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排序方式: 共有170条查询结果,搜索用时 15 毫秒
1.
Vascularized bone graft pedicled on the volar carpal artery for non-union of the scaphoid 总被引:2,自引:0,他引:2
J N Kuhlmann M Mimoun A Boabighi S Baux 《The Journal of hand surgery, European volume》1987,12(2):203-210
A bone graft, taken from the medial part of the radial epiphysis can be pedicled on the radial branch of the volar carpal arch, freed back to its origin. The graft can be transferred into the proximal row of the carpus to fill up a loss of bony substance or to provide vascularised bone. This permits the treatment of chronic pseud-arthrosis of the scaphoid where a Matti-Russe operation has failed. In the first three cases operated upon, favourable results have been obtained. 相似文献
2.
Ligamentous lesions were created experimentally in 40 fresh cadaver wrists. The precise localization of traumatic rupture of the ligaments and the subsequent carpal imbalance were defined by the comparison between the experimental results and the clinical displacements. The displacements may be permanent, sequential or induced by external forces. Lesions of capsular ligaments cause the displacement. There are 3 functional units; the distal scaphoid complex; the palmar ligaments which form a "belt", consisting of the lateral external ligament, the radiocarpal ligaments an the radiate ligament; the medial ligaments, which also form a "belt" consisting of the palmar triquetral ligaments on each side of the triquetrum. The sprains are caused by a lesion of a functional unit. The lateral sprain is characterized by a lesion of the distal scaphoid complex. The scaphoid moves into a horizontal position, causing a dorsal deviation of the lunate and a scapholunate diastasis. The central sprain is induced by a rupture of the palmar "belt", causing an anteroposterior radiocarpal or mediocarpal drawer movement. The medial sprain is induced by the rupture, of different extents, of the medial ligaments. On examination, there is either a click or a palmar deviation of the lunate, sometimes with a lunotriquetral diastasis. The dislocations of the wrist are caused by lesion of several ligamentous units. 相似文献
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Riccardo Cacocciola Badreddine Ratni Nicolas Mielec Emmanuel Mimoun Shah Nawaz Burokur 《Materials》2022,15(2)
A high-index dielectric radome seam is camouflaged with respect to a low-index dielectric radome panel by tuning the seam with carefully engineered metasurfaces. A transmission-line approach is used to model the metasurface-tuned seam and analytically retrieve the corresponding surface impedance, from which the unit-cell design is then tailored. Full-wave simulations and microwave antenna measurements performed on a proof-of-concept prototype validate the undesired scattering suppression effect in the case of normally and obliquely incident transverse electric and transverse magnetic wave illuminations. Robustness of the proposed solution to fabrication tolerances is also reported. The study presents metasurface-tuning as an easily implementable, frequency adjustable, and polarization insensitive solution to reduce the scattering of dielectric mechanical seams and improve the overall transparency performance of radome structures. 相似文献
6.
Mireille Centlivre Maxime Petit Andrew J. Hutton Mélody Dufossée David Boccara Maurice Mimoun Angèle Soria Béhazine Combadière 《Experimental dermatology》2017,26(10):963-966
Development of new immunotherapeutic strategies relies on the ability to activate the right cells at the right place and at the right moment and on the capacity of these cells to home to the right organ(s). Skin delivery has shown high potency for immunotherapeutic administration. However, an adequate in vivo model of human skin immunity is still a critical bottleneck. We demonstrated here that the skin of human immune system mice is colonized by human hematopoietic cells, mainly human T cells and that complementation with human antigen‐presenting cells at the vaccination site allowed the induction of an immune response. 相似文献
7.
Over the past 40 years or so, a number of models have been proposed to understand the female sexual response. Early, simpler, linear models have evolved to incorporate more sophisticated understanding of the complexity of female sexuality. Updated sexual response models can help therapists in understanding how to help women with various sexual dysfunctions. 相似文献
8.
Zolf R Glacet-Bernard A Benhamou N Mimoun G Coscas G Soubrane G 《Retina (Philadelphia, Pa.)》2002,22(2):192-201
PURPOSE: To classify the preoperative and postoperative optical coherence tomography (OCT) findings for subfoveal choroidal neovascularization (CNV) related to high myopia and multifocal choroiditis (MFC) and to correlate these findings with surgical outcome. METHODS: Ten consecutive patients presenting with subfoveal CNV related to either MFC or degenerative myopia were evaluated. Each patient underwent a biomicroscopic examination, fluorescein and indocyanine green angiographies, as well as OCT before and after surgical removal of CNV. Four different parameters were considered in the analysis of all OCT scans: tissue reflectivity, location of the CNV band, presence or absence of a separation zone, and reflectivity underneath the retinal pigment epithelium (RPE) band. RESULTS: For all six eyes with MFC, OCT showed a hyperreflective band anterior to the RPE with a separation zone and an optically clear zone underneath the RPE. Visual acuity improved in all six eyes. For the degenerative myopia group (4 eyes), OCT revealed findings similar to those observed for MFC for 1 eye, which had a favorable postoperative outcome. The remaining three myopic eyes with different OCT patterns had poor postoperative outcomes. CONCLUSION: Optical coherence tomography can provide preoperative clues for submacular surgery. Eyes with CNV located anterior to and separated from the RPE that have an "optically clear zone" underneath are the best candidates for surgical removal. Such a feature was correlated with a good postoperative outcome. 相似文献
9.
Lentivector-mediated delivery of GDNF protects complex motor functions relevant to human Parkinsonism in a rat lesion model 总被引:4,自引:0,他引:4
Dowd E Monville C Torres EM Wong LF Azzouz M Mazarakis ND Dunnett SB 《The European journal of neuroscience》2005,22(10):2587-2595
Although viral vector-mediated delivery of glial cell-line derived neurotrophic factor (GDNF) to the brain has considerable potential as a neuroprotective strategy in Parkinson's disease (PD), its ability to protect complex motor functions relevant to the human condition has yet to be established. In this study, we used an operant task that assesses the selection, initiation and execution of lateralized nose-pokes in Lister Hooded rats to assess the efficacy with which complex behaviours are protected against neurotoxic lesions by prior injection of a lentiviral vector expressing GDNF. Unilateral injection of 6-hydroxydopamine (6-OHDA) into the medial forebrain bundle (MFB) caused rats to attempt fewer trials and to make more procedural errors. Lesioned rats also developed a pronounced ipsilateral bias, with a corresponding drop in contralateral accuracy. They were also slower to react to contralateral stimuli and to execute movements bilaterally. Rats that were pre-treated 4 weeks prior to lesion surgery with an equine infectious anaemia virus (EIAV) vector carrying GDNF [EIAV-GDNF, injected into the striatum and above the substantia nigra (SN)] performed significantly better on all of these parameters than control rats. In addition to the operant task, EIAV-GDNF successfully rescued contralateral impairments in the corridor, staircase, stepping and cylinder tasks, and prevented drug-induced rotational asymmetry. This study confirms that GDNF can protect against 6-OHDA-induced impairments in complex as well as simple behaviours, and reinforces the use of EIAV-based vectors for the treatment of PD. 相似文献
10.
Teng Q Garrity-Moses M Federici T Tanase D Liu JK Mazarakis ND Azzouz M Walmsley LE Carlton E Boulis NM 《Neurobiology of disease》2005,20(3):473-700
The present study examines gene delivery to cultured motor neurons (MNs) with the Rabies G protein (RabG)-pseudotyped lentiviral equine infectious anemia virus (RabG.EIAV) vector. RabG.EIAV-mediated beta-galactosidase (RabG.EIAV-LacZ) gene expression in cultured MNs plateaus 120 h after infection. The rate and percent of gene expression observed are titer-dependent (P < 0.001). The rat IGF-I cDNA sequence was then cloned into a RabG.EIAV vector (RabG.EIAV-IGF-I) and was shown to induce IGF-I expression in HEK 293 cells. MNs infected with RabG.EIAV-IGF-I demonstrate enhanced survival compared to MNs infected with RabG.EIAV-LacZ virus (P < 0.01). In addition, IGF-I expression in cultured MNs induced profound MN axonal elongation compared to control virus (P < 0.01). The enhanced motor neuron tropism of RabG.EIAV previously demonstrated in vivo, together with the trophic effects of RabG.EIAV-IGF-I MN gene expression may lend this vector to therapeutic application in motor neuron disease. 相似文献