1,720,988 research outputs found
Percutaneous controlled thermocoagulation in the treatment of trigeminal neuralgia
No full textThis study reviews the results and complications of 162 percutaneous thermocoagulations of the gasserian ganglion in 124 patients with typical idiopathic trigeminal neuralgia. The mean duration of follow-up observation was 3.7 years (range, 1-6 years). One hundred eighteen of 124 patients continued to show complete pain relief 1 month after the operation, and at the end of follow-up observation, 83 of 124 patients (67%) continued to enjoy complete pain relief (recurrence rate, 28.2%). Anesthesia dolorosa occurred in 3% of cases, dysesthesia in 3%, and paresthesia in 17%; neuroparalytic keratitis with permanent reduction of visual acuity was observed in 2% of cases, permanent diplopia in 1%, permanent hearing deficit in 3%, and permanent impairment of mastication in 3%. We compare thermocoagulation with other surgical procedures (microvascular decompression, glycerol injection, and percutaneous decompression) used in the treatment of trigeminal neuralgi
Three posterior percutaneous celiac plexus block techniques. A prospective, randomized study in 61 patients with pancreatic cancer pain
No full textVariations and refinements of the classic retrocrural technique of neurolytic celiac plexus block (NCPB) for pancreatic cancer pain (PCP) have been proposed over the last 30 yr to improve success rates, avoid complications and enhance diagnostic accuracy. The aim of this prospective, randomized study was to assess the efficacy and morbidity of three posterior percutaneous NCPB techniques in 61 patients with PCP. The 61 patients were randomly allocated to three NCPB treatment groups: group 1 (20 patients, transaortic plexus block); group 2 (20 patients, classic retrocrural block); and group 3 (21 patients, bilateral chemical splanchnicectomy). The quality and quantity of pain were analyzed before and after NCPB. No statistically significant differences (P greater than 0.05) were found among the three techniques in terms of either immediate or up-to-death results. Operative mortality was nil with the three techniques and morbidity negligible. NCPB abolished celiac PCP in 70-80% of patients immediately after the block and in 60-75% until death. Because celiac pain was only a component of PCP in all patients, especially in those with a longer time course until death: 1) abolition of such pain did not ensure high percentages of complete pain relief (immediate pain relief in 40-52%; pain relief until death in 10-24%); 2) NCPB was effective in controlling PCP in a higher percentage of cases if performed early after pain onset, when the pain was still only or mainly of celiac type and responded well to nonsteroidal antiinflammatory drug therapy; and 3) the probability of patients remaining completely pain-free diminished with increased survival tim
3 POSTERIOR PERCUTANEOUS CELIAC PLEXUS BLOCK TECHNIQUES - A PROSPECTIVE, RANDOMIZED STUDY IN 61 PATIENTS WITH PANCREATIC-CANCER PAIN
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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
Recenti acquisizioni in tema di Profilassi e Terapia della Tromboembolia Polmonare.
No full textPulmonary embolism (PE) is a common disease with variable symptoms and high overall mortality. The clinical relevance of the extent of PE is still debatable, and the role of anticoagulation in patients with subsegmental involvement has been conteste
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