1,720,994 research outputs found
Neurofibromatosis of the esophagus
No full textThere have been previous reports suggesting an association between von Recklinghausen's neurofibromatosis and esophageal dysmotility. We report the first case of true Recklinghausen's neurofibromatosis of the esophagus leading to end-stage pseudoachalasia. The diagnosis and management of this condition is discussed together with the pathogenesis and pathology of this rare entity
Needle Catheter jejunostomy at esophagectomy for cancer
No full textImportant physiological changes occur after major abdominal surgery. Cellular and morphological changes follow a period of malnutrition. Enteral feeding is an important strategy for maintaining gut integrity and function. Controversies remain on the use of feeding jejunostomy after major abdominal surgery and its use had not gained widespread acceptance. The records of 262 consecutive patients who underwent esophagectomy for cancer were reviewed retrospectively to assess whether the placement of a needle catheter jejunostomy (NCJ) at the time of surgery is a safe and useful procedure. All the patients had a 9 Fr. NCJ place in a standardized fashion at the time of the esophagectomy. The technique of placement, the utilisation, and the complications of the NCJ were examined. The enteral nutrition was started in the first post-operative day. Sixty-three percent of our patients required enteral nutrition for 10 or more days. In 19%, this requirement was prolonged for more then 20 days, upto 68 days. The complications related to NCJ were four (1.5%). The use of the NCJ as described is safe, with an extremely low rate of complications. It may provide adequate nutritional support for a prolonged period of time at low costs. Its routine use in patients undergoing esophagectomy is recommended
Oesophagectomy remains the gold standard for treatment of high-grade dysplasia in Barrett's oesophagus
No full textThe goal of surveillance in Barrett's oesophagus is to detect high-grade dysplasia (HGD). The natural history of HGD is unclear, but because of the reported high risk of coexistent invasive carcinoma, oesophagectomy is currently the gold standard treatment. Recent reports suggest the risk of coexistent tumour may be lower and that the optimum treatment for HGD is continuing surveillance or mucosal ablation treatment, reserving oesophagectomy for those patients with invasive malignancy. To re-examine the role of oesophagectomy we looked at the incidence of invasive cancer in patients undergoing resection for HGD and their subsequent outcome
How I do it - Needle catheter jejunostomy at esophagectomy for cancer
No full textImportant physiological changes occur after major abdominal surgery. Cellular and morphological changes follow a period of malnutrition. Enteral feeding is an important strategy for maintaining gut integrity and function. Controversies remain on the use of feeding jejunostomy after major abdominal surgery and its use had not gained widespread acceptance. The records of 262 consecutive patients who underwent esophagectomy for cancer were reviewed retrospectively to assess whether the placement of a needle catheter jejunostomy (NCJ) at the time of surgery is a safe and useful procedure. All the patients had a 9 Fr. NCJ place in a standardized fashion at the time of the esophagectomy. The technique of placement, the utilisation, and the complications of the NCJ were examined. The enteral nutrition was started in the first post-operative day. Sixty-three percent of our patients required enteral nutrition for 10 or more days. In 19%, this requirement was prolonged for more then 20 days, upto 68 days. The complications related to NCJ were four (1.5%). The use of the NCJ as described is safe, with an extremely low rate of complications. It may provide adequate nutritional support for a prolonged period of time at low costs. Its routine use in patients undergoing esophagectomy is recommended
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
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