Analysis of dynamic damage on middle ear under high pressure / 医用生物力学

ABSTRACT

Objective To study the middle ear damage caused by high pressure.Methods The finite element model of human middle ear was established based on CT scanning,and the change of stress,strain and displacement of the tympanic membrane and stapes footplate was analyzed when the model was applied with timevarying pressure.Results The satisfactory agreement between the computational results and the corresponding experimental data in the literature could indicate the validity of the model.High pressure would cause damage to middle ear,and the damage would be aggravated with the pressure increasing.Rapid pressurization could make severely damage to middle ear,but have minor effect on inner ear.Slow pressurization could also lead to middle ear damage,but inner ear might be damaged before the injury to middle ear.Conclusions High pressure can easily lead to the ear damage;therefore,the pressurized rate should be controlled strictly to protect the hearing during pressurization.