This paper deals with analysis of the dynamic behavior of the patulous Eustachian tube. Three-dimensional finite element method is used in this study to model the human Eustachian tube. Dynamic behavior of the patulous Eustachian tube caused by sniff was analyzed. Pressure distribution in the Eustachian tube was first obtained and was found to be roughly uniform all over the Eustachian tube. Then, the deformation of the patulous Eustachian tube was analyzed by applying the uniform pressure to the lumen of the Eustachian tube. As a result, the Eustachian tube started to close at its narrowest portion, and the area of occlusion expanded toward the pharyngeal orifice.
