1,720,973 research outputs found
intraoperative strategy in patients with extended involvement of medaiastinal structures
No full textManaging benign tracheal stenosis during COVID-19 outbreak
Full text linkIf elective surgery has been recommended to be postponed
some diseases could potentially become life-threatening
and cannot be delayed. Among these conditions, tracheal idiopathic stenosis, primary caused by endotracheal intubation
or tracheostomy, usually become symptomatic when reach
50% obstruction.
Endoscopic procedures could be considered as frst
treatment in selected patients after stenosis evaluation, such
as non-complex stenosis with low grade of cartilage involvement or tracheomalaci
Airway management by i-gel for open tracheal resection and reconstruction via combined cervicotomy and sternotomy surgical approach. A case report
No full textSurgical resection and tracheal reconstruction are the most effective treatment options for airway stenosis. Tracheal surgery is challenging and requires a multidisciplinary approach and a highly specialized team of anesthesiologists and thoracic surgeons that are "sharing the airways". Several airway management tools, different devices, and various approaches can be required to ensure ventilation and gas exchange. We describe the case of a patient affected by tight tracheal stenosis, submitted to tracheal resection and reconstruction via combined cervicotomy and sternotomy surgical approach. Airway management was successfully performed by i-gel® (Intersurgical, UK) supraglottic device
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
The influence of propofol, remifentanil and lidocaine on the tone of human bronchial smooth muscle
No full textVariations 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
Dexmedetomidine Sedation After Tracheal Surgery. A Prospective Pilot Study
No full textBackground: Fourteen adults undergoing tracheal resection and reconstruction surgery were enrolled in this prospective observational pilot study to evaluate dexmedetomidine-based sedation after tracheal surgery in an Intensive Care Unit. Patients remain electively intubated with an uncuffed nasal endotracheal tube, awake and exhibit spontaneous breathing. The neck was maintained in flexion through chin- to-chest sutures. Infusion of dexmedetomidine was started from a dosage of 0.7 μg kg- 1 h-1 followed by dose titration to the target level of the sedation Richmond Agitation Sedation Scale, (RASS) score –1/–2 using a dose range of 0.2–1.4 μg kg-1 h-1. Results: The mean sedation levels were within the target ranges during the entire 18- hours observation period with a significant decrease in RASS (baseline RASS 1.43 0.5118h RASS -0.860.95, p<0.005). The mean arterial pressure (MAP) and heart rate (HR) were significantly decreased during dexmedetomidine infusion (baseline MAP 90.2914.33 mmHg vs. 18h MAP 82.50 15.44 mmHg; baseline HR 81.5012.76 bpm vs. 18h HR 69.2910.21 bpm, p<0.005). The visual analog scale (VAS) scores significantly decreased (baseline VAS 4.14 0.86 vs. 18 h VAS 2.790.67, p<0.005). Peripheral oxygen saturation did not exhibit any significant decrease. Bradycardia occurred in one patient who assumed beta-blocker therapy without significant changes in blood pressure and was resolved by titration of the infusion without suspending sedation. No cases of delirium were encountered, and no additional sedative or analgesic was required.
Conclusion: Dexmedetomidine provided safe and effective sedation after tracheal surgery in spontaneous breathing patients without causing respiratory depression
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
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