1,721,026 research outputs found
Modified surgical technique for autologous conjunctival transplantation after corneal alkali burn [Modifizierte Technik zur Autologen Bindehauttransplantation nach Hornhautveratzung]
No full textBackground A modified conjunctival plastic for the treatment of unilateral alkali burn in presented. This procedure is aimed at both reconstructing the limbal region while eliminating the symblephara, thus allowing free ocular motility and partial recovery of corneal transparency.Patients and Methods Two patients suffering from unilateral alkali burn underwent a conjunctival plastic according to a technique modified from Kenyon. Preoperatively, both patients exhibited a fully vascularized. scarred cornea as well as extensive symblephara. By transplanting both limbal and bulbar autologous conjunctiva from the healthy eve to the injured one, it was possible in the two cases to reestablish the limbal and fornix anatomy.Results Postoperatively, free bulbar motility was achieved in both cases, while vision improved substantially only in the adult, not amblyopic patient who could obtain an uncorrected visual acuity of 0.05.Conclusion The modified conjunctival plastic employed in the two case...Background: A modified conjunctival plastic for the treatment of unilateral alkali burn is presented. This procedure is aimed at both reconstructing the limbal region while eliminating the symblephara, thus allowing free ocular motility and partial recovery of corneal transparency. Patients and Methods: Two patients suffering from unilateral alkali burn underwent a conjunctival plastic according to a technique modified from Kenyon. Preoperatively, both patients exhibited a fully vascularized, scarred cornea as well as extensive symblephara. By transplanting both limbal and bulbar autologous conjunctiva from the healthy eye to the injured one, it was possible in the two cases to reestablish the limbal and fornix anatomy. Results: Postoperatively, free bulbar motility was achieved in both cases, while vision improved substantially only in the adult, not amblyopic patient who could obtain an uncorrected visual acuity of 0.05. Conclusion: The modified conjunctival plastic employed in the two cases reported herein led to excellent anatomic results while allowing partial recovery of corneal transparency and improvement of vision
The use of coralline hydroxyapatite implants for eye replacement after enucleation
No full textBackground: During the last two decades, hydroxyapatite has become popular as alloplastic material for bone replacement in orthopedic and dental surgery. We investigated prospectively the feasibility of hydroxyapatite spheres as replacement of enucleated eyes. Patients and Methods: Thirty-three consecutive patients entered a prospective study designed to evaluate the results obtained after either primary (n = 26) or secondary (n = 7) implantation of a hydroxyapatite sphere as replacement of the enucleated eyeball. Each patient was examined preoperatively, 1, 2, and 4 months after surgery, as well as every 6 months thereafter. At each examination time the motility of both coralline sphere and overlying cosmetic prothesis was evaluated and the conjunctival sac was carefully examined at the slit-lamp. Results: The postoperative follow-up averaged 10.5 months for the primary implantations and 7.2 months for the secondary implantations. Two implants had to be removed because of infection unresponsive to antibiotic treatment. Defects in the conjunctiva overlying the implant necessitated wound revision in two cases. A buccal mucosal graft was performed in two additional ones. A temporary cosmetic prothesis could be fitted in all but two of the remaining patients as early as 3 weeks after surgery. Motility of at least 3 mm in all directions could be obtained in 31 cases. Conclusion: Our study demonstrated that satisfactory motility and good biocompatibility can be achieved, at least in the medium term, with implantation of coralline hydroxyapatite spheres
Systems modelling and simulation in health service design, delivery and decision making
No full textThe ever increasing pressures to ensure the most efficient and effective use of limited health service resources will, over time, encourage policy makers to turn to system modelling solutions. Such techniques have been available for decades, but despite ample research which demonstrates potential, their application in health services to date is limited. This article surveys the breadth of approaches available to support delivery and design across many areas and levels of healthcare planning. A case study in emergency stroke care is presented as an exemplar of an impactful application of health system modelling. This is followed by a discussion of the key issues surrounding the application of these methods in health, what barriers need to be overcome to ensure more effective implementation, as well as likely developments in the futur
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
koamabayili/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
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