1,720,976 research outputs found
New endoscopic technique for intragastric balloon removal
No full textBACKGROUND: Placement and removal of the intragastric balloon for obesity are performed endoscopically often under general anesthesia. We propose a safer and faster technique for endoscopic removal of the intragastric balloon using standard sedation. METHODS: In 87 obese patients, we performed 3 removal techniques: 1) standard gastroscope and foreign body forceps, 2) standard gastroscope and retrieval snare, 3) double-channel gastroscope and foreign body forceps plus symmetrical "shark model" polypectomy snare. Balloon retrieval time, number of times the grasping devices lost the balloon, amount of antispasmodic drug, symptoms cumulative score and VAS score for discomfort were evaluated. RESULTS: The technique by double-channel gastroscope and foreign body forceps plus symmetrical polypectomy shark retrieval snare showed a significantly lower balloon retrieval time, number of lost balloons, total number of ampoules used, symptoms cumulative score and VAS score compared to the other two techniques (Dunn's P<0.05). Number of lost balloons was positively associated with number of antispasmodic ampoules used, balloon retrieval time and VAS score. CONCLUSIONS: Technique by double-channel gastroscope and foreign body forceps plus symmetrical polypectomy shark retrieval snare, allows balloon removal safely, quickly and easily, avoiding loss of the balloon, with good patient endurance
Which stent stenosis of the esophagus which [Quale stent in quale stenosi dell'esofago].
No full textSelf expandable esophageal prosthesis
today represent an effective palliative
treatment in esophageal cancer and
in cases of stenosis or fistula into the
trachea or in the mediastinum, with a
limited number of complications. Covered
metal ones are preferable, while the
plastic stents present a more difficult
position and higher incidence
of migration. Results in benign stenosis
are less successful: their use is
recommended only in selected cases.
Further long-term prospective data are
awaited before biodegradable stents can
be recommended for the management
of benign esophageal lesions
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
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