NUMERICAL ANALYSIS FOR TYMPANOSTOMY TUBE IN HUMAN EAR
人耳鼓膜置管数值分析

Tympanostomy tube is an effective treatment for secretory otitis media. There have been very few analyses of the biomechanical behavior of the ventilation tube. In this paper, a three-dimensional finite element model of the human ear is established, including the external ear canal, tympanic membrane, tympanostomy tube, ossicular bones, middle ear suspensory ligaments/ muscles, and inner ear fluid, which can describe the complicated structures and boundary conditions. The finite element model is used to analyze the displacement change of tympanic membrane and stapes footplate. At the same time, it is found that the presence of tympanostomy tube significantly affects the displacement vibration of the tube. The effect of tympanostomy tube on sound transmission is explained based on numerical method. The results may be useful to the therapy of secretory otitis media and the design of ventilation tube.