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Parametric Modeling of Cochlear Electrode Arrays Using Design of Experiments and Finite Element Analysis (FEA).

Abdulaziz S Alaboodi¹, Jamal Alsamri²

¹Department of Mechanical Engineering, College of Engineering, Qassim University, Buraidah, 51452, Saudi Arabia, qu.edu.sa.

Applied Bionics and Biomechanics

|June 24, 2026

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This study optimized cochlear implant (CI) electrode array design using finite element analysis (FEA). Array length and basal radius significantly impact deflection and force, enabling predictable, safe surgical insertion.

Area of Science:

Biomedical Engineering
Materials Science
Surgical Device Design

Background:

Cochlear implant (CI) electrode arrays require precise mechanical properties for safe insertion into the cochlea.
Optimizing array design is critical to prevent surgical complications like extracochlear buckling.

Purpose of the Study:

To biomechanically evaluate tapered cochlear electrode arrays using a parametric finite element analysis (FEA) approach.
To quantify the effects of apical radius, basal radius, and array length on electrode array deflection and reaction force.

Main Methods:

Modeled the electrode array as a platinum-iridium (Pt-Ir) and polydimethylsiloxane (PDMS) composite.
Employed a 3D FEA with a design of experiments (DOE) methodology under simulated surgical deflection (up to 30°).

Keywords:

biomechanics cochlear implant design of experiments electrode arrays finite element analysis mechanical characterization parametric benchmarking platinum-iridium

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Last Updated: Jun 25, 2026

Testing a Cochlear Implant Electrode Insertion Training System for Optimal Electrode Array Placement in Different Inner Ear Anatomies

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Published on: February 6, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research

The Miniature Pig: A Large Animal Model for Cochlear Implant Research

Published on: July 28, 2022

Utilized a 15-run factorial design to analyze parametric effects on tip deflection and reaction force.

Main Results:

Tip deflection ranged from 6.16 to 8.27 mm; reaction force varied from 1.096 to 4.66 mN.
Array length was the primary factor influencing tip deflection; basal radius dominated reaction force.
Predictive regression models achieved near-unity R-squared values, validated against experimental data.

Conclusions:

Developed an efficient, predictive parametric design framework for tapered cochlear electrode arrays.
Flexural rigidity and reaction forces serve as key metrics for assessing surgical handling and trackability.
Findings support optimized CI electrode array design for improved surgical outcomes.