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304 results on '"Nizard, R."'

9. Isolated Volar Dislocation of the Distal Radioulnar Joint: A Case Report

Author

Dukan, Ruben, Hassan, S Kassab, Delvaque, J G, Khaled, I, and Nizard, R

Subjects
Volar dislocation, distal radioulnar joint, closed reduction, Case Report
Abstract

Introduction: Isolated dislocation of the distal radioulnar joint (DRUJ) is a rare phenomenon. Approximately 50% of isolated DRUJ dislocations are undiagnosed or diagnosed late with significant functional consequences. This clinical injury is rarely described in the literature and management is not well established. We reported a case of volar DRUJ dislocation early diagnosed. Case Report: A 36-year-old man was diagnosed with an isolated volar dislocation of the DRUJ. The clinical examination, X-rays, and computed tomography scan allowed an early diagnosis. A reduction by external maneuvers was performed and the patient was immobilized in an above elbow plaster cast for 6 weeks. Magnetic resonance imaging did not reveal any capsuloligamentous lesions requiring surgery. Evolution was favorable. Conclusion: Isolated volar dislocation of the DRUJ is an uncommon injury which can be easily missed. Missed or late diagnosis may lead to significant morbidity. Early diagnosis and treatment of such injuries usually results in excellent functional recovery.

Published
2020

11. Contribution of Statistical Iterative Reconstruction Algorithm For Orthopaedic Applications: A Study With A Cone-Beam CT Prototype

Author

Bernard G, Uk S, Nizard R, Morin F, Bousson, and Chappard C

Subjects
Computer science, Iterative reconstruction, Algorithm, Cone beam ct
Abstract

Three-dimensional reconstruction for image-guidance in orthopaedic surgery necessitates a high degree of geometrical precision but not necessary structure details. With the aim to reduce as much as possible the dose, a cone beam CT prototype was tested with decreasing intensities, the number of projections or different angular range. We tested two methods of reconstruction: classical Feldkamp-Davis-Kress (FDK) reconstruction and the Simultaneous Algebraic Reconstruction Technic with Total Variation (SART-TV). Based on this protocol, on a knee cadaveric specimen, we combined qualitative assessment performed by radiologists and orthopedic surgeons, objective metrics of image quality such as signal-to-noise ratio, or related to bone geometric contour, grey level restitution and texture of trabecular bone, and finally the quality of joint space segmentation. Objective indicators related to signal-to-noise ratio, the quality of geometry and segmentation have shown better results for SART-TV than FDK in case of decrease projections number and angular range. On the contrary, qualitative assessment, and indexes about grey level restitution and textural quality of trabecular bone produced the best results for FDK reconstruction. These results showed that SART-TV reconstruction has a good capability to restore the geometry in case of low dose protocol and consequently could be a good candidate for orthopaedic surgery.

Published
2021

15. Éducation et rééducation avant prothèse totale de genou pour gonarthrose (EDEX) : essai randomisé contrôlé

Author

Zalc, J., primary, Bouton, I., additional, Roren, A., additional, Sanchez, K., additional, Perrodeau, E., additional, Durand-Zaleski, I., additional, Anract, P., additional, Biau, D., additional, Nizard, R., additional, Boisgard, S., additional, Daste, C., additional, Gil, C., additional, Eschalier, B., additional, Beaudreuil, J., additional, Lefevre-Colau, M.M., additional, Poiraudeau, S., additional, Coudeyre, E., additional, Rannou, F., additional, and Nguyen, C., additional

Published
2020
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19. Impact of preoperative maintenance or interruption of aspirin on thrombotic and bleeding events after elective non-cardiac surgery: the multicentre, randomized, blinded, placebo-controlled, STRATAGEM trial†

Author

Mantz, J., Samama, C. M., Tubach, F., Devereaux, P. J., Collet, J.-P., Albaladejo, P., Cholley, B., Nizard, R., Barré, J., Piriou, V., Poirier, N., Mignon, A., Schlumberger, S., Longrois, D., Aubrun, F., Farèse, M. E., Ravaud, P., and Steg, P. G.

Published
2011
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