1,720,958 research outputs found
Acute appendicitis. Update of clinical scores
No full textOBJECTIVES: Evaluate Alvarado Score's (AS) accuracy related with C-reactive protein (CRP). Evaluate the accuracy rate of ultrasonography (US).MATERIALS AND METHODS: We analyzed data on 290 patients admitted to Emergency Department (ED) of Sant'Andrea Hospital (Rome - Italy) presenting abdominal pain in lower quadrants between Jan2009-Apr2015. AS, laboratory tests, images and report from CT-scan and US were collected. Histological examination is considered as Gold Standard. We calculated Specificity(Sp), Sensitivity(Se), Accuracy(Ac), positive predictive value(PPV), and negative predictive value(NPV). We use Exact Fisher Test (EFT) for samples less than 50 units, and Chi square test (chi(2)). CRP were assessed as possible laboratory marker to be added to AS.RESULTS: Two hundred and forty patients (82%) were enrolled following the inclusion criteria. The variations obtained from the AS with C-reactive protein show no difference. CT-scan vs US results show a higher Sp for US despite CT (p= 0.0509 chi(2) =3.803. Se and NPV are higher in CT compared to the US (Se: p=0.000315 chi(2) = 12.88 NVP: p=0.015. We evaluated Ac of US and CT within the individual groups (low(L), Intermediate(I), High(H): L; 37 patients show no statistically significant difference (EFT=1; p>0.05). I: show superiority of CT-scan in Se and NPV (FE:0.0162 p<0.05; FE:0.0432 p<0.05). Regarding H only Se show an acceptable p-value (<0.0021).CONCLUSION: Alvarado score (AS) can be used as the first diagnostic approach in the diagnosis of acute appendicitis (AA). Ultrasound must be considered the first level instrumental examination; necessary and sufficient in low risk patients (0-3 pt) to exclude, with a high reliability rate, the diagnosis of acute appendicitis
Il valore preddittivo della radiografia del torace nella valutazione del rischio chirurgico respiratorio
No full textMalignant peripheral neuroectodermal tumor (MPNET) of the kidney.
No full textBackground: Malignant peripheral neuroectodermal tumors (MPNETs) are primitive neuroblastic tumors that arise, unlike neuroblastomas, outside the autonomic nervous system. A renal origin has been described in very few cases.
Case report: We report the case of a young male patient with a large MPNET of the right kidney, studied with ultrasound and computed tomography before surgical resection. The main radiologic features, the microscopic appearance and the typical immunohistochemical findings, are described and discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Kidney failure during acute pancreatitis. A unique aspect of multiple organ failure
No full textEighty-two patients with acute pancreatis observed in the last seven years were included in prospective trial of monitoring protocol comprising: multiple organ failure and non invasive imaging of pancreatic lesion. One organ failure noted in the 60.9%, M.O.F. with three organ failure represented in the 21.9%. Renal failure was confirmed in 18.9%, trough nine clinical and biological index, become with shock in 73% and with extensive necrosis in 53%. ARF appeared with functional picture and normal diuresis in 73.3% and with organic failure in 26.7%. Index of specific mortality was 33.3%, while the comprehensive index of mortality in the study group was 12.9%, with a significant incidence in the half of deaths
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