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  • Title: Evaluation of brainstem auditory evoked responses in congenital hydrocephalus.
    Author: Venkataramana NK, Satishchandra P, Hegde AS, Reddy GN, Das BS.
    Journal: Childs Nerv Syst; 1988 Dec; 4(6):334-8. PubMed ID: 3245942.
    Abstract:
    Brainstem auditory evoked responses (BAER) were studied in 20 children with clinically diagnosed and CT-confirmed congenital hydrocephalus before and after shunt surgery. Ninety-five percent of the children showed abnormal responses preoperatively. Prolonged wave V latency was the most common abnormality, followed by increased interwave latencies. Total absence of evoked responses was more common in children with communicating hydrocephalus. Following shunt surgery 50% of cases returned to normal and 20% showed a significant improvement. Abnormalities persisted in 10% of cases. BAER abnormalities referrable to caudal brainstem dysfunction recovered first, following CSF diversion. Study of BAER is useful for identifying physiological brainstem abnormalities in hydrocephalic children and promises to be a sensitive non-invasive diagnostic tool for the detection of "non-infective complications" of shunt surgery, if performed serially during follow up.
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