ULTRASONOGRAPHIC DIAGNOSIS OF CANINE HYDROCEPHALUS

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<jats:p>The brains of 23 canine patients and six random‐source dogs were examined ultrasonographically through the bregmatic fontanelle or a surgical craniotomy. Fifteen dogs had abnormal neurologic signs; the others were normal on neurologic examination. Untrasound results were compared with signalment, clinical signs, electroencephalography, computed tomography, radiology and histopathology. The purposes of the study were to demonstrate the use of ultrasound for the diagnosis of canine hydrocephalus and to determine whether there is a relationship between ventricular size and clinical signs. Lateral ventricles were considered enlarged if lateral ventricular height, ventricle‐mantle ratio, or ventricle‐hemisphere ratio, at the level of or caudal to the interthalamic adhesion in the transverse plane, exceeded 0.35 cm, 0.25 or 0.19, respectively. Of the 29 dogs examined, 14 had enlarged lateral ventricles and abnormal neurologic signs. Five dogs had enlarged lateral ventricles but appeared neurologically normal (occult hydrocephalus). Correlation was poor between ventricular size and clinical signs.</jats:p>

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