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Coupled Finite Element Model of the Middle and Inner Ear as Virtual Test Environment for Stapes Surgery.
1Reutlingen Research Institute, Reutlingen University, Reutlingen, Germany.
Summary
A new finite element (FE) model of the human ear was developed to assess middle-ear prostheses performance. This validated model simulates various prosthesis designs, aiding in the development of improved hearing devices.
Area of Science:
- Biomechanics
- Medical Engineering
- Otolaryngology
Background:
- Middle-ear prostheses are crucial for hearing restoration.
- Evaluating prosthesis performance requires accurate biomechanical models.
- Existing models may not fully capture complex middle-ear dynamics.
Purpose of the Study:
- To develop and validate a coupled finite element (FE) model of the human middle and inner ear.
- To create a reconstructed ear model for evaluating stapes prostheses.
- To investigate the impact of prosthesis design on auditory function.
Main Methods:
- Developed a finite element (FE) model of the middle ear, treating ossicles as rigid bodies.
- Validated the middle-ear model using literature transfer function measurements, including pathological cases.
- Developed and validated an inner-ear FE model using tonotopy, impedance, and basilar membrane motion data.
- Coupled the middle and inner ear models and replaced the stapes with prosthesis models.
- Investigated prosthesis diameter and footplate gap effects on various auditory parameters.
Main Results:
- The coupled FE model accurately represents human ear biomechanics.
- Simulations revealed the influence of prosthesis diameter and footplate sealing on auditory outcomes.
- Key performance indicators like basilar membrane displacement and intracochlear pressure were analyzed.
Conclusions:
- The validated coupled FE ear model serves as a robust platform for evaluating middle-ear prostheses.
- Findings provide insights for designing novel and improving existing stapes prostheses.
- This research facilitates the optimization of middle-ear implantable devices for better hearing outcomes.
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