A Contactless Electromagnetic Implantable Middle Ear Device for Sensorineural Hearing Loss

Following basic science experiments, improvement of precision micromechanics and electronics design, and development of different prototypes, a contactless electromagnetic hearing device has been successfully implanted in cats (acute experiments). Chronic animal experiments using the cat as well as the rabbit are ongoing to test the components of the device. A highly efficient air core coil is used to vibrate a neodymium-iron-boron magnet cemented to the body of the incus. The parts of the system, including implanted electronics (hybrid circuit, solid state), are laser welded and hermetically sealed. The system allows for the generation of enough force which vibrates the magnet implanted on the incus. It would be suitable for the treatment of moderate to severe sensorineural hearing loss.

[1]  Niehaus Hh.  The implantable middle ear hearing aid , 1995 .

[2]  A. J. Maniglia.  Implantable hearing devices. State of the art. , 1989, Otolaryngologic clinics of North America.

[3]  K. Gyo,et al.  Development of an Implantable Hearing aid Using a Piezoelectric Vibrator of Bimorph Design: State of the Art , 1984, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[4]  J. Suzuki,et al.  Sound Evaluation of Partially Implantable Piezoelectric Middle Ear Implant: Comparative Study of Frequency Responses , 1994, Ear, nose, & throat journal.

[5]  W. Ko,et al.  Electromagnetic Implantable Middle Ear Hearing Device of the Ossicular-Stimulating Type: Principles, Designs, and Experiments , 1988, The Annals of otology, rhinology & laryngology. Supplement.

[6]  J. Weiler,et al.  Randomized, double-blind, parallel groups, placebo-controlled study of efficacy and safety of Rynatan in the treatment of allergic rhinitis using an acute model. , 1990, Annals of allergy.

[7]  J. Suzuki,et al.  Further clinical experiences with middle-ear implantable hearing aids: indications and sound quality evaluation. , 1989, ORL; journal for oto-rhino-laryngology and its related specialties.

[8]  M. Vlaming,et al.  Studies on the mechanics of the normal human middle ear. , 1986, Clinical otolaryngology and allied sciences.

[9]  A. Nuttall,et al.  Recent Advances in Cochlear Blood Flow Measurements , 1988, The Annals of otology, rhinology, and laryngology.

[10]  M Tos,et al.  Implantation of Electromagnetic Ossicular Replacement Device , 1994, Ear, nose, & throat journal.