1,720,955 research outputs found
Late ureteral stenosis after kidney transplantation: a single-center experience.
No full textIn a retrospective study, we analyzed 1419 consecutive kidney transplantation procedures performed at a single center to identify potential predictive factors of ureteral stenosis. Only stenosis observed after the first month posttransplantation was considered. The Cox proportional hazard regression model was used to analyze donor age and serum creatinine concentration before procurement, recipient age, cold ischemia time, delayed graft function, number of renal arteries, and presence of a double-J stent. Follow-up evaluation included number and timing of acute rejection episodes, cytomegalovirus infection, acute pyelonephritis, renal function, and patient death. Ureteral stenosis developed in 45 patients (3.17%), and was correlated with donor age older than 65 years (P = .001), kidneys with more than 2 arteries (P = .009), and delayed graft function (P = .02). The data suggest a potential protective role of donor age, number of renal arteries, and delayed graft function in development of ureteral stenosis after kidney transplantation
La peritonite incapsulate nel trapianto di rene: esperienza di un singolo Centro nel periodo 1982-2010.
No full textIntroduzione: La peritonite incapsulante (EPS) rappresenta una complicanza della dialisi peritoneale ed è caratterizzata dalla eccessiva formazione di tessuto fibroso peritoneale con incapsulamento dell'intestino e successiva occlusione/subocclusione, da cui la necessità di interventi chirurgici anche reiterati ed il ricorso alla nutrizione parenterale totale. La fisiopatologia della EPS è influenzata da multipli fattori, quali il danno cronico conseguente all’uso dei liquidi da dialisi peritoneale, la durata della stessa dialisi, nonché l’utilizzo di inibitori della calcineurina ad effetto profibrotico durante il post-trapianto.
Pazienti: Nel periodo 01/01/1982-31/12/2010 presso il nostro Centro sono stati effettuati 1500 trapianti di rene (KT). A partire dal 1985, anno di attivazione del programma di KT pediatrico, sono stati effettuati 1213 KT singolo da donatore cadavere, di cui 863 su riceventi adulti e 350 su riceventi pediatrici. Nel periodo 1987-2010 sono stati effettuati 136 KT da donatore vivente. Nel periodo 1997-2010 sono stati effettuati 77 trapianti di doppio rene.
Risultati: I casi diagnosticati di EPS (n = 16) si sono invariabilmente riscontrati in pazienti sottoposti a dialisi peritoneale. In 14 pazienti con EPS si sono resi necessari interventi chirurgici anche reiterati, registrandosi un decesso a seguito di complicanze settiche. In 2 pazienti con EPS è stato possibile adottare un trattamento conservativo.
Conclusioni: La EPS costituisce una complicanza in grado di influenzare negativamente sia l'outcome del KT, sia la qualità di vita dei riceventi
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
Abdominal Compartment Syndrome: An Underrated Complication in Pediatric Kidney Transplantation.
No full textThe transplantation of a large kidney in small children can lead to many complications, including an underrated complication known as abdominal compartment syndrome (ACS), which is defined as intra-abdominal pressure (IAP) =>20 mm Hg with dysfunction of at least one thoracoabdominal organ. Presenting signs of ACS include firm tense abdomen, increased peak inspiratory pressures, oliguria, and hypotension. Between June 1, 1985, and September 30, 2013, our center performed 420 kidney transplants (deceased/living related donors: 381/39) in 314 pediatric recipients (female/male: 147/167). ACS occurred in 9 pediatric patients (weight <15 kg) who received a large kidney from adult donors. In 1 case, the patient underwent abdominal decompression with re-exploration and closure with mesh in the immediate postoperative period. In a second case, the patient developed a significant respiratory compromise with hemodynamic instability necessitating catecholamines, sedation, and assisted ventilation. For small children transplanted with a large kidney, an early diagnosis of ACS represents a critical step. From 2005 we have measured IAP during transplantation via urinary bladder pressure, and immediately after wound closure we use intraoperative and postoperative duplex sonography to value flow dynamics changes. We recommend that bladder pressure should be routinely checked in small pediatric kidney recipients who are transplanted with a large graft
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
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