In a considerable percentage of the hearing-impaired population, the benefits of conventional amplification may be limited by acoustic feedback, occlusion effect, and/or ear discomfort. Implantable and semi-implantable hearing devices (IHDs) have been developed as an option for patients who derive limited benefit from traditional HAs, but who are not yet candidates for cochlear implants. The Ototronix MAXUM System (Ototronix LLC, Houston, TX) is a semi-implantable device that amplifies sounds using electromagnetic energy transferred from an external ear canal mold to an internal surgically implanted magnet (Fig. 6.1).
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