1,721,085 research outputs found
Un sintomo di allarme : l'emottisi
No full textHemoptysis is a term indicating oral emission of blood coming from respiratory sub-glottic airways, independently from its volume. Blood that enters airspaces can derive from every anatomical site of pulmonary or systemic vascular bed located in contact with components of bronchopulmonary apparatus. All diseases directly or indirectly affecting this apparatus, such as thoracic traumatisms, impairments of hemostasis, severe cardiovascular diseases, can determine blood effusions through different mechanisms, giving rise to hemoptysis. Systemic hypervascolarization characterising areas interested by morbid processes and sustained by bronchial systemic or thoracic extrabronchial vascular bed is by far the most common immediate cause generating hemoptysis, followed, in order of importance, by increased lung capillary pressure (frequent in cardiovascular diseases), increased permeability of alveolo-capillary membrane (characteristic of alveolar hemorrhagic syndrome), and alterations of hemostasis. These mechanisms frequently overlap. Tuberculosis (specially reliquates), bronchopulmonary neoplasms, bronchiectasis, are presently the most frequent causes of hemoptysis. The therapy of such no conditions not only needs treatment of the symptom but also of the causal factors, with the aim of reaching full resolution. The medical therapy , specially in massive recurrent clinical forms, must be integrated with selective embolization of the thoracic systemic vascular bed and/or suitable surgery
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
Forced oscillation technique in patients with systemic sclerosis comparison with diffusing capacity
No full textForced oscillation technique in patients with scleroderma, idiopathic pulmonary fibrosis (IPF) and connective diseases
No full textAppropriate 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
Airway resistance and airflow dynamics after fat injection into vocal folds.
No full textObjectives: The aim of this prospective study was to verify whether vocal fold fat augmentation (VFFA) modifies upper airway patency. To the best of our knowledge, this is the first study analyzing the impact of VFFA on laryngeal resistance to airflow. Methods: Twenty-one consecutive patients 16 to 74 years of age underwent 24 VFFA operations because of glottic incompetence due to laryngeal hemiplegia (13 patients) or vocal fold tissue defects (8 patients). Flow-volume loop spirometry and body plethysmography were performed before and I to 6 months after surgery. Results: There were no significant differences between preoperative and postoperative pulmonary volumes (FVC and FEV1), expiratory flows (PEF, FEF50), or inspiratory flows (PIF, FIF50), although a slight increase in inspiratory flows meant that FEF50/FIF50 slightly decreased. Specific airway resistance (sRaw) increased after VFFA, but not in a statistically significant manner (p=.078). None of the patients experienced postoperative stridor. One obese woman with laryngeal hemiplegia had postoperative effort dyspnea; her respiratory studies showed a reduction in inspiratory flows and an increase in sRaw, and demonstrated progressive improvement. Conclusions: Flow-volume loop spirometry showed that VFFA does not significantly modify respiratory airflows, although a slight increase of inspiratory airflows suggested an improvement in variable extrathoracic obstruction. Body plethysmography proved to be a sensitive procedure that highlighted the subtle increase in upper airway resistance. Hence, VFFA can be considered a relatively safe procedure for achieving vocal fold medialization. and spirometry and plethysmography can be useful for preoperative assessment and postoperative follow-up
Bode index : un indice multidimensionale prognostico per la BPCO
No full textA few attempts have been made in the past to propose suitable multidimensional indices intended to the evaluation of COPD severity degree. We have here considered a recent multidimensional proposal that, starting from severity clinical and functional markers, is oriented to evaluate patient's prognosis (correlation to mortality). We then re-propose origin, advantages and clarification of a recently proposed index which has been well accepted worldwide for its easy utilization (BODE index), showing furthermore good correlation with mortality due to COPD. The individual components of such index are then discussed, which explore with good ease (although not in depth nor in detail) functional, respiratory and metabolic patient's characteristics with a prognostic view
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