1,721,018 research outputs found
Spectrum of Ectopic Pelvic Kidney in Children: A Ten-year Experience.
No full textIntroduction: Many patients with ectopic kidneys remain often undiagnosed
or asymptomatic throughout life. Ectopic pelvic kidneys present a large spectrum
of presentation and symptoms from renal dysplasia to a severe obstruction. One
of the most common problem is the UPJ obstruction with stones formation. We
present here our experience of pelvic kidney in children, the clinical presentation
and the surgical procedures performed
Material and Methods: A total of 17 children, aged from 6 months to 17
years, (14m;3f) were referred to our Institution between January 2004 to June
2014 for pelvic kidney. There were 5 (29.41%) left and 12 (70.5%) right Kidneys.
1. 9 patients presented with moderate to severe UPJ obstruction (three
cases with 10 to 20mm pelvic stones) with normal/moderately-reduced
≥25% relative function at MAG3 radionuclide scan of these patients,
5 with clear symptoms of UPJ obstruction underwent a laparoscopic
dismembered Anderson –Hynes pyeloplasty. The remaining 4,
presented symptomatic intermittent hydronephrosis with colic abdominal
pain. These patients underwent pelvis derotation through a minimally
invasive transposition of the UPJ.
2. 5 patients presented non-functioning kidneys, in 2 cases associated to
hypertension, and underwent laparoscopic nephrectomy.
3. 2 patients presented asymptomatic pelvic kidney.
4. 1 patient presented 3rd G. VUR on the ipsilateral pelvic kidney.
The associate pathology was 1 midshaft hypospadias, 2 criptorchidism , 1
mild mitral insufficiency.
The evaluation of each patient involved their personal and family medical
history, ultrasound examination, VCUG, MAG3 renal scan and MRI in selected
cases.
Results: After a mean follow-up of 6.9 yrs the majority of the patients are
well and none present hypertension. Symptoms resolved in 13 out of 15 surgical
patients. 2 patients needed the positioning of a double J stent from 3 to 8 months
after pyeloplasty that was removed from 6 to 12 weeks after the procedure
Conclusion: Pelvic kidneys present a large spectrum of symptoms.
UPJ obstruction with/without stones, intermittent hydronephrosis, recurrent
abdominal pain, UTI is the most frequent symptoms. The majority of our patients
needed surgical procedures. In four cases there were associated pathologies
as hypospadias, cryptorchidism, and mild mitral insufficiency. Laparoscopic
approach seems a useful tool for the treatment of these kidneys. Pelvis
derotation can be an easy and effective procedure in moderate, intermittent
obstruction
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Ergonomia in laparoscopia pediatrica
No full textLa mancata conoscenza ed applicazione della ergonomia in laparoscopia e segnatamente in laparoscopia pediatrica , dove il campo operatorio e lo spazio di lavoro sono più ridotti che nell’adulto, può porre seri problemi di salute per il chirurgo e può condizionare l’ esecuzione ed i tempi dell’intervento.Nella chirurgia laparoscopica la situazione è molto diversa. L'occhio e l' azione si trasferiscono all' interno dell' addome (Endoblocco operatorio) ed il chirurgo deve rinunciare a parte della sua potenzialità tattile e palpatoria che sarà mediata dagli strumenti operativi.
In questa condizione il chirurgo vede indirettamente il campo operatorio e può accedere alle strutture da manipolare in cavità (toracica, addominale , retroperitoneale etc.) attraverso lunghi strumenti che passano attraverso trocar che sono in posizione fissa. I nostri sensi, in questo caso, lavorano molto di più per ottenere lo stesso risultato. Il disegno appropriato degli strumenti e la disposizione della sala operatoria divengono allora critici per evitare stress ed errori. Possiamo esaminare l’ ergonomia in laparoscopia come l’insieme di problematiche che sono connesse
• all’operatore
• alla strumentazione (progettazione e modalità di utilizzazione)
• alla sala operatori
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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