21 research outputs found
Resuming elective orthopaedic surgery during the COVID-19 pandemic : guidelines developed by the International Consensus Group (ICM)
Omnivoria e repartição de recursos em águas pobres em nutrientes da Bacia do Rio Negro
Amazonian biodiversity is notorious, this is also valid for the fauna of the mineral-deficient waters of the Rio Negro System. Some 25 years of research on the benthic fauna of Central Amazonian streams resulted in species-rich foodwebs with a high degree of omnivory within dense animal communities. To exemplify the taxonomic range of omnivorous consumers, the detailed resource spectra of 18 consumer species, including Protozoa (2 species), Platyhelminthes (1 species), insects (2 species), fish (6 species) and shrimps (Decapoda, 7 species), associated primarily with the benthic habitats of Rio Negro tributaries, are presented. Special features of omnivory are characterized, and the importance of litter-decomposing fungi as essential energy input into the foodwebs is documented. It is shown that general omnivory -diverse omnivore consumers sharing most of the resource types- is a prevalent feature. The relevance of this general omnivory for the maintenance of biodiversity is discussed.A biodiversidade do Amazonas Ă© notĂłrio e isto tambĂ©m Ă© válido para as águas pobres em nutrientes da bacia do Rio Negro. Uma pesquisa de 25 anos da fauna bĂ©ntica de igarapĂ©s da AmazĂ´nia Central resultou em redes alimentares caraterizadas por alta diversidade de espĂ©cies, por intensa omnivoria e por alta densidade populacional. Para demonstrar a generalidade taxonĂ´mica de omnivoria no bentos dos igarapĂ©s, sĂŁo apresentados as listas de presas / recursos de 18 espĂ©cies de consumidores, sendo Protozoa (2 epĂ©cies), Platyhelminthes (1 espĂ©cie), insetos (2 espĂ©cies), peixes (6 espĂ©cies) e camarões (Decapoda, 7 espĂ©cies). Diferentes categorias de omnivoria sĂŁo apresentados, e a importância de fungos decompositores da liteira submersa como input básico de energia nas redes alimentares Ă© demonstrada. É prevalente a omnivoria geral, sendo que as diferentes espĂ©cies omnĂvoros estĂŁo utilizando os mesmos recursos. Considera- se a relevância desta omnivoria geral para a manutenção da biodiversidade
A Contribution to the Construct Validity of the Tennessee Self-Concept Scale: A Confirmatory Factor Analysis
Anatomic Versus Mechanically Aligned Total Knee Arthroplasty for Unicompartmental Knee Arthroplasty Revision
Personalized image-based templates for precise acetabular prosthesis placement in total hip arthroplasty: a pilot study
Objective: In order to achieve accurate implantation of the acetabular prosthesis in total hip arthroplasty (THA), we designed individual templates based on a three-dimensional (3D) model generated from computed tomography (CT) scans. Methods: Individual templates were designed for 12 patients who underwent THA. A physical template was designed to conform to the contours of the patient’s acetabulum and to confirm the rotation of the acetabular center. This guided the acetabular component orientation. Results: The preoperative and postoperative X-ray and CT scans were obtained to assess the location with respect to the accuracy of the acetabular component. For all patients, the abduction angle of the acetabular component was 46.7° to 54.3° and the anteversion angle was 11.3° to 18.5°. Conclusions: The assessment of postoperative CT scans demonstrated higher accuracy of the acetabular component bore when used with the individual template. Therefore, the individual template can be an alternative to the computer-assisted navigation systems, with a good cost-performance ratio