Aspectos morfológicos da veia efálica na trombose aguda experimental e na aplicação de cateter de Fogarty em equinos

• Ano de defesa: 2015
• Autor(a) principal: Bernardo, Juliana de Oliveira [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Cateteres; Tromboflebite; Equino - Doenças; Trombose; Thrombosis
• Link de acesso: http://hdl.handle.net/11449/131892; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/05-11-2015/000852670.pdf

Thrombosis can occur frequently in horses as a consequence of disseminated intravascular coagulopathy, hypoxia, endotoxemic, colics and laminitis or a iatrogenic process. However, there are few studies regarding vascular surgery and morphology changes of this process in horses. This research aimed to study the morphology and histopathological aspects of the cephalic vein in two experimental models. Ten healthy horses, was divided into two studies: Thrombosis study (ET), were used to evaluate the histopathological aspects of the cephalic vein in induced acute thrombophlebitis. Fogarty study (EF) was evaluated histopathological aspects after the immediate application of the Fogarty catheter. To achieve morphological based measures of the coats, were collected a sample control (AC) from a healthy cephalic vein. The animals of ET, chemical induction of thrombosis was performed in the cephalic vein and 24 hours proceeded the segment collection of the vessel for histological evaluation. The animals of EF, were submitted to the passage of a Fogarty catheter in the patent and healthy cephalic vein, followed by immediate collection of a segment venous. The cephalic vein segments were divided into proximal and distal and analyzed for morphology and histometry. The ET segments showed thickening of the vascular wall, with disorganization of the smooth muscle cells, increased amount of extracellular matrix and morphological alteration of endotelial compared to AC. The segments EF showed morphological changes in endothelial cells and fewer smooth muscle cells in relation to AC. From these results, we can conclude that thrombosis induced inflammatory response in vascular wall thickening and coats related to the presence of thrombus. The EF presented morphological alteration of endothelial cells in immediate response to the passage of the catheter, but so did the segment where there was the passage of the catheter