1,720,989 research outputs found
Introductory Chapter. Spinal Cord Injury
Full text linkThe annual global incidence of traumatic spinal cord injury (SCI) was estimated by the Global Burden of Disease Study in 2016, and it resulted in as high as 0.93 million (0.78–1.16 million) per year, with an age-standardized incidence rate of 13 (11–16) per 100,000 population [1]. In the USA, the principal causes of SCI are represented by motor vehicle accidents (36–48%), violence (5–29%), falls (17–21%), and recreational activities (7–16%) [2]. The socioeconomic burden is extremely high due to the young age, the severity of acquired disabilities, and both direct and indirect health-related costs. In fact, the annual national cost in 2009 was as high as 30,770 to $62,563 in 2016 [4]. The most significant cost derived from the severity of disability and complications developed during the hospitalization such as pressure ulcers and infections [5]. The SCI burden is extended also to the psychology of the younger patients, suddenly experiencing paraplegia or quadriplegia [6, 7]. It has been reported that people suffering from SCI are 2–5 times more likely to die prematurely compared to the healthy population [8, 9]. In SCI, the timing for intervention is crucial. Several studies have shown that early medical-surgical intervention could effectively improve functional outcomes. According to the Advanced Traumatic Life Support (ATLS) guidelines, any obstruction of upper airways should be restored while paying attention to neck and spine mobilization. The immobilization procedures should be fastidiously observed even in penetrating trauma without interfering with resuscitation efforts [10]. After immobilization, the patient should be quickly transferred to the closest trauma center hospital
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
The lone star retractor system in neurosurgery
No full textBackground
We investigated the role of a self-retaining retractor system, commonly used in ear, abdominal, vascular, urologic and gynecologic surgeries: the Lone Star retractor system. We report our experience in using the Lone Star retractor in different brain surgeries, at a single neurosurgical department.
Methods
In 2019, patients who underwent brain surgery and in which the Lone Star Retractor System was used were considered for inclusion. Clinical and surgical data of included patients were prospectively collected. Postoperative VAS for local pain, and a properly designed intraoperative retractor stability score, were collected.
Results
Over 2019, the Lone Stare Retractor was used in 20 neurosurgical procedures: 9 high-grade glioma, 2 low-grade glioma, 4 cerebral metastases, and 5 meningiomas. Postoperative mean VAS score was 3.5 (range: 2–4). Intraoperative retractor stability score mean was 2 in frontal, 2 in pterional, 1.75 in subtemporal, 2 in interhemispheric, and 0.5 in suboccipital approaches. The Stony Brook Scar Evaluation Scale mean value was 4.4 (range: 3–5).
Conclusions
In our institutional experience, the Lone Star retractor showed many advantages in different brain procedures, when compared with standard fishhooks and other retractors
Carmustine Wafers Implantation in Patients With Newly Diagnosed High Grade Glioma: Is It Still an Option?
No full textBACKGROUND: The implantation protocol for Carmustine Wafers (CWs) in high grade glioma (HGG) was developed to offer a bridge between surgical resection and adjuvant treatments, such as radio- and chemotherapy. In the last years, however, a widespread use of CWs has been limited due to uncertainties regarding efficacy, in addition to increased risk of infection and elevated costs of treatment. OBJECTIVE: The aims of our study were to investigate the epidemiology of patients that underwent surgery for HGG with CW implantation, in addition to the assessment of related complications, long-term overall survival (OS), and associated prognostic factors. METHODS: Three different medical databases were screened for conducting a systematic review of the literature, according to the PRISMA statement guidelines, evaluating the role of BCNU wafer implantation in patients with newly diagnosed HGG. The search query was based on a combination of medical subject headings (MeSH): “high grade glioma” [MeSH] AND “Carmustine” [MeSH] and free text terms: “surgery” OR “BCNU wafer” OR “Gliadel” OR “systemic treatment options” OR “overall survival.” RESULTS: The analysis of the meta-data demonstrated that there was a significant advantage in using CWs in newly diagnosed GBM in terms of OS, and a very low heterogeneity among the included studies [mean difference 2.64 (95% CI 0.85, 4.44); p = 0.004; I2149 = 0%]. Conversely, no significant difference between the two treatment groups in terms of PFS wad detected (p = 0.55). The analysis of complications showed a relatively higher rate in Carmustine implanted patients, although this difference was not significant (p = 0.53). CONCLUSIONS: This meta-analysis seems to suggest that CWs implantation plays a significant role in improving the OS, when used in patients with newly diagnosed HGG. To minimize the risk of side effects, however, a carful patient selection based mainly on patient age and tumor volume should be desirable
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