Search results for "Hume"
showing 10 items of 132 documents
Morphomechanics of the humero-ulnar joint: I. Joint space width and contact areas as a function of load and flexion angle
1995
BACKGROUND Previous studies have shown that the trochlear notch is deeper than necessary for an exact fit with the humerus. However, humero-ulnar joint space width and contact areas have so far not been quantified for variations in the load and angle of flexion. METHODS Six fresh cadaveric specimens were investigated at 30 degrees, 60 degrees, 90 degrees, and 120 degrees of flexion and at loads of 25 and 500 N, simulating resisted elbow extension. The joint space width and contact were determined, using polyether casting material. RESULTS At 25 N all joints made contact in the ventral and dorsal aspects of the articular surfaces, whereas in the depth of the trochlear notch the joint space w…
Optimal positioning of the humeral component in the reverse shoulder prosthesis.
2014
Total reverse shoulder arthroplasty is becoming more and more the standard therapeutic practice for glenohumeral arthropathy with massive lesions of the rotator cuff. The biomechanical principle of this prosthesis is represented by the reversion of the normal anatomy of the shoulder joint. This non-anatomical prosthesis leads to a medialization of the rotation centre of the glenohumeral joint and also to a distalization of the humeral head. All that causes a deltoid tension increasing so allowing a larger abduction of the arm. Main complications of the reverse shoulder prosthesis are due to the joint instability, the scapular notching and the wear of the polyethylene insert. The main goal o…
MR-Tomographie versus CT-Arthrographie bei glenohumeralen Instabilitäten
1992
In a prospective study the diagnostic value of MRI compared to CT arthrography (CT-A) was evaluated in 26 patients with 27 instable shoulder joints. Surgical and/or arthroscopic correlation was available in all cases. Both methods showed a high accuracy (96% CT-A, 94% MRI) in the evaluation of the glenoid labrum. CT-A was significantly superior to MRI in the detection of capsular lesions (sensitivity 96% vs. 44%, accuracy 96% vs. 72%, negative predictive value 96% vs. 67%). CT-A and MRI results regarding humeral head fractures were similar; fractures of the glenoid rim were better detected by CT-A, the difference, however, was statistically not significant. Overall, CT-A proved to be superi…
Primäre Ellenbogenprothese bei distalen Humerustrümmerfrakturen
2004
The use of hip- and shoulder arthroplasty in elderly patients for grossly displaced intraarticular fractures is being more and more accepted. Total elbow replacement (TER) has not been considered as an option for the treatment of extensively comminuted fractures of the distal humerus because surgeons feel the outcome is not predictable after TER generally. On the basis of a Medline literature research of this issue and the documented results based on the improvement of the designs of the implants, operative technique and the selection of patients, TER has a definite role in the treatment of some fractures of the distal humerus. We retrospectively reviewed forty-nine acute distal humeral fra…
MRI findings and evoked potentials in patients with myotonic dystrophy versus facioscapulohumeral dystrophy
1997
Evoked potentials recordings have been applied to many neurological disorders, localizing the lesions in the central nervous system (CNS) pathways. Facioscapulohumeral muscular dystrophy (FSHD) is a slowly progressive degenerative disease involving the muscles of the face and shoulders. On the contrary, myotonic distrophy (MD), the most frequent and severe myotonic disease, is caracterized by myotonia (delay of relaxation after voluntary contraction), muscular atrophy and dystrophic changes in non-muscular tissues. In the present investigation, patients with clinically and electromyographically verified FSHD and MD were examined using somatosensory evoked potentials (SEP) and brainstem aud…
Total Elbow Replacement as Primary Treatment for Complex Fractures of the Distal Osteopenic Humerus
2003
Background: The use of hip and shoulder arthroplasty in elderly patients for grossly displaced intraarticular fractures is becoming more and more accepted. Total elbow replacement (TER) has not been considered an option for the treatment of extensively comminuted fractures of the distal humerus because surgeons feel the outcome is generally not predictable after TER. Evaluation of TER: On the basis of a MEDLINE literature search of this issue and the documented results based on the improvement of implant designs, operative technique and patient selection, TER has a definite role in the treatment of some fractures of the distal humerus.
Aston Medical Duocentric® Reversed Prosthesis: Proposition of New Glenoid Component Design to Prevent Scapular Neck Notching
2015
Medialization of the center of rotation in reverse shoulder arthroplasty (RSA) results in greater excursion of the proximal humerus especially in adduction leading to a mechanical conflict against the neck of the scapula, thus creating a specific complication: scapular notching, in up to 90 % of RSA. We describe our third generation of RSA in Dijon, the Duocentric prosthesis. This prosthesis provides a new proposition to prevent the notching problem with an inferior overhang integrated to the glenoid baseplate. Such an inferior extension prevents the malpositioning of the hemisphere and resurfaces the “critical zone” preventing notching.Phenomenon while a smaller neck-shaft angle on the hum…
Distal Humerus Fractures
2014
Distal humerus fractures display seldom but severe injuries because of the complex distal humerus anatomy and often comminuted fracture types. They account for approximately 2–3 % of all fractures and for 17–30 % of fractures around the elbow. In younger patients, there is a predominance among males. The mechanism of accident is mostly a high-energy trauma in this population. In contrast, among elderly patients, distal humerus fractures concern mostly women with osteoporotic bone. Fractures are caused by a low-energy trauma such as a fall from standing height onto the outstretched or slightly flexed arm. These fractures are often severely comminuted. Because of the thin soft tissue envelope…
Conectividad dinámica y vulnerabilidad de los ecosistemas acuáticos en entornos agrícolas costeros: La Albufera de Valencia como caso de estudio
2023
Los humedales costeros, considerados indispensables por los numerosos servicios ecosistémicos que proporcionan a la humanidad, se encuentran en la actualidad altamente amenazados por las continuas presiones antrópicas, y en especial, por la actividad agrícola. Entre los principales impactos derivados de la agricultura destacan la extracción de las reservas de agua dulce, la alteración de los regímenes hidrológicos naturales, y la degradación de la calidad química y estado trófico de los ecosistemas acuáticos naturales que constituyen estos complejos y dinámicos parajes naturales. El principal problema a la hora de desarrollar y aplicar estrategias de monitorización, conservación y restaurac…
Quand notre intestin parle à notre cerveau...
2017
Trois scientifiques interviendront une dizaine de minutes chacun sur les thèmes suivants : • Intestin et humeur, ou les relations entre microbiote, stress et dépression, par le professeur Pierre Déchelotte (CHU de Rouen). • Intestin et maladies métaboliques (obésité, diabète) : l’influence des hormones, par le professeur Claude Knauf (Université de Toulouse) • Intestin et comportement alimentaire : l’influence des nutriments sur les sensations de faim et de satiété, par le docteur Gilles Mithieux (Inserm, Lyon). Suivront 30 à 60 minutes de questions – réponses avec le public.