1,720,979 research outputs found
Trattamento del moncone pancreatico dopo DPC con metodi alternativi alle anastomosi pancreaticodigiunali
No full textLa Duodenocefalopancreatectomia è indicata nel trattamento dei tumori ampollari, del terzo inferiore del coledoco, della testa del pancreas e del duodeno. Questa metodica trova altre indicazioni nel trattamento della pancreatite cronica calcificante, allorché le lesioni siano prevalentemente situate nella testa del pancreas.
A questa anastomosi è legata l'importanza dell'intervento giacché nel 20% dei casi, soprattutto se si interviene per neoplasia, si ha la sua deiscenza e la comparsa di una fistola pancreatica mista alla quale si collegano molte delle complicanze del postoperatorio; infatti essa risulta letale in un terzo dei casi e giustifica oltre la metà delle morti dell’intervento2 · 6.
A tal fine abbiamo sviluppato le tecniche di chiusura del moncone. In questo lavoro presentiamo i dati concernenti l’esperienza di due anni con le tecniche di trattamento del moncone pancreatico senza anastomosi pancreaticodigiunale in corso di DPC per cancro (18 pazienti, 13 maschi e 5 femmine, età media 56 anni).
Gli Autori riportano una serie di 18 pazienti, affetti da cancro del pancreas e sottoposti a duodeno-cefalopancreasectomia con metodi alternativi alle anastomosi pancreatico-digiunali (drenaggio esterno del moncone, occlusione del dotto con prolamina alcolica e sutura meccanica del moncone, legatura del dotto e sutura del moncone in vycril, occlusione del dotto con prolamina e sutura in vycril del dotto) nell'intervallo 5/1986- 5/1988. Mortalità operatoria nulla. I dati metabolici a distanza (diabete) risultano correlati all'evento presenza/assenza di fistola pancreatica postoperatoria.
In conclusione la tecnica di chiusura del moncone aumenta l'incidenza di fìstola pancreatica (11:1 8 = 61,1 %) , genera insuffìcienza esocrina nel 100% dei casi e diabete nei pazienti il cui decorso post-operatorio sia stato complicato da fìstola. La chiusura del moncone pancreatico è accettabile dopo DCP laddove un’anastomosi pancreaticodigiunale sarebbe troppo rischiosa in presenza di un pancreas friabile
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
Endoscopic drainage of pancreatic pseudocysts: a long term follow up study of 49 patients
No full textBackground/Aims: Endoscopic drainage is one of the non-surgical treatment modalities for pancreatic pseudocysts. The aim of the current study was to assess the safety and the utility of endoscopic treatment of pancreatic pseudocysts. Prognostic factors for the outcome were evaluated in a prospective analysis. Methodology: Forty-nine consecutive symptomatic patients were included in the study. Transmural drainage was used in 30 patients and transpapillary drainage in 19 patients. Results: Successful drainage was achieved in 27/30 (90%) patients after transmural drainage and in 16/19 (84.2%) patients after transpapillary drainage. Twelve (24.5%) patients had complications: 2 patients had bleeding, 2 patients had mild pancreatitis, 8 patients had cyst infection, in relation to the presence of necrosis (5 patients) or clogging of the stent (3 patients). Nine patients (20.9%) had recurrence of pseudocysts. Endoscopic drainage was a definitive treatment in 37/49 (75.5%) patients (median follow up: 25.9 months) Conclusions: Endoscopic drainage provides a successful and safe minimally invasive approach to pancreatic pseudocyst management
Impact on the quality of remaining life of treatment with self-expandable metal prostheses in patients with inoperable esophago-cardial cancer. Results of a study of 107 consecutive patients treated with Ultraflex-type prostheses.
No full text- …
