Computing simulated endolymphatic flow thermodynamics during the caloric test using normal and hydropic duct models
Rey-Martinez J (1), McGarvie L (2), Pérez-Fernández N (3).
(1a) Otolaryngology Unit Orlgipuzkoa , Clínica Quirón , San Sebastián , Spain.
(2b) Institute of Clinical Neurosciences , Royal Prince Alfred Hospital , Camperdown , NSW , Australia.
(3c) Department of Otolaryngology , Clínica Universidad De Navarra , Pamplona , Spain.
The obtained simulations support the underlying hypothesis that the hydrostatic caloric drive is dissipated by local convective flow in a hydropic duct.
To develop a computerized model to simulate and predict the internal fluid thermodynamic behavior within both normal and hydropic horizontal ducts.
This study used a computational fluid dynamics software to simulate the effects of cooling and warming of two geometrical models representing normal and hydropic ducts of one semicircular horizontal canal during 120 s.
Temperature maps, vorticity, and velocity fields were successfully obtained to characterize the endolymphatic flow during the caloric test in the developed models.
In the normal semicircular canal, a well-defined endolymphatic linear flow was obtained, this flow has an opposite direction depending only on the cooling or warming condition of the simulation.
For the hydropic model a non-effective endolymphatic flow was predicted; in this model the velocity and vorticity fields show a non-linear flow, with some vortices formed inside the hydropic duct.
CITATION Acta Otolaryngol. 2016 Oct 14:1-5