153 research outputs found
Prise en charge tardive des sequelles de fractures du plancher orbitaire
Introduction : Les fractures du plancher orbitaire, sont devenues une pathologie assez fréquente étant donné, l’augmentation du nombre d’accidents de la route. Le plancher orbitaire de part sa constitution anatomique est certainement le maillon faible du cadre orbitaire. Observation : Nous présentons le cas d’un jeune de 35 ans polytraumatisé avec des séquelles de fracture du plancher orbitaire qui ne sera opéré que deux années plus tard, priorité chirurgicale oblige ( le rachis étant opéré en premier) avec les risques certains d’échec de la chirurgie ophtalmologique. Discussion : Les séquelles de ce type de fracture sont exposées, ainsi que les différentes modalités thérapeutiques. L’enophtalmie, la diplopie, les anomalies osseuses et palpébrales constituent autant de séquelles parfois difficiles à prendre en charge. Les voies d’abord chirurgical sont discutées ; l’usage de matériaux tels les implants en hydroxyapatite également. Conclusion : Le traitement des fractures du plancher de l’orbite est actuellement bien codifié et doit toujours être tenté même des années après le traumatisme causal.Mots clés : fracture plancher orbitaire, diplopi
Améloblastome mandibulaire place de la radiothérapie
L’améloblastome est la tumeur odontogénique la plus fréquente. il représente 1% des tumeurs mandibulaires et maxillaires et atteint la mandibule dans 80% des cas. Son traitement se base essentiellement sur la chirurgie lorsque cela est possible. La radiothérapie est réservée aux formes inopérables localement évoluées et métastatiques. Les auteurs rapportent le cas d’un patient présentant un améloblastome mandibulaire kystique traité par radiothérapie exclusive.Mots clés: Améloblastome, mandibule, radiothérapi
Seasonal variation of heavy metals (Cd, Pb and Hg) in sediments and in mullet, Mugil cephalus (Mugilidae), from the Ghar El Melh Lagoon (Tunisia)
1 - This study investigates the toxic contaminants cadmium (Cd), lead (Pb) and mercury (Hg) in surface sediments and in the fish species Mugil cephalus of the lagoon of Ghar El Melh (GEM), Tunisia.
2 - Sampling was conducted seasonally during 2003 and 2004. The results of this study indicated that levels of Cd and Pb varied in sediment from 0.4 to 0.9µgg-1dw and 25 to 70µgg-1dw, respectively. Mercury concentrations in sediment were generally below 1µgg-1dw. The highest level was observed in the north-east of lagoon. In fish muscle, concentrations of Cd, Pb and Hg varied between 0.013 to 0.025µgg-1dw, 0.048 to 0.422µgg-1dw and 0.222 to 0.409µgg-1dw, respectively.
3 - Results of heavy metal analyses in sediment and fish indicated that there were relatively metal contamination problems in GEM lagoon near the harbour due to the anthropogenic activities, notably from the Medjerda River and wastewater from the coastal towns around the lagoon
Manifestations Ophtalmologiques Au Cours Du Syndrome D\'apert : A Propos D\'un Cas
Introduction : Parmi les crâniosténoses, le syndrome d\'Apert demande la collaboration de plusieurs spécialistes, pour sauver ce qui peut l\'être de la fonction visuelle des patients et permettre un développement cérébral le plus proche de la normale.
Observation : Nous présentons le cas d\'une jeune suivie et traitée depuis son jeune âge pour un syndrome d\'Apert. Elle a subi plusieurs interventions successives pour garder à un âge assez avancé une fonction visuelle appréciable à 3/10.Les modifications anatomiques ont inéluctablement influé sur l\'état visuel de la patiente avec une myopie forte,un
astigmatisme relativement important et une atrophie papillaire partielle. Discussion : D\'origine génétique, le syndrome d\'Apert est dû à une mutation allélique du récepteur 2 d\'un facteur fibroblastique. Les signes de souffrance cérébrale sont inévitables, et l\'atrophie optique relative représente la séquelle fonctionnelle principale. Conclusion : Une prise en charge de longue haleine est nécessaire dans le syndrome d\'Apert pour espérer sauver une
fonction visuelle utile.Introduction : Several craniosynostotic syndromes are described such as Apert syndrome in which collaboration between different specialists is necessary to preserve visual function and to allow normal cerebral development. Case-report : It\'s a case note of a girl with Apert syndrome. She underwent since her infancy several surgical operations. Anatomic modifications affected her visual status with a best visual acuity of 3/1O, high myopia, astigmatism and partial optic atrophy. Discussion : Apert syndrome is a genetic disorder due to a mutation in fibroblast receptor growth factor genes. Optic
atrophy attributed to optic neuropathy represents the major functional sequella and the major cause of visual loss. Conclusion : Apert syndrome, like all craniosynostotic syndromes, requires a correct management in order to preserve the visual function. Keywords: craniosynostosis, Apert syndrome, decompression surgery, optic atrophy. Journal Tunisien d\'ORL et de chirurgie cervico-faciale Vol. 18 2007: pp. 46-4
In-plane anisotropy of electrical transport in YTbBaCuO films
We fabricate high-quality c-axis oriented epitaxial YBaCuO
films with 15% of yttrium atoms replaced by terbium (YTBCO) and study their
electrical properties. The Tb substitution reduces the charge carrier density
resulting in increased resistivity and decreased critical current density
compared to the pure YBaCuO films. The electrical properties of
the YTBCO films show an in-plane anisotropy in both the superconducting and
normal state providing evidence for the twin-free film. Unexpectedly, the
resistive transition of the bridges also demonstrates the in-plane anisotropy
that can be explained within the framework of Tinkham's model of the resistive
transition and the Berezinskii-Kosterlitz-Thouless (BKT) model depending on the
sample parameters. We consider YTBCO films to be a promising platform for both
the fundamental research on the BKT transition in the cuprate superconductors
and for the fabrication of devices with high kinetic inductance
Water resource management for sustainable development
Water resource management is the cornerstone for sustainable
development. According to the United Nations world water
development report, one-fifth of the world?s population lives
in areas characterized by physical water scarcity.info:eu-repo/semantics/publishedVersio
Downregulation of CYP17A1 by 20-hydroxyecdysone: plasma progesterone and its vasodilatory properties
Aim: To investigate the effect of 20-hydroxyecdysone on steroidogenic pathway genes and plasma progesterone, and its potential impact on vascular functions. Methods: Chimeric mice with humanized liver were treated with 20-hydroxyecdysone for 3 days, and hepatic steroidogenic pathway genes and plasma progesterone were measured by transcriptomics and GC–MS/MS, respectively. Direct effects on muscle and mesenteric arterioles were assessed by myography. Results: CYP17A1 was downregulated in 20-hydroxyecdysone-treated mice compared with untreated group (p = 0.04), with an insignificant increase in plasma progesterone. Progesterone caused vasorelaxation which was blocked by 60 mM KCl, but unaffected by nitric oxide synthase inhibition. Conclusion: In the short term, 20-hydroxyecdysone mediates CYP17A1 downregulation without a significant increase in plasma progesterone, which has a vasodilatory effect involving inhibition of voltage-dependent calcium channels, and the potential to enhance 20-hydroxyecdysone vasorelaxation
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Development of uranium reference particles to support nuclear safeguards
Stenosis and Aneurysm of Coronary Arteries in A Patient with Behcet’s Disease
Coronary artery disease is extremely rare in patients with Behçet’s disease. We report the case of a patient with a history of Behçet’s disease who was admitted in our hospital with instable angina pectoris. The patient’s electrocardiogram was normal. Coronary angiography revealed aneurysm of the distal right coronary artery with a tight stenosis of the proximal part of the posterolateral branch. These two conditions were initially treated with immunosuppressive treatment. Three years later coronary angiography showed a total occlusion of the right coronary artery treated with medical therapy. More than fourteen cases of coronary involvement were reported in the literature but the etiopathogeny and the treatment are yet unknow
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