1,723,132 research outputs found
Carotid Endarterectomy: experience in 8743 cases
No full textintroduction: Recently published case series of patients undergoing carotid endarterectomy suggested a reduction
in the rate of perioperative neurologic events when compared to those reported in the large randomized
trials performed in the 1990s, without great differences between high and low risk patients.
methods: As a major center of Vascular Surgery we prospectively collected data on 8743 carotid endarterectomy
procedures (eversion technique 75%, patch closure 17.5%) performed in the period 1992-2009.
results: Perioperative mortality was 0.32% (27/8743) with myocardial infarction being the most frequent
cause (9 patients). Perioperative neurological morbidity was 1.04% (91/8743) with 51 major and 40 minor
strokes. In 201 cases (2.3%) a cervical hematoma (suture-line bleeding in 41 cases and or diffuse oozing in 160
cases) in the early postoperative period necessitated urgent wound revision. In 262 (3.0%) cases we observed
permanent or transient lesions of cranial nerves in the postoperative period. There was no significant difference
in the combined ipsilateral stroke and perioperative death rate in octogenarian patients (2.1% in octogenarians
and 1.2% in younger patients, p>0.05), even though an increasing trend was evident.
conclusions: Carotid endarterectomy has a reduced rate of perioperative complications when compared to
those previously reported in literature. The low complication rate is related to improved preoperative patients
evaluation, surgeons’ increasing experience and to surgical and anesthesiological techniques. Carotid angioplasty
and stenting should have their results compared to these real world results of carotid endarterectomy in
order to asses their reliability when treating extracranial cerebrovascular disease.Introduction: Recently published case series of patients undergoing carotid endarterectomy suggested a reduction
In the rate of perioperative neurologic events when compared to those reported in the large randomized
trials performed in the 1990s, without great differences between high and low risk patients.
Methods: As a major center of Vascular Surgery we prospectively collected data on 8743 carotid endarterectomy
procedures (eversion technique 75%, patch closure 17.5%) performed in the period 1992-2009.
Results: Perioperative mortality was 0.32% (27/8743) with myocardial infarction being the most frequent
cause (9 patients). Perioperative neurological morbidity was 1.04% (91/8743) with 51 major and 40 minor
strokes. In 201 cases (2.3%) a cervical hematoma (suture-line bleeding in 41 cases and or diffuse oozing in 160
cases) in the early postoperative period necessitated urgent wound revision. In 262 (3.0%) cases we observed
permanent or transient lesions of cranial nerves in the postoperative period. There was no significant difference
in the combined ipsilateral stroke and perioperative death rate in octogenarian patients (2.1% in octogenarians
and 1.2% in younger patients, p>0.05), even though an increasing trend was evident.
conclusions: Carotid endarterectomy has a reduced rate of perioperative complications when compared to
those previously reported in literature. The low complication rate is related to improved preoperative patients
evaluation, surgeons’ increasing experience and to surgical and anesthesiological techniques. Carotid angioplasty
and stenting should have their results compared to these real world results of carotid endarterectomy in
order to asses their reliability when treating extracranial cerebrovascular disease
Linked collectors and determiners for: Genus Galium L. at the CSBG SB RAS collections (NS, NSK).
No full textNatural history specimen data linked to collectors and determiners held within, "Genus Galium L. at the CSBG SB RAS collections (NS, NSK)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/e17d2584-dbc9-4a47-8743-a4e3a379fb33">https://bionomia.net/dataset/e17d2584-dbc9-4a47-8743-a4e3a379fb33</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e17d2584-dbc9-4a47-8743-a4e3a379fb33">https://gbif.org/dataset/e17d2584-dbc9-4a47-8743-a4e3a379fb33</a>. Formatted as a Frictionless Data package
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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