Individually Fitted Hearing Aid Device Manufactured Using Rapid Prototyping Based on Ear CT. A Case Report

Area of Science:

• Biomedical Engineering
• Medical Device Manufacturing
• Additive Manufacturing

Background:

• Hearing impairment can result from chronic otitis media.
• Custom prostheses are often needed for complex medical conditions.
• Traditional methods for creating medical devices can be time-consuming.

Purpose of the Study:

• To describe the application of rapid prototyping in creating a custom hearing aid.
• To evaluate the effectiveness of stereolithography for fabricating patient-specific medical devices.
• To highlight the benefits of rapid prototyping in reducing production time and improving device fit.

Main Methods:

• Utilized computer-aided design (CAD) models derived from ear CT scans.
• Employed stereolithography technology for fabricating the hearing aid.
• Used vacuum casting for the final production of the custom device.

Main Results:

• An individually fitted hearing aid was successfully produced for a patient with bilateral hearing impairment.
• The rapid prototyping process allowed for precise customization based on patient anatomy.
• The produced hearing aid demonstrated improved fitting compared to standard devices.

Conclusions:

• Rapid prototyping is a viable technology for manufacturing patient-specific biomedical prostheses.
• This approach significantly reduces the time required for device production.
• The technology enhances the fitting and efficacy of custom medical devices, such as hearing aids.