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Pronunciation: in'tra-sis-ter'nal

Definition: Within one of the subarachnoid cisternae; usually refers to the introduction of a cannula into the cerebellomedullary cistern for aspiration of cerebrospinal fluid or the injection of air into the ventricles of the brain.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.