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• W2007279599 abstract "Nos doentes com insuficiência renal crónica terminal o aneurisma da artéria umeral proximal a uma fístula arterio-venosa (FAV) é uma complicação rara e tardia. Os objectivos do estudo foram a caracterização clínica e demográfica destes doentes, a análise da terapêutica cirúrgica adoptada e seus resultados. A análise foi observacional e retrospectiva, durante um período de 10 anos (2002-12) relativa aos doentes insuficientes renais crónicos com transplante renal e aneurisma umeral em membros com FAV rádio-cefálica prévia. Foram excluídos doentes com pseudo-aneurismas relacionados com acessos vasculares. Seis doentes, 5 homens (83%) e 1 mulher (17%) com a idade média de 54 anos, transplante renal e FAV rádio-cefálica laqueada/ocluída foram avaliados. A apresentação clínica mais comum foi a de massa umeral pulsátil indolor. O diâmetro médio dos aneurismas foi de 32,5 mm. Todos os doentes foram submetidos a ressecção do aneurisma e interposição umero-umeral de conduto venoso em 4 doentes, protésico em 1 doente e a anastomose topo-a-topo em 1 doente. No follow-up médio de 35 meses verificou-se num doente trombose de enxerto protésico aos 2 meses e em 2 doentes degenerescência aneurismática (33%) do enxerto venoso e/ou artéria umeral proximal à reconstrução vascular aos 53 e 60 meses, o que motivou nos três doentes segunda intervenção cirúrgica. Não se registaram casos de perda de membro ou de mortalidade. Remodeling expansivo provocado pelo alto débito e shear stress proximal à FAV no contexto de maior sobrevida dos doentes com transplante renal em relação aos doentes em hemodiálise e o eventual efeito da terapêutica imunossupressora, poderão explicar a ocorrência deste efeito degenerativo. O conduto de eleição deve ser o enxerto venoso pela sua maior permeabilidade, não obstante o seu potencial de dilatação subsequente, pelo que é indispensável um programa de vigilância rigoroso. In patients with end-stage chronic kidney disease, brachial artery aneurysms proximal to an arteriovenous fistula are a rare and late complication. The aim of this study was clinical and demographic characterization of these patients and analysis of the outcomes of surgical treatment. An observational retrospective study was conducted comprising a period of 10 years (2002-2012) on receivers of kidney transplant with brachial artery aneurysms in limbs with a previously constructed radiocephalic fistula. Patients with access-related pseudo-aneurysms were excluded. Six patients – 5 male (83%) and 1 female (17%) – with an average age of 54 years, all of whom were kidney transplant recipients and had a ligated/occluded radio-cephalic fistula. The most common presentation was a painless pulsatile mass. Average aneurysm diameter was 32.5 mm. All patients had their aneurysm resected. An interposition graft was placed in 5 patients - vein graft in 4 patients, prosthetic graft in 1 patient. End-to-end anastomosis was performed in 1 patient. The average follow-up was 35 months, with thrombosis of 1 prosthetic graft at 2 months, 2 patients suffered aneurysmal degeneration (33%) of the graft and/or brachial artery proximal to the reconstruction at 53 and 60 months, all requiring a second procedure. No fatalities or cases of limb loss were recorded. Expansive remodeling caused by high flow and shear stress proximal to an arteriovenous fistula associated with longer survival of kidney transplant recipients and the effect of immunosuppressive therapy may explain development of these aneurysms. Our results point out that venous conduit should be the preferred choice by its longer patency, although requiring a non-invasive surveillance program by the risk of late aneurysmal degeneration." @default.
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• W2007279599 date "2014-06-01" @default.
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• W2007279599 title "Aneurisma umeral em doentes com transplante renal" @default.
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• W2007279599 doi "https://doi.org/10.1016/s1646-706x(14)70051-5" @default.
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