PRESSURE RELATION BETWEEN INTRACRANIAL AN D INTRACOCHLEAR FLUIDS IN PATIENTS WITH DISEASES OF THE INNER-EAR

Intracranial pressure is transmitted to the perilymph of the cochlea v ia the cochlear aquaeduct and via Reissner's membrane to the endolymph . The ''Tympanic Membrane Displacement Analyser (TDA)'' is a new devic e that may be a useful non-invasive method to show intracranial and in tracochlear pressure changes indirectly measured by tympanic membrane displacement during stapedial reflex contraction. The TDA was utilised in 20 normal persons and in 29 patients with unilateral diseases of t he inner ear. No significant differences in the tympanic membrane disp lacement were found between patients with sensorineural hearing loss, patients with Meniere's disease, and normal persons.