1,721,006 research outputs found
Infected abdominal aortic aneurysms. Case reports
No full textTwo cases of infected aneurysms of the subrenal abdominal aorta observed in the last year are reported. In this study some specific aspects of this unusual patology are analyzed: the high mortality rate, the difficulties involved in the diagnosis and the surgical solutions
Ischemic proctocolitis following resection of abdominal aortic aneurysm (endoscopic study)
No full textAbdominal aortic prosthetic infection
No full textAim. The purpose of this paper was to compare our personal experience in the treatment of abdominal aortic prosthetic infection by conventional surgery, with the latest techniques characterized by in situ peripheral revascularization. Alloplastic vascular infection is the worst complication of aorto-iliac reconstructive surgery. Conventional surgery consists in the excision of infected prosthesis and lower limbs revascularization with axillo-femoral bilateral bypass. Other surgical solutions, characterized by in situ peripheral revascularization, have been proposed: allograft, autogenous superficial vein, rifampicin-bonded grafts. Materials and methods. A total of 15 patients have been treated, with conventional surgical approach between January 1986 and December 2001, at the Operative Unit of Vascular Surgery of the University of Parma; in 6 cases there was also a prosthetic-duodenal fistula. Results. The 4-month operative mortality has been of 40% (6/15): higher in cases of prosthetic-duodenal fistula 66,6% (4/6), than in those without prosthetic-duodenal fistula 22,2% (2/9). Despite 3 prosthesis reinfections and one case of extra-anatomic bypass thrombosis, the 4-month limb-salvage rate has been of 100%. Conclusions. The conventional surgical approach, used by the authors, is probably the best one in more compromised patients (shock, emergency surgery). In the other cases (low-grade infections, stable patients) new in situ approaches are possible, such as autogenous superficial vein
Pseudo-occlusions of the internal carotid artery
No full textThe pseudo-occlusion (P.O.) of the internal carotid artery is defined as an atheromatous lesion causing a high-grade stenosis, which describes a peculiar angiographic finding ("string sing" or "slim sign"). The authors report their experience with 6 P.O. (angiographically diagnosed) that had been found in 16 months. In all these cases, whenever there was a clinical e/or B-scan ultrasound suspect, angiographic recommendations for the detection of that lesion have been applied. One of these 6 patients, clinically asymptomatic, refused surgery, remaining asymptomatic for cerebral ischemia during the successive 16 months; angiographic control evidenced an unmodified P.O. The other 5 patients, clinically symptomatic, underwent surgical correction: in one, intraoperative finding was a total carotid occlusion. In the other 4 patients the P.O. was confirmed and an endoarterectomy has been done. No immediate or later complications have been noted (clinical and ultrasonographic average follow-up time was 12 months). The experience described by the authors leeds to some considerations: a) the carotid P.O. is not so rare; specially if adequate angiographic technique has been employed; b) the non-invasive studies could not reliably distinguish a P.O; c) intraoperative findings do not confirm, always, angiographic ones but a fibrous, chronic and totally occluded internal carotid artery; d) the evolution of P.O. in a complete carotid occlusion is very probable but not obligatory, and if this happens it needs long period of time; consequently the surgical correction of P.O. could be justified but not urgently; e) the surgical correction of the P.O. can be done without particular difficulty and its outcome is so similar to those obtained from the routine carotid surgery
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
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