Ultrasonographic Diagnosis of Canine Hydrocephalus

Hudson, Judith A.; Simpson, Stephen T.; Buxton, Donald F.; Cartee, Robert E.; Steiss, Janet E.

doi:10.1111/j.1740-8261.1990.tb00782.x

Cited by 41 publications

(39 citation statements)

References 29 publications

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“…Even when logistic regression models were applied, it could be noticed that there is no significant influence of the variables in the B-mode (measurements of the ventricles before and after medicine administration, presence of open fontanelle, and communication between lateral ventricles) in relation to improvement of the patient. These results confirm those previously described in the literature (Hudson et al, 1990;Spaulding and Sharp, 1990). Researches demonstrated that the acute hydrocephalus produced in cats promotes the reduction of 22% in the blood flow of the brain, cerebellum; and encephalic trunk (Hochwald et al, 1975).…”

Section: Resultssupporting

confidence: 90%

Transcranial duplex doppler ultrasonography in dogs with hydrocephalus

Carvalho¹,

Chammas²,

Neto

et al. 2010

Arq. Bras. Med. Vet. Zootec.

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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

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Section: Resultssupporting

confidence: 90%

Transcranial duplex doppler ultrasonography in dogs with hydrocephalus

Carvalho¹,

Chammas²,

Neto

et al. 2010

Arq. Bras. Med. Vet. Zootec.

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“…1), sendo 16 (55,1%) fêmeas e 13 (44,9%) machos. Este resultado confirma os da literatura, sugerindo predisposição das fêmeas ao aparecimento dessa afecção (Hudson et al, 1990 (Nautrup e Tobias, 2000). As lesões focais hipoecogênicas podem ser decorrentes de hematoma, lesões granulomatosas e neoplasia (Hudson et al, 1998; Nautrup e Tobias, 2000) e as lesões hiperecogênicas, decorrentes de lesões hipóxico-isquêmicas, hemorrágicas ou neoplásicas (Hudson et al, 1998;Andrade Neto, 2004).…”

Section: Resultsunclassified

Ultra-sonografia transcraniana em cães com distúrbios neurológicos de origem central

Carvalho

Neto

Jimenez³

et al. 2007

Arq. Bras. Med. Vet. Zootec.

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RESUMOAvaliaram-se 55 cães com distúrbios neurológicos e verificou-se a ocorrência de afecções neurológicas de origem central, detectadas pela ultra-sonografia transcraniana (USTC). Vinte e nove (52,9%) animais apresentaram diagnóstico compatível com hidrocefalia, e destes, 16 (55,1%) eram fêmeas e 15 (51,7%) tinham menos de dois anos. Quinze (27,3%) cães apresentaram lesões focais, quatro (7,2%), alterações difusas e quatro (7,2%) apresentavam imagens sugestivas de lissencefalia; em três (5,4%) não foram detectadas alterações pela USTC. A hidrocefalia foi o distúrbio neurológico de origem central mais freqüente e a USTC é uma alternativa viável para auxiliar na rotina clínica veterinária como ferramenta diagnóstica na detecção de alterações morfológicas e estruturais do cérebro no cão.Palavras-chave: cão, ultra-sonografia, cérebro ABSTRACT In this work, 55 dogs with neurologycal disorder were examined and central neurological affections were detected by transcranial ultrasonography (TCUS

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“…However, asymmetries between both LVVs were found, with the left lateral ventricle always larger than the right lateral ventricle. The asymmetry of the lateral ventricles is considered normal in healthy dogs up to a certain value [36,37,39,48,49]. In a study using Labrador retrievers, De Haan et al [37] estimated an asymmetry of 31%.…”

Section: Discussionmentioning

confidence: 99%

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

Carreira

Universitário²,

Ajuda³

2015

Glob Anesth Perioper Med

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Objectives: The brain's inner cavities containing cerebrospinal fluid are referred to as ventricles, which are easily identified in an ultrasonographic (US) image as hypoecogenic and in computed tomography (CT) as hypodense. Imaging has become essential to planning and neuronavigation in brain surgeries, serving to guide the surgeon through the organ. The study aimed to 1) compare ultrasonography (US) and computed tomography (CT) measurements of lateral ventricle volumes (LVV) in dogs to determine their level of agreement and 2) understand their influence on surgical planning and neuronavigation. Materials and methods:Measurements were taken from a sample of 24 LVVs from 12 brachycephalic dog cadavers. First, 2 mm slices of the dogs' brains were scanned with the CT machine. The US brain scan technique was performed using a transducer of 7.5 MHz over the brain after craniotomy placement. This procedure was useful in simulating the brain neuronavigation technique in a two-dimensional scenario. A P value less than 0.05 was defined as statistically significant. Results:A comparison of the US and CT images showing measurements of the right and left LVVs showed no statistically significant differences between the LVVs, allowing us to conclude that US is a reliable technique to planning and neuronavigation in brain surgeries. Conclusion:As a result US is of great value in the everyday practice and areas working with limited resources such as in veterinary medicine, or even in a zooubitquity context, since in some human's hospitals of developing countries or in some rural and remote areas, access to CT, magnetic resonance MR techniques, and neuronavigation systems are limited to point high-technology centers, unlike the sonography (US). Therefore, US it is a reliable technique to planning and neuronavigation in brain surgeries, thus promoting patient safety and surgeon success.

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Ultrasonographic Diagnosis of Canine Hydrocephalus

Cited by 41 publications

References 29 publications

Transcranial duplex doppler ultrasonography in dogs with hydrocephalus

Transcranial duplex doppler ultrasonography in dogs with hydrocephalus

Ultra-sonografia transcraniana em cães com distúrbios neurológicos de origem central

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

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