Transcranial duplex doppler ultrasonography in dogs with hydrocephalus

Abstract

Transcranial duplex Doppler ultrasound was performed in 32 conscious dogs presenting ventriculomegaly detected in B-mode, obtaining measures of lateral ventricles and resistance parameters of main cerebral arteries before and after 30 days of clinical treatment. The animals were distributed divided in two groups: group 1, dogs that presented remission or decrease of the neurological signs of the disease after clinical therapy; and group 2, dogs that displayed worsening of the neurological signs or clinical stability. The data were all presented in tables and were submitted to paired t test and to logistic regression models to evaluate the influence of the RI reduction on both groups. There was no significant influence of the variables in the B-mode. After the treatment, the mean resistive index (RI) was significantly lower for the group that presented clinical improvement. There was no significant difference of the mean RI reduction for the same artery when the right and left sides were compared. It could be concluded that transcranial duplex Doppler ultrasound is a method of cerebral hemodynamic assessment able to monitor more precisely the treatment of hydrocephalus in dogs and verify the responses.Keywords: dog, Doppler ultrasonography, neurology, hydrocephalus RESUMO Foi realizada a ultrassonografia duplex Doppler transcraniana em 32 cães, conscientes, que apresentavam ventriculomegalia previamente detectada ao exame modo-B, para obter as medidas dos ventrículos laterais e os parâmetros de resistência das artérias cerebrais antes e depois de 30 dias de tratamento clínico. Os animais foram distribuídos em dois grupos: 1 -formado por cães que apresentaram remissão ou diminuição dos sinais clínicos após tratamento; 2 -por cães que apresentaram piora dos sinais neurológicos ou estabilidade do quadro clínico. Todos os dados foram dispostos em tabelas e submetidos ao teste t pareado e a modelos de regressão logística para avaliar a influência da redução do índice de resistividade (IR). Não foi observada influência das variáveis

Foetal echoencephalography and Doppler ultrasonography of the middle cerebral artery in canine foetuses

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Small breed dogs with confirmed stroke: concurrent diseases and sonographic findings

“…Although the deposition of atheromatous plaques does not happen naturally in the aging process of the dog, it is known that animals which have diseases that lead to changes in cholesterol metabolism may have vascular stenosis similar to that which occurs in humans (Pattersen et al, 1985;Joseph et al, 1987;Braund, 1994;Garosi, 2010). These promote vascular stenosis in several degrees (Burgin et al, 2000) and can be detected by Doppler spectral (Nagai et al, 1997;Fukushima et al, 2000;Saito et al, 2003;Carvalho et al, 2007;Carvalho et al, 2010a;Carvalho et al, 2010b). ).…”

Determinación de lesiones encefálicas en canes mediante tomografía computarizada en Lima, Perú

“…La HI constituía una enfermedad de rara identificación certera antes que las técnicas de imagenología no invasiva como la TC aparecieran en la práctica (Przyborowska et al, 2013). Estos avances lograron identificar a la HI como la causa de más de la mitad del total de casos de malformaciones congénitas cerebrales en canes (Carvalho et al, 2010). En pacientes jóvenes o menores de un año se distingue a la hidrocefalia de tipo congénito, donde los animales afectados cursan con diversidad de signos clínicos y variables grados de severidad (Orozco y Aranzazu, 2004).…”