Abstract
Despite modern development in ear surgery many individuals hard of hearing need a hearing aid. The most common type is one that delivers the amplified sound through the external ear canal. There are however conditions where this is not possible. The most obvious situation is in the congenital defect where there are no external ear canals. Another condition is in chronic middle ear infection. If there is a hole in the tympanic membrane the ear may drain during upper respiratory infections or if the patient get water in his/her ear. Some ears drain when the ear canal is occluded with the ear-mould of a hearing aid. Chronic inflammation of the ear canal may also make it impossible to use a conventional air conduction hearing aid.
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Reference
Tjellström A, Håkansson B and Granstrom G (2001) Bone Anchored Hearing Aids. Current Status in Adults and Children. Otolaryngological Clinics of North America (eds.) Maniglia and Proops, WB Saunders Company, Philadelphia, Vol 34; number 2, 337–364
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© 2004 Springer-Verlag Tokyo
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Tjellström, A. (2004). The BAHA — Direct Stimulation of the Temporal Bone. In: Suzuki, JI., Kobayashi, T., Koga, K. (eds) Hearing Impairment. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68397-1_43
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DOI: https://doi.org/10.1007/978-4-431-68397-1_43
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-22326-9
Online ISBN: 978-4-431-68397-1
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