The dynamics of endolymphatic hydrops and vestibular disorders.

Endolymphatic hydrops is defined as an accumulation of endolymph in the inner ear leading to a buildup of pressure and distortion of intralabyrinthine structures. The pressure variation is neither obvious nor easy to measure and remains not clearly confirmed. The distortion of endolymphatic structures has been the main described phenomenon since Hallpike, Cairns and Yamakawa in 1938. However, some clinical symptoms associated with endolymphatic hydrops are in addition to the typical triad of symptoms of Meniere's disease. This introduction to the state of the art is an analysis of the relationship between hydrops and clinical vestibular disorders, with a focus on the dynamics of endolymphatic hydrops. The distortion of endolabyrinthine structures can be considered as a dynamic process modeled with mechanical elastic behavior.