1,720,965 research outputs found
Advances and Challenges in Orthopedic Implant-Associated Infections
No full text: The number for orthopedic implants and reconstructive joint replacements, including knee and hip implants, underwent a considerable increase, driven by the aging population and increasing prevalence of musculoskeletal disorders [...]
Chronic critical ischaemia of the lower extremities
No full textThe aim of the present study was to establish the best way to treat chronic critical ischaemia of the lower extremities for limb salvage purposes. The paper presents data on 239 cases observed in elderly patients (over 70) between January 1989 and July 1998. Cases were selected essentially on the basis of the European consensus criteria with due account for the unique clinical features each case may present and which may demand an approach that differs from the guidelines. The patients were surgically treated where possible, the type of procedure being selected on the basis of the specific indications. Patients ineligible for surgery were given conservative treatment. The ultimate aim in all cases was limb salvage and follow-up lasted one year. At one-year follow-up limb salvage had been achieved in 51% of patients given conservative treatment. That figure rose to 71% in patients given femoropopliteal or femeroanterotibial bypasses and to 74% in eases where the bypass was combined with lumbar sympathectomy (L2-L3), whereas the figure among those given lumbar ganglionectomy feel to 59%. Meanwhile limb salvage was achieved in 52% of the profundoplasty cases and 61% of those given thromboendarterectomies. Out of the total surgically treated series, 5 patients had died one year later compared to 4 of those given conservative treatment alone. In these essentially Fontaine Stage III or IV eases, medical treatment alone appears unable to achieve lastingly satisfactory results and was only adopted in patients whose inadequate blood vessels precluded surgery. The results obtained indicate that in critical ischaemia cases direct and/or indirect surgery, where possible, is a valid surgical tactic that can achieve limb salvage
Present-day role of vena cava filters
No full textBackground. The purpose of the present is to assess the effectiveness of pulmonary embolism prevention using temporary or permanent vena cava filters in deep venous thromboses of the lower extremities with a discussion of indications and complications. Methods. In the period between 1989 and 1998 we observed 46 patients (33 m, 13 f) suffering from deep venous thrombosis of the lower extremities. Results. The cases treated with cava filter showed an improvement in clinical conditions in 15-19 cases with 4/19 cases of complications: filter ascent, lipothymia, one case of pneumothorax and one case of filter ascent with thrombosis of the contralateral venous axis. All complications were solved without further sequelae. After catheterisation of the femoral vein, the thrombosis of the contralateral venous axis in patients with caval filter was a frequently observed event (in 75% of cases). In the cases without filter, an evident improvement was observed in 22/27 cases, a slight improvement in 2/27 cases, with 3/27 cases of complications: two cases of cardiocirculatory arrest and one case of severe dyspnea with suspected pulmonary embolism which survived the event. Conclusions. From our experience, the use of caval filters is unquestionably useful for the prevention of pulmonary embolism, but is not wholly free from complications
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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