Development and validation of a 3D finite element model of a semicircular canal of the human inner ear
Language French
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Author : Charpiot, Anne
Date : 08-10-2010

Research director(s) : Gentine, André


Institution : Université de Strasbourg
Doctoral school : École doctorale Mathématiques, sciences de l'information et de l'ingénieur (Strasbourg ; 1997-....)
 
Discipline : Biomécanique
Classification : Life sciences, biology, biochemistry, Medicine and health

Keyword(s) : Pas de mots clés en anglais
Keyword(s) :
  • Oreille interne - Thèses et écrits académiques
  • Vertige - Thèses et écrits académiques
  • Modélisation tridimensionnelle - Thèses et écrits académiques
Abstract : This thesis exposes the development of a finite element model of one of the accelerometers of the human inner ear (a semicircular canal). The simulations of normal and pathological conditions will find clinical applications to the study and treatment of vertigo. The first step of this research is the development and validation of a 3D finite element model of one semicircular canal: -The mesh totalises 18882 elements, with linear elastic solids and viscous fluid, using ALE fluid/structure coupling. -The validation test is a physiological rotation with short stop, acceleration of 1800°.s-2 during 0.1 second. The maximal calculated displacement of the cupula is of 17 m (expected value : 21 m), the relaxation of the cupula needs 5.2 seconds (expected: 15 seconds). -A parametric study has concerned the membranes and cupula parameters. The first results show that the elasticity of the membranous canal has to be taken in count. The cupula presents a transversal and a longitudinal displacement. This longitudinal displacement had previously been described in static conditions (during hydrops: inflation of the endolymphatic pressure), but had never been considered before in dynamic conditions. The normal model that has been developed will further be used to simulate different pathological situations of vertigo (otoconia blocked in the canal, plugged canal in Menière disease, etc.).
 
Content type : Text
 
Repository : Local resource
Identifier : ecrin-ori-304901
Document type : TEF