1,720,965 research outputs found
AAA 23. Different Techniques in Endovascular Treatment of Obstructive Aortoiliac Disease
No full textObjective: Obstructive aortoiliac disease must be considered chal-
lenging treatment lesions for vascular surgeons. The aim of our study
was to evaluate the outcomes of endovascular treatment of these lesions
in terms of early and midterm results, comparing standard iliac stenting
with more complex techniques, including kissing stent, covered recon-
struction of aortic bifurcation, and bifurcated endograft deployment.
Methods: A retrospective review was conducted of 142 patients treated
for aortoiliac disease with endovascular technique from March 2015 to
June 2019 at our institution. We considered in our study 80 patients
with obstructive disease and divided our series into a standard stenting
group (35 patients) and complex technique group (45 patients). In the
complex technique group, 23 kissing stents, 12 bifurcated endografts,
and 10 covered reconstructions of aortic bifurcation were included. For
each group, we analyzed comorbidities and morphologic preoperative
and intraoperative details. Early results were analyzed in terms of 30-
day thrombosis, amputation, and death. Follow-up results were analyzed
by life-table analyses (Kaplan-Meier curves) in terms of primary and sec-
ondary graft patency, assisted primary patency, freedom from reinterven-
tion, amputation-free survival, and overall survival. Univariate Cox
regression analysis was performed to identify risk factors and intraopera-
tive details associated with primary stent graft patency. Median follow-up
was 12 months.
Results: The mean age of patients was 65 6 11 years. At 30 days, we did
not record any cases of amputation and death. The rate of thrombosis
was of 8.9 and 5.0 (
c2 , 1.353;
P 1⁄4 .2) in the standard stenting and complex
technique groups, respectively. In the follow-up, primary patency in both
groups was similar (85.5% vs 95%; log rank, 1.530;
P 1⁄4 .2); secondary
patency and limb salvage for patients with critical limb ischemia,
freedom from reintervention, and overall survival did not differ in the
two groups. Univariate analysis did not find any factors affecting primary
patency.
Conclusions: In our experience, endovascular treatment of obstructive
aortoiliac disease offered satisfactory early and midterm results. Complex
techniques, although they are more technically demanding and time-
consuming strategies, may be performed with results similar to those ob-
tained in standard stenting procedures
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
IYSC02. The Role of Gender in Carotid Artery Stenting: A Single-Center Experience
No full textObjectives: Carotid artery stenting (CAS) is a well-documented alterna-
tive technique for the treatment of carotid stenosis. Large randomized
clinical trials showed carotid endoarterectomy is less favorable for symp-
tomatic women than men and less or not beneficial for asymptomatic
women because of a higher periprocedural risk of stroke and death.
CREST did not show any differences between genders in CAS. The aim
of our study was to evaluate the early and long-term Results of CAS at
our institution, focusing our attention on gender results
Methods: A total of 487 consecutive CAS procedures were performed
from January 2006 to September 2018 in our center. We treated 345
men (71%) and 142 women (29%) with both symptomatic and asymp-
tomatic carotid stenosis. Our median length of follow-up is 46 months.
Our postoperative surveillance was performed with clinical and Duplex
ultrasound examination at 1, 6, and 12 months after the procedure and
then yearly. Statistical analysis was performed by SPSS software (SPSS
Inc., Chicago, Ill).
Results: The 30-day stroke rate was similar in both group (1/345 in male
patients versus 0/142 in women;
P 1⁄4 NS; Fig). Our median follow-up was
46 months. During this period, we recorded three other strokes in men
and two strokes in women, not related to CAS (three were hemorrhagic
strokes). In addition, 17 deaths occurred: 1 male patient at the 30-day
follow-up died (stroke-related death) and no women died; thereafter, 11
men died and 5 women died (mortality for all causes). Kaplan-Meier
curves showed similar survival and stroke-free survival rates in both
groups (log-rank test, 0.7;
P 1⁄4 NS).
Conclusions: Our data show CAS is safe and effective also in women,
with a low incidence of intraoperative and postoperative strokes and
with a good overall survival in long-term follow-up
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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