1,720,959 research outputs found
Safety and efficacy of intensive insulin therapy in critical neurosurgical patients.
No full textIntensive insulin therapy to maintain blood
glucose at or below 6.11 mM reduces morbidity and mortality
after cardiac surgery and morbidity in medical intensive care
unit (ICU) patients. The authors investigated the clinical safety
and outcome effects of intensive insulin therapy compared to
conventional insulin therapy in patients receiving postoperative intensive care after neurosurgical procedures
Risk index for perioperative atrial fibrillation in patients undergoing open intracranial neurosurgical procedures.
No full textThe aim of this prospective study was to determine the prevalence of pre-operative atrial fibrillation and the incidence of postoperative atrial fibrillation in patients undergoing elective or
emergency intracranial neurosurgical procedures and the relation to survival and neurological
outcome at 6-months follow-up compared to patients with sinus rhythm. A total of 2020 patients
were enrolled; 1540 patients underwent elective procedures and 480 underwent emergency
procedures. Prevalence of pre-operative atrial fibrillation was 3.7% in elective and 7.2% in
emergency procedures (p = 0.0012). In patients undergoing elective cerebral procedures with
pre-operative atrial fibrillation, compared to patients with sinus rhythm, 6-month neurological
outcome and survival rate are similar. In patients undergoing emergency neurosurgical cerebral
procedures, the presence of pre-operative atrial fibrillation is related to an increased risk of poor
neurological outcome but with similar survival rat
Reply from the authors - Pharmacologic neuroprotection
No full textWe are grateful to Dr Scheller for his interest in our review.1
Dr Scheller has interestingly drawn our attention to one of his articles, where the effects of continuous infusion of nimodi- pine (15– 30 mg kg21 h21), and hydroxyethylstarch 10% (aimed to maintain a hematocrit between 30% and 35%) started the day before surgery and continued until the seventh postoperative day, on facial nerve paresis and hearing loss after schwannoma surgery were tested.2 Dr Schel- ler suggests that his study should been included and described in our review. However, it was not for several reasons
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
Early postoperative cognitive recovery after remifentanil–propofol or sufentanil–propofol anaesthesia for supratentorial craniotomy: a randomized trial
No full textThis study was designed to evaluate early postoperative cognitive recovery after total intravenous anaesthesia with remifentanil–propofol or sufentanil–propofol in patients undergoing craniotomy for supratentorial expanding lesions. Methods: Sixty patients were consecutively enrolled, and randomly assigned to one of two study groups: remifentanil–propofol or sufentanil–propofol anaesthesia. To evaluate cog- nitive function the Short Orientation Memory Concentration Test (SOMCT) and Rancho Los Amigos Scale (RLAS) were administered to all patients in a double-blind procedure before surgery at 15, 45 min and 3 h after extubation
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