1,720,993 research outputs found
Roptured aortic aneurysm presenting as acute abdomen: particular case report
No full textAim: Ruptured aortic aneurysm can be tt atusc of acute abdomen. Nowadays using modern diagnostic techniques diagnosis is very easy. W'e report a particular can' of a misdiagnosed ruptured aortic aneurysm. (!ase Report: Man 65 y.o. admitted to hospital for abdominal pain and stipsis. After I week he developed acute abdomen with muscotar rigidity and mild acute anemia, hew days before contrast studies showed a sigmoid diverticular disease. At laparotomy a ruptured aortic aneurysm seated from retroperitoneal fascia and extended to abdomi na! walls up to rectus abdominis muscles tons found. Conclusions: In case of acute abdomen with muscolar rigidity and acute anemia the diagnosis of rectus abdominis muscles hematoma caused by ruptured aortic aneurysm must be considere
[Ruptured aortic aneurysm presenting as acute abdomen: particular case report]
No full textAIM
Ruptured aortic aneurysm can be a cause of acute abdomen. Nowadays using modern diagnostic techniques diagnosis is very easy. We report a particular case of a misdiagnosed ruptured aortic aneurysm.
CASE REPORT
Man 65 y.o. admitted to hospital for abdominal pain and stipsis. After 1 week he developed acute abdomen with muscular rigidity and mild acute anemia. Few days before contrast studies showed a sigmoid diverticular disease. At laparotomy a ruptured aortic aneurysm sealed from retroperitoneal fascia and extended to abdominal walls up to rectus abdominis muscles was found.
CONCLUSIONS
In case of acute abdomen with muscular rigidity and acute anemia the diagnosis of rectus abdominis muscles hematoma caused by ruptured aortic aneurysm must be considered
Prospective analysis of 101 consecutive cases of laparoscopic cholecystectomy for acute cholecystitis operated with harmonic scalpel
No full textBackground: Videolaparocholecystectomy (VLC) for acute cholecystitis (AC) is a technically demanding procedure, feasible by experienced surgeons, still affected by high conversion rate. Aim of this study was to prospectively evaluate whether the use of harmonic scalpel (HA) during VLC for AC, allowing a potentially better hemostasis and biliostasis, can decrease the conversion rate. Methods: Hundred and one patients, with the mean age of 61.2±8.2 years (range: 39 to 81 y), admitted for AC, have been submitted to early VLC with HA within 6 years (from January 1, 2003 to December 31, 2008) at the Department of General, Emergency, and Transplant Surgery of St Orsola-MalpighiUniversity Hospital in Bologna, Italy. The design of the study was prospective observational non-randomized. The control group consisted of 100 patients who underwent VLC for AC without HA at the same department in the same period. Results: Mean operative time in VLC group with HA has been 71.4±14.3 minutes (range: 42 to 112 min) versus 87.4±10.8 minutes in the control group (P<0.001). Blood losses were significantly lower with the use of HA. Conversion rate has been 4.9%, mortality was 1%, and postoperative morbidity 7.9% in HA treated group, versus 12% conversion rate, 1% and 9% mortality and morbidity, respectively in the control group (P value not significant). Conclusions: The use of HA seems to be associated with lower conversion rate in VLC for AC, without any significant increase of morbidity. HA might be even more useful in the most technically demanding cases but further investigations are required. A prospective randomized trial comparing harmonic versus monopolar diathermy in laparoscopic cholecystectomy for AC in adults (Harmonic for Acute Cholecystitis Trial, NCT00746850) iscurrently enrolling patients and will clarify these observations. © 2009 by Lippincott Williams & Wilkins
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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