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Infezioni protesiche nella chirurgia vascolare ricostruttiva
Full text linkIntroduzione: presentiamo un’analisi retrospettiva dei risultati a medio e lungo termine sulla ricostruzione in situ con homograft arterioso criopreservato utilizzato nel trattamento delle infezioni protesiche aorto-iliache.
Materiali e metodi: da Gennaio 2002 a Dicembre 2012, 25 pazienti con diagnosi di infezione protesica aorto-iliaca sono stati sottoposti ad intervento di asportazione protesica e ricostruzione in situ con allograft arterioso criopreservato presso l’Unità Operativa Complessa di Chirurgia Vascolare dell’Ospedale Santa Chiara di Trento. Tutti i pazienti furono seguiti al follow-up mediante visita clinica e angio-TC addome ad uno e sei mesi durante il primo anno, successivamente mediante ecocolor doppler aorto-iliaco annualmente, riservando l’angio-TC solo in casi selezionati. Il follow-up medio fu di 46 mesi (range 2-112), 3 pazienti furono persi al follow-up.
Risultati: alla laparotomia esplorativa 9 pazienti (36%) presentavano una fistula aorto-enterica. La ricostruzione chirurgica in situ consistette in 5 by pass aorto-aortici, 4 aorto-bisiliaci, 11 aorto-bifemorali, 3 aorto-iliaci con anastomosi femorale controlaterale e 2 by pass iliaco-femorali. Un paziente (4%) necessitò della precoce rimozione dell’homograft e confezionamento di by-pass axillo-femorale a causa di una deiscenza intestinale recidiva. La mortalità post-operatoria fu del 24%, un paziente (4%) morì per shock emorragico provocato dalla rottura precoce dell’homograft, altri 5 pazienti (20%) morirono per complicanze settiche dovute a deiscenza intestinale recidiva. Tra i 18 pazienti seguiti al follow-up, vennero eseguiti 2 re-interventi (11%): uno dovuto a trombosi ed re-infezione protesica, l’altro, invece, a fistola aorto-enterica con deiscenza dell’anastomosi aortica prossimale. Non ci furono amputazioni maggiori.
Conclusioni: nella nostra esperienza la ricostruzione in situ con homograft arterioso criopreservato mostra ridotti tassi di mortalità e morbilità e può essere considerata una valida alternativa nel trattamento delle infezioni protesiche aortiche addominali.Introduction: We report a retrospective analysis of medium and long-term results about in situ reconstruction with cryopreserved arterial allograft (CAA) for aorto-iliac prosthetic infections.
Material and methods: From January 2002 to December 2012, 25 patients with diagnoses of aorto-iliac prosthetic infection, underwent in situ arterial allograft replacement at the Department of Vascular Surgery, Santa Chiara Hospital, Trento. All patients were followed by clinical examination and CT at 1 and 6 months during the first year, thereafter by yearly duplex scanner and CT-scan in selected cases. Mean follow-up was 46 months (range 2-112); 3 patients were lost at follow-up.
Results: At the explorative laparotomy 9 patients (36%) showed an aorto-enteric fistula (AEF). Surgical in situ reconstruction consisted of 5 aorto-aortic, 4 aorto-bisiliac, 11 aorto-bifemoral, 3 aorto-iliac with controlateral femoral anastomoses and 2 iliac-femoral by-passes. One patient (4%) needed early allograft removal and axillobifemoral reconstruction due to recurrent AEF. Overall post-operative mortality rate was 24%; one patient (4%) died for haemorrhagic shock due to homograft rupture, other five patients (20%) died for septic shock caused by persistent enteric fistula. Among the 18 patients at follow-up, two reinterventions (11%) were required: one due to graft thrombosis and recurrent, the other one due to proximal anastomoses. No major limb amputations were recorded.
Conclusions: In our experience in situ reconstruction with cryopreserved arterial homograft showed low morbidity and mortality rates and should be considered a valid option for the treatment of abdominal aortic prosthetic infections
DILATAZIONE DEL COLLETTO PROSSIMALE E MIGRAZIONI CORRELATE ALLA FORZA RADIALE DELLE ENDOPROTESI: nostra esperienza nel follow up dell' AEG
No full textValutazione della dilatazione del colletto prossimale e migrazioni correlate alla forza radiale delle endoprotesi nella nostra esperienza del follow-up dell’AEG
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
Il trattamento endovascolare laser della vena piccola safena: esperienza personale e confronto dei risultati con altre tecniche ablative endovascolari e chirurgiche tradizionali
No full textDispelling 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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