Electrophysiological monitoring of cochlear function as a non-invasive method to assess intracranial pressure variations

Acta Neurochirurgica. Supplement
Laurent SakkaJ Chazal

Abstract

The "cochlear" aqueduct is a narrow channel connecting the subarachnoid and intralabyrinthine spaces. Through this communication, cerebrospinal fluid (CSF) pressure variations are transmitted to the intralabyrinthine space and modify the impedance of the ear. Distortion-product otoacoustic emissions (DPOAE) are sounds emitted by cochlear sensory cells in response to sonic stimulation. Cochlear microphonic potentials (CMP) express the electrophysiological activity of cochlear sensory cells. At 1 kHz, the phase of DPOAE and CMP varies according to the impedance of the ear and thus to intracranial pressure (ICP) variations. DPOAE and CMP have been shown to strictly follow ICP variations produced during infusion tests performed in the diagnosis of chronic hydrocephalus. DPOAE and CMP recordings appear to be valuable tools for monitoring ICP non-invasively.

Citations

Jun 28, 2014·High Altitude Medicine & Biology·Mark H WilsonChristopher H E Imray
Oct 31, 2015·Acta Neurologica Scandinavica·C RobbaM Czosnyka
Aug 2, 2019·World Journal of Clinical Cases·Deb Sanjay NagShashi Kant

❮ Previous
Next ❯

Related Concepts

Related Feeds

CSF & Lymphatic System

This feed focuses on Cerebral Spinal Fluid (CSF) and the lymphatic system. Discover the latest papers using imaging techniques to track CSF outflow into the lymphatic system in animal models.