 years). Conversely 33% presented an episode of dactylitis and 47.9% (46/96) presented recurrent vasoocclusive crises. Severe anemia was observed in 39.6% (38/96) of cases. Six patients (6.3%) developed septicemia despite prophylactic antibiotic therapy and anti-pneumococcal immunization using heptavalent conjugate vaccine and polysaccharide vaccine, No penicillin-resistant strains were observed. The incidence of stroke was 2.1% (3/96). Two patients presenting homozygous hemoglobin S disease died due to septicemia due to non-compliance with antibiotic therapy in one case and severe anemia in one case. All episodes of septicemia and both deaths occurred at the beginning of the NS program. Hydroxyurea therapy was used in 30 patients (31.2%) including 7 in whom transcranial Doppler depicted blood flow abnormalities and 8 in whom allogeneic bone marrow transplantation was performed. CONCLUSIONS Sickle cell disease is still associated with high morbidity and mortality but clinical care has improved and no death has occurred in the last 10 years. NS is an effective tool for early detection and management of SCD. Neonates with SCD diagnosed by NS in Belgium presented severe manifestations, but clinical outcomes were improved by comprehensive management.
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Rode G, Cotton F, Revol P, Jacquin-Courtois S, Rossetti Y, Bartolomeo P. Representation and disconnection in imaginal neglect. Neuropsychologia 2010; 48:2903-11. [PMID: 20621588 DOI: 10.1016/j.neuropsychologia.2010.05.032] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Revised: 05/01/2010] [Accepted: 05/28/2010] [Indexed: 10/19/2022]
Abstract
Patients with neglect failure to detect, orient, or respond to stimuli from a spatially confined region, usually on their left side. Often, the presence of perceptual input increases left omissions, while sensory deprivation decreases them, possibly by removing attention-catching right-sided stimuli (Bartolomeo, 2007). However, such an influence of visual deprivation on representational neglect was not observed in patients while they were imagining a map of France (Rode et al., 2007). Therefore, these patients with imaginal neglect either failed to generate the left side of mental images (Bisiach & Luzzatti, 1978), or suffered from a co-occurrence of deficits in automatic (bottom-up) and voluntary (top-down) orienting of attention. However, in Rode et al.'s experiment visual input was not directly relevant to the task; moreover, distraction from visual input might primarily manifest itself when representation guides somatomotor actions, beyond those involved in the generation and mental exploration of an internal map (Thomas, 1999). To explore these possibilities, we asked a patient with right hemisphere damage, R.D., to explore visual and imagined versions of a map of France in three conditions: (1) 'imagine the map in your mind' (imaginal); (2) 'describe a real map' (visual); and (3) 'list the names of French towns' (propositional). For the imaginal and visual conditions, verbal and manual pointing responses were collected; the task was also given before and after mental rotation of the map by 180 degrees . R.D. mentioned more towns on the right side of the map in the imaginal and visual conditions, but showed no representational deficit in the propositional condition. The rightward inner exploration bias in the imaginal and visual conditions was similar in magnitude and was not influenced by mental rotation or response type (verbal responses or manual pointing to locations on a map), thus suggesting that the representational deficit was robust and independent of perceptual input in R.D. Structural and diffusion MRI demonstrated damage to several white matter tracts in the right hemisphere and to the splenium of corpus callosum. A second right-brain damaged patient (P.P.), who showed signs of visual but not imaginal neglect, had damage to the same intra-hemispheric tracts, but the callosal connections were spared. Imaginal neglect in R.D. may result from fronto-parietal dysfunction impairing orientation towards left-sided items and posterior callosal disconnection preventing the symmetrical processing of spatial information from long-term memory.
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Barrey C, Massourides H, Cotton F, Perrin G, Rode G. Charcot spine: Two new case reports and a systematic review of 109 clinical cases from the literature. Ann Phys Rehabil Med 2010; 53:200-20. [DOI: 10.1016/j.rehab.2009.11.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 11/04/2009] [Indexed: 11/25/2022]
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Barrey C, Massourides H, Cotton F, Perrin G, Rode G. Atteinte rachidienne de la neuro-ostéo-arthropathie de Charcot. Neurochirurgie 2009. [DOI: 10.1016/j.neuchi.2009.08.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Agasa B, Bosunga K, Opara A, Tshilumba K, Dupont E, Vertongen F, Cotton F, Gulbis B. Prevalence of sickle cell disease in a northeastern region of the Democratic Republic of Congo: what impact on transfusion policy? Transfus Med 2009; 20:62-5. [PMID: 19712051 DOI: 10.1111/j.1365-3148.2009.00943.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Transfusion therapy may save the lives of patients with sickle cell disease (SCD), but it is also associated with a high risk of transmission of infection. The aims of this study were to determine the prevalence of SCD in a northeastern region of the Democratic Republic of Congo (DRC), and to define ways in which the procedures involved in the security of transfusions should be improved. During a 3-month period in 2006/2007, 520 samples of umbilical cord blood were obtained through neonatal screening in five health centres in Kisangani. The samples were analysed using an isoelectric focusing technique. The estimated prevalence of sickle cell trait and SCD in the population tested was 23.3 and 0.96%, respectively. These numbers will be presented for the attention of the health authorities in DRC with responsibility for SCD and they will be asked to consider improvements in treatment procedures for SCD, such as blood transfusions, as a public health priority.
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Ayéroué J, Kafando E, Kam L, Gué E, Vertongen F, Ferster A, Cotton F, Gulbis B. [Hemoglobin sickle cell disease: experience of the Yalgado Ouedraogo University Hospital of Ouagadougou, Burkina Faso]. Arch Pediatr 2009; 16:316-21. [PMID: 19261452 DOI: 10.1016/j.arcped.2009.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2008] [Revised: 08/26/2008] [Accepted: 01/13/2009] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To evaluate the clinical features of children with hemoglobin sickle cell disease (HbSC) and compare them to children with sickle cell anemia (HbSS). POPULATION AND METHODS This was a descriptive and retrospective study. New patients with sickle cell disease who consulted at the Yalgado Ouédraogo University Hospital's Pediatric Center in Ouagadougou, Burkina Faso, between May 2005 and June 2006, were included. They were free of any major disease unrelated to sickle cell disease. Clinical and laboratory results reported for these children were based on their health book and medical records. RESULTS Sixty-one children were included in the study, 38 and 23 children were positive for HbSC and HbSS, respectively; there was no significant difference between the 2 groups in terms of sex ratio or mean age at inclusion. Mean age at diagnosis was 5 years and 2 years for HbSC and HbSS children, respectively. The first clinical event appeared at a significantly later age for HbSC than HbSS children (4 years versus 2 years). Painful episodes were equivalent in mean number per year and mean length per episode between the 2 groups; the median hemoglobin (Hb) level at inclusion was significantly higher for HbSC than for HbSS children, i.e., 95 g/l versus 70 g/l. CONCLUSION At the Yalgado Ouédraogo University Hospital Pediatric Center, children with HbSC disease presented clinical and biological features very similar to those with HbSS.
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Schmitt C, Cotton F, Gonnaud MP, Berland M, Golfier F, Raudrant D, Dupuis O. Paralysie sciatique transitoire après embolisation de l’artère utérine. ACTA ACUST UNITED AC 2009; 37:70-3. [DOI: 10.1016/j.gyobfe.2008.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2008] [Accepted: 10/17/2008] [Indexed: 10/21/2022]
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Cotton F, Malaviolle X, Vertongen F, Gulbis B. Evaluation of an automated capillary electrophoresis system in the screening for hemoglobinopathies. Clin Lab 2009; 55:217-221. [PMID: 19728555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND The biochemical diagnosis of hemoglobinopathies (thalassemias and hemoglobin (Hb) variants) is based on the separation and the quantification of Hb fractions. HPLC is the most commonly used method but capillary electrophoresis (CE) methods have also been developed successfully. The Capillarys II system is the first fully automated CE system that allows the quantification of Hb A2 and Hb F and the separation of Hb variants. We evaluated the ability of this system to separate and identify Hb variants and to quantify Hb A2 and Hb F. MATERIAL AND METHODS The separation of 18 different Hb variants was studied and the imprecision on migration times was calculated for the three most frequent ones. The total imprecision on Hb A2 and Hb F quantification was determined. The results obtained for 44 patients were compared with those given by HPLC. The interference on Hb A2 measurement due to the presence of Hb S was studied. RESULTS Fourteen out of the 18 variants tested, including all variants of clinical importance, were separated from Hb A. Imprecision on migration times was less than 1%. For Hb A2 quantification, imprecision was less than 3.5% and for Hb F, less than 7.0%. The comparison with HPLC showed an acceptable agreement between both methods but a systematic negative bias for Hb A2 and both proportional and systematic biases for Hb F. No interference from the presence of Hb S on the quantification of Hb A2 was observed. CONCLUSIONS The fully automated Capillarys Hemoglobin method allows the detection and the separation of the most common Hb variants. It provides also a precise, quick, and very easy quantification of Hb F and Hb A2, even in the presence of Hb S. It is very suitable for routine investigation of hemoglopinopathies.
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Gulbis B, Cotton F, Ferster A, Ketelslegers O, Dresse MF, Ronge-Collard E, Minon JM, Le PQ, Vertongen F. Neonatal haemoglobinopathy screening in Belgium. J Clin Pathol 2008; 62:49-52. [DOI: 10.1136/jcp.2008.060517] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kafando E, Nacoulma E, Ouattara Y, Ayeroue J, Cotton F, Sawadogo M, Gulbis B. Neonatal haemoglobinopathy screening in Burkina Faso. J Clin Pathol 2008; 62:39-41. [DOI: 10.1136/jcp.2008.058966] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Guilloton L, Cotton F, Cartalat-Carel S, Jouanneau E, Frappaz D, Honnorat J, Guyotat J. Intérêt de l’IRM, avec séquences de diffusion, de perfusion et de la spectrométrie dans le diagnostic et la surveillance de gliomes d’aspect initial de grade 2 : recherche de marqueurs radiologiques orientant vers une aggravation tumorale de grade. Neurochirurgie 2008; 54:517-28. [DOI: 10.1016/j.neuchi.2008.02.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Accepted: 02/05/2008] [Indexed: 11/29/2022]
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Montoy M, Euvrard T, Moyen B, Roy P, Rollier JC, Cotton F. Inter-observer agreement in the identification of the two bundles of the anterior cruciate ligament using magnetic resonance imaging. Surg Radiol Anat 2008; 30:557-62. [PMID: 18523716 DOI: 10.1007/s00276-008-0370-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Accepted: 05/15/2008] [Indexed: 10/22/2022]
Abstract
BACKGROUND Magnetic resonance imaging has become the method of choice to diagnose meniscal and ligament lesions of the knee. New approaches to the surgical treatment of partial anterior cruciate ligament tears led us to try to distinguish the two bundles of that ligament with MRI and to evaluate inter-observer agreement in different viewing planes. METHODS Images of 50 right and 50 left ligament-intact knees were examined in the coronal and axial viewing planes. Each sequence was independently read by a radiologist and a medical student to note, in each viewing plane, the number of images in which the two-bundle structure of the ligament was clearly seen. Cohen's Kappa coefficients were used to determine inter-observer agreements. RESULTS The percentage of sequences in which the two bundles were distinguished by the radiologist and the student on one image at least were 82 versus 73% in the coronal plane and 90 versus 93% in the axial plane, respectively. The average number of successive images with clear bundles was higher in the axial (2.7 vs. 1.7) than in the coronal plane (2.2 vs. 1). There was a poor inter-observer agreement in the coronal plane (k=0.176) but an intermediate agreement in the axial plane (k=0.385 or 0.522 depending on number pooling). CONCLUSIONS The axial viewing plane seems more favourable to distinguish the two bundles of the anterior cruciate ligament with the best possible reproducibility. An oblique-axial plane is deemed to insure a clearer diagnosis of partial tears.
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Kafando E, Savadogo LGB, Ayéroué J, Nacoulma E, Vertongen F, Ferster A, Cotton F, Gulbis B. [Sickle cell disease: an anonymous survey of physicians in Burkina Faso]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2008; 68:241-246. [PMID: 18689314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The purpose of this survey was to evaluate the experience of physicians in Burkina Faso with haemoglobinopathy (particularly sickle cell disease). Survey findings showed that these pathologies were encountered in daily medical practice but that resources necessary to insure proper prevention, follow-up and treatment were insufficient. Practitioners expressed the need for better continuous medical education and for information campaigns to familiarize the public.
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Tan BK, Saunier CF, Cotton F, Gueugniaud PY, Piriou V. [Thoracoabdominal CT scan: a useful tool for the diagnosis of air embolism during an endoscopic retrograde cholangiopancreatography]. ACTA ACUST UNITED AC 2008; 27:240-3. [PMID: 18313255 DOI: 10.1016/j.annfar.2007.12.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Accepted: 12/19/2007] [Indexed: 02/07/2023]
Abstract
We report the case of an 82-year-old woman treated with biliary stents for an ampulloma of Vater's papilla, with recurrent stenosis of the common bile duct. She was hospitalized with a cholestasis. An endoscopic retrograde cholangiopancreatography (ERCP) was scheduled to change the biliary stent for a metallic one, under general anaesthesia, with oral intubation. The ERCP was performed initially without any complication, but as the metallic biliary stent was placed, an air embolism occurred and a cardiac arrest happened immediately. The etiologic diagnosis was quickly confirmed by an injected multislice body-scan, which showed liver, right heart and brain gas embolism. Cardiopulmonary resuscitation allowed a complete haemodynamic recovery but a poor neurological recovery. The patient was transferred in intensive care unit, were she died 12 days after, despite hyperbaric oxygen therapy and the disappearance of the air embolism on the following computed tomography scan. This case may be useful to recall the utility of a body-scan for the diagnosis, treatment and follow-up of an air embolism during ERCP.
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