1,720,960 research outputs found
Use of Porcine-Derived Dermal Substitutes for Treatment of Nonhealing Vascular Leg Ulcers: A Case Series
No full textNonhealing leg ulcers are a major health problem worldwide with a high economic burden since they require human and material resources. Moreover, nonhealing ulcers are a major nontraumatic cause of lower limb amputations. Dermal substitutes have emerged as an effective therapeutic option for treatment of skin lesions, but data on leg ulcers are scarce. We evaluated safety and efficacy of a porcine-derived dermal substitute in the treatment of chronic vascular leg ulcers. Records of patients with nonhealing ulcers seen at our unit from 2018 to 2019 were retrospectively reviewed. Wound etiology, wound area, and complications were evaluated. Each patient received one application of porcine-derived dermal substitute and was followed-up. Six patients (5 females and 1 male) with a mean age of 61.3 (52-81) years presented with nonhealing leg ulcers. After surgical debridement and wound bed preparation, porcine-derived dermal substitute was applied onto the ulcer. Granulation was satisfactory within 10 days. All wounds healed after an average time of 14 weeks. Graft take was good, and no graft loss, rejection, or associated infection were observed. In conclusion, the data presented indicate that dermal substitutes are safe and effective for treatment of chronic nonhealing vascular leg ulcers
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Role of endovenous laser ablation of great saphenous vein in the management of chronic venous insufficiency. A case series
No full textkoamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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
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