What are auditory osseointegrated implants?

An auditory osseointegrated implant (AOI), commonly referred to as a Baha, is a remarkable treatment option for individuals with hearing loss who cannot wear or sufficiently benefit from traditional hearing aids. Unlike conventional hearing aids, which sit in the ear canal, AOIs utilise a different approach. Patients wear a small device (processor) that attaches to the mastoid bone behind the ear with hearing loss.

How do AOIs work?

The processor detects sound, including speech, occurring on the side with hearing loss. It then converts these sounds into gentle vibrations. These vibrations travel through the bone to the inner ear, where they are perceived as sound. Remarkably, the wearer doesn’t feel the vibrations; they simply hear better.

Why are AOIs used?

AOIs are suitable for individuals with deficits in the middle and/or outer ear that cannot be corrected with medical therapy or surgery. They are especially beneficial when conventional hearing aids are not recommended due to chronic ear drainage, a high risk of recurrent ear infections, or other issues. For those with hearing loss in one ear, even when amplified through a hearing aid, understanding speech remains challenging. AOIs can bridge this gap by directly transmitting sound to the inner ear via bone conduction.

What are the associated risks?

There are many potential risks associated with AOIs. They include: 

• infection
• bleeding
• anesthesia-related complications
• skin irritation
• device malfunction

Who are the ideal candidates?

AOIs are suitable for both children and adults. They are also suitable for individuals who have not benefited sufficiently from traditional hearing aids, and for people suffering from chronic ear issues.