1,720,966 research outputs found
Type III B endoleak leading to aortic rupture after endovascular repair: analysis of errors in follow up and treatment
No full textAbstract Background The aim of this paper is to describe the case of a patient with a type III endoleak which was misdiagnosed and treated without success as a type I-II endoleak. An incorrect endoleak diagnosis lead to aortic rupture, which could be avoided with a correct diagnosis. Type III B endoleaks presents some diagnostic difficulties, in the case we describe, they were increased by late presentation and poor follow up. Case presentation We revised this 89 years old patient history, he underwent EVAR 11 years before, a control scan six month after surgery, showed a type I-II endoleak which was still present after first intervention. He was treated with proximal cuff positioning and embolization coils. Eight years after first intervention, a Computed Tomography Angiography (CTA) showed persisting type I-II endoleak so same problem was suspected and patient was treated with another proximal cuff and right iliac extension. A Magnetic Resonance Imaging (MRI) control, six months later, showed an increase of the aneurysm sac size of 12 mm. Two years later patient presented at emergency room at our hospital with malaise, sweating and abdominal pain. Computed Tomography (CT-scan) showed increased abdominal aortic diameter (140 × 130 mm) with rupture and hemoperitoneum. He was treated in urgent fashion with endograft removal and aortic-iliac Dacron graft reconstruction. During surgery three large tears on endograft fabric and a stent suture rupture were observed. After surgery patient was admitted in intensive care unit and died on second postoperative day due to multiorgan failure. Conclusions Type III endoleak is an uncommon complication: a correct and prompt diagnosis is mandatory for appropriate treatment After EVAR, and especially in those cases of known endoleak, a correct follow-up is mandatory and in case of diagnostic doubts correct imaging should be performed. Media contrast allergies should not be neglected and should not represent a CTA limitation
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
Comparison of Open and Endovascular Surgery for the Treatment of the Infections of the Thoracic Aorta
No full textAppropriate 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
Satisfaction and quality of life relative to anesthesiologic and surgical technique in carotid revascularization
No full textEndovenous Laser Ablation with 1,470-nm Diode with Tumescence Anesthesia and Saphenofemoral Ligation: Propensity Score Match Comparison
No full textBackground: The aim of this study is to compare 2 groups of patients treated for great saphenous vein (GSV) reflux with open surgical saphenofemoral ligation (SFL) and endovenous laser ablation (EVLA). Methods: Consecutive patients with primary unilateral GSV reflux undergoing EVLA treatment since 2014 were enrolled, and another series of patients treated with SFL was considered. The patients were stratified according to treatment and the results were compared using the propensity score (1:1). The covariables were age, gender, body mass index, CEAP (Clinical class, Etiology, Anatomy and Pathophysiology) staging, and GSV and saphenofemoral junction diameters. Primary outcomes were GSV occlusion or recurrent groin varicose veins at 1 year after treatment. Secondary outcomes included vein thrombosis, hyperpigmentation, paresthesia, postoperative pain, analgesic requirement, and ecchymosis assessed at discharge and CEAP stage and quality of life (QoL) assessment 1 month after surgery. Results: A total of 123 patients were included in the study: 59 were treated with EVLA and 64 with SFL. At 12 months, we observed 10 recurrent groin varicose veins after SFL (15.6%) and 6 GSV recanalization after EVLA (10.2%, P = 0.369). Extra-saphenous recurrent varicose veins were observed in 36 patients (29.3%): 20 in the open group (31.2%) and 16 in EVLA group (27.1%, P = 0.615). After matching procedure 74 patients were analyzed (37 patients by group), logistic regression model showed that the risk of outcome was not associated with the surgical treatment (odds ratio 1.76, 95% confidence interval 0.52–6.01). Conclusions: Both techniques to treat saphenous impairment have demonstrated to be safe, with good results in terms of efficacy and symptomatic improvement at follow-up. EVLA with 1,470 nm seems to have lower rates of recurrence and good perceived QoL. Tumescent anesthesia is a good option with good results and may be extended to open surgical ligation
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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