Made available in DSpace on 2016-04-28T20:18:33Z (GMT). No. of bitstreams: 1 2009 - Cristiano Chaves Pessoa da Veiga.pdf: 2664372 bytes, checksum: dbcf8de82d489c307ae912d7064a4b85 (MD5) Previous issue date: 2009-07-24 / This work aimed to evaluate changes due to parasitism by Strongylus vulgaris in the aorta, cranial mesenteric and ileocecocolic artery by B-mode ultrasound and blood flow in Doppler mode. In this study it was determined that the incidence is still quite high, and evaluated among the arteries, the artery ileocecocolic presented the major changes ultrasound. Was achieved by brightness mode (B-mode) ultrasonography identify arterial lesions caused by S. vulgaris, however the occurrence of the formation of thrombus was low. The ultrasound showed it is a method much more sensitive than palpation in the diagnosis of arteritis verminotic. The Doppler ultrasound allowed assessment of the hemodynamic flow of blood from the aorta and cranial mesenteric. Doppler in the evaluation of the aorta increased peak systolic velocity (Vmax) of media velocity (Vmedia), the gradient of pressure and relationship between systolic and diastolic velocity (S/D) show increased resistance to blood flow of in the group of animals with any change in ultrasound of the arteries evaluated (C/A). The increase in blood flow volume of the aorta may be related to the increase in pressure gradient. The reduction of resistive index (IR) in the group of animals C/A indicates lesion in the arterial wall due to destruction of elastic fibers that form the arterial wall. Increasing the diameter of the cranial mesenteric artery of the animals in group C/A, accompanied by thickening of the wall, indicates verminotic arteritis. Doppler evaluation in the cranial mesenteric artery was only observed increased in Vmedia indicating increased resistance to blood flow of animals in group C / A. The IR, pulsatilid index (IP) and S/D of the cranial mesenteric artery of the animals in group C / A, was reduced indicating lesion in the arterial wall, which reduces the resistance of the arterial wall, caused by arteritis verminotic. By B-mode ultrasound was possible to identify the dilation of the artery ileocecocolic (small aneurysms), thickening and mineralization observed in the arterial wall. The color Doppler ultrasound allowed the identification of alteration of blood flow in the artery aneurysms ileocecocolic. ? / No presente estudo avaliou-se as altera??es decorrentes do parasitismo por Strongylus vulgaris, nas art?rias aorta, mesent?rica cranial e ileocecoc?lica atrav?s da ultrassonografia em modo B e do fluxo sangu?neo em modo Doppler. No presente estudo determinou-se que a incid?ncia ainda ? bastante elevada e, dentre as art?rias avaliadas, a art?ria ileocecoc?lica foi a que apresentou maiores altera??es ultrassonogr?ficas. Foi poss?vel atrav?s da ultrassonografia em modo brilho (modo B) identificar les?es arteriais causadas por S. vulgaris, entretanto a ocorr?ncia da forma??o de trombos foi baixa. A ultrassonografia demonstrou-se um m?todo muito mais sens?vel do que ? palpa??o no diagn?stico da arterite vermin?tica. A ultrassonografia Doppler permitiu a avalia??o da hemodin?mica do fluxo arterial da aorta e da mesent?rica cranial. Na avalia??o dopplervelocim?trica da art?ria aorta o aumento da velocidade do pico sist?lico (Vm?x), da velocidade m?dia (Vm?dia), do gradiente de press?o e da rela??o entre a velocidade sist?lica e a diast?lica (S/D) indicam aumento da resist?ncia do fluxo sangu?neo no grupo dos animais com altera??o ultrassonogr?fica em alguma das art?rias avaliadas (C/A). O aumento do volume do fluxo sangu?neo da art?ria aorta pode estar relacionado ao aumento do gradiente de press?o. A redu??o do ?ndice de rsistividade (IR), no grupo dos animais C/A indica les?o na parede arterial, devido ? destrui??o das fibras el?sticas que constituem a parede arterial. O aumento do di?metro da art?ria mesent?rica cranial no grupo dos animais C/A, acompanhado do espessamento da parede, indica arterite vermin?tica. Na avalia??o dopplervelocim?trica da art?ria mesent?rica cranial somente foi observado aumento da Vm?dia indicando aumento da resist?ncia ao fluxo sangu?neo no grupo dos animais C/A. O IR, o ?ndice de pulsatilidade (IP) e a S/D da art?ria mesent?rica cranial no grupo dos animais C/A, apresentaram-se reduzidos indicando les?o na parede arterial, que reduz a resist?ncia da parede arterial, causada por arterite vermin?tica. Foi poss?vel atrav?s da ultrassonografia em modo B identificar a dilata??o da art?ria ileocecoc?lica (pequenos aneurismas), observar espessamento e mineraliza??o na parede arterial. A ultrassonografia em modo Doppler colorido permitiu a identifica??o de altera??o do fluxo sangu?neo nos aneurismas da art?ria ileocecoc?lica.