1,720,954 research outputs found
CO(2) laser treatment of laryngeal stenoses after reconstructive laryngectomies with cricohyoidopexy, cricohyoidoepiglottopexy or tracheohyoidoepiglottopexy.
No full textSupracricoid laryngectomy with cricohyoidopexy (CHP) or cricohyoidoepiglottopexy (CHEP) is a conservative laryngeal surgery tailored to T1b-T2-T3 glottic-supraglottic carcinomas. Tracheohyoidopexy (THP) and tracheohyoidoepiglottopexy (THEP) allow a chance of conservative surgery also for selected transglottic carcinomas. These techniques are comprehensively named reconstructive laryngectomies (RLs). Post RL laryngeal stenosis not due to carcinoma persistence or recurrence is an unusual occurrence. The aim of the present study has been to analyse retrospectively and describe the treatment of the cases of laryngeal stenosis after RL, which occurred in Vittorio Veneto Otolaryngological Department in a 6 year period. In the period between 1999 and 2004, 225 patients underwent RL in our Department. In 18 of them (8%) a laryngeal stenosis after RL was diagnosed. The same evidence was shown in 2 patients who underwent RL in other Institutions. All patients underwent CO(2) laser surgical treatment of the laryngeal stenosis. The 14 patients who underwent RL-CHEP, the 5 patients who underwent THEP and the patient who underwent CHP were treated on average with CO(2) laser 1.2 (range 1-2), 4.2 (range 2-7), and 2 times, respectively. Decannulation was possible in all patients but one after CO(2) laser treatment of the stenosis in a mean period of 3.4 months. Laryngeal stenoses after RLs can be successfully treated with CO(2) laser excision with a very limited morbility. The only reasonable contra-indication to CO(2) laser excision could be a cranio-caudal length of the laryngeal stenotic tract longer than 1 cm: in this occurrence diagnosed after THP or THEP, an external surgical approach could be preferred
Treatment of unusual or rare laryngeal nonsquamous primary malignancies: radical (total/extended total laryngectomy) or conservative surgery?
No full textPURPOSE:
The most appropriate treatment of laryngeal nonsquamous malignancies is a controversial subject, mainly because of the limited number of cases diagnosed. Surgery, which is an obligatory choice in nearly all cases, is sometimes indiscriminately demolitive despite the relatively low locoregional aggressiveness that characterizes certain histotypes and locations. Even in extremely aggressive tumors, where the prognosis is almost invariably unfavorable because of distant metastasis, the suitability of radical surgery should be carefully assessed, especially considering the patient's remaining life quality. The aim of the present investigation was to evaluate the postsurgical oncological results in a series of consecutive patients with laryngeal nonsquamous primary malignancy.
METHODS:
We analyzed retrospectively 29 consecutive patients with laryngeal nonsquamous malignancies of whom 10 underwent total laryngectomy and 19 conservative surgery (partial laryngectomies).
RESULTS:
Of the 29 patients with of laryngeal nonsquamous malignancies, 16 were alive and free from disease after treatment, 5 died of other causes, 1 was lost at follow-up, and 7 died of the disease. Statistical analysis failed in disclosing a significantly different local recurrence rate after conservative surgery vs radical surgery after a mean follow-up period of 5.5 years.
CONCLUSIONS:
From the preliminary data emerging from the study, it seems that in nonsquamous malignancies of the larynx, the surgical approach should be the most conservative surgery possible, tailored to neoplasm extent and patient conditions. Although cervical lymph node metastases are unusual, long-term follow-up is mandatory considering the relatively high incidence of distant metastases even after years
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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