1,721,000 research outputs found
Delayed right-sided diaphragmatic rupture and laparoscopic repair with mesh fixation
No full textDiaphragmatic rupture is usually an immediate, left-sided complication of high-velocity thoraco-abdominal trauma. Here we present a rare case of delayed, right-sided diaphragmatic rupture and its laparoscopic mesh repair
METABOLIC DISORDERS, NON-ALCOHOLIC FATTY LIVER DISEASE AND MAJOR LIVER RESECTION: AN UNDERESTIMATED PERIOPERATIVE RISK.
No full textBackground
Despite increasing evidence of an association of Metabolic Syndrome (MS) and liver degeneration (Non-Alcoholic Fatty Liver Disease), little is known about the results of major hepatic resection in patients with multiple metabolic disorders.
Aims
To quantify and analyze the perioperative mortality in patients presenting isolated metabolic disorders.
Methods
A retrospective analysis of immediate outcome was performed of patients undergoing right hepatectomy and concomitantly affected by two or more metabolic disorders (including diabetes mellitus, arterial hypertension, dyslipidemia and obesity/overweight) without any other known cause of liver disease from January 2001 to May 2010.
Results
Among the 151 patients undergoing right hepatectomy, 30 patients presented the association of two or more metabolic disorders. Perioperative mortality in this group reached 30% (nine patients). In patients presenting MS (3 or more disorders), the mortality reached 54%. Univariate analysis identified four criteria associated with poor prognosis: MS, perioperative bleeding ≥ 1000mL, middle hepatic vein resection and underlying primary hepatic malignancy. At multivariate analysis, middle hepatic vein resection and underlying primary hepatic malignancy resulted as being independently related to mortality.
Conclusions
Patients presenting with multiple metabolic disorders should be carefully evaluated before major liver resection, especially when the procedure is planned for hepatocellular carcinoma and when a middle hepatic vein resection is required
A rare case of appendicitis-like syndrome: Prompt laparoscopic diagnosis and management
No full textBackground
Torsion/necrosis of peduncolated tumors represent a rare cause of acute abdomen, potentially mimicking other conditions, such as acute appencitis. Owing to rarity, symptoms’ aspecificity and difficult interpretation of imagery, diagnosis is difficult to achieve preoperatively and surgery may be challenging. Laparoscopy has been proposed in recent years for diagnosis/management of several conditions in an emergency setting.
Objectives
To describe a case of a patient affected by an ischemic ileal hemangioma mimicking an acute appendicitis and managed laparoscopically.
Case report
A 16-y-old boy was admitted with an appendicitis-like syndrome (hyperpyrexia, right iliac fossa pain and tenderness). Peri-operative CT scan showed a 3-cm-image which was interpreted as a peri-appendicular abscess. At laparoscopy, a twisted, ischemic mass adherent to the surrounding ileum, was found and removed. Outcome was uneventful. Pathology showed a benign hemangioma of the ileal mesentery. This is the first case treated by laparoscopic resection (video).
Conclusion
Laparoscopy allowed achieving a diagnosis and performing the appropriate treatment, without the need of a second laparotomy. Rare causes of acute abdomen represent an argument in favor of a laparoscopic approach to patients with suspected acute appendicitis
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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