Hearing loss conductive hearing loss sensorineural hearing loss

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Presentation transcript:

Hearing loss conductive hearing loss sensorineural hearing loss mixed hearing loss

Bone-anchored hearing aid (BAHA)

Middle ear transducer

Envoy ESTEEM: piezoelectric

MED-EL: electromagnetic Vibration Ossicular Prosthesis (VOPR)

Otologics: electromechanical

Cochlea implant Volta (1790): metal rods in his own ears with 50-volt circuit > “like a thick boiling soup” noise Djourno & Eyriès (1950s): the 1st direct stimulation of CN8 > “a roulette wheel” or “a cricket” sound House (1969): the 1st wearable implant > a single electrode designed to aid lip-reading Clark (1978): the 1st Australian multi-channel cochlear implant U.S. FDA approval for adult (1984) > 2 years (1990) > 18 months (1998) > 12 months (2002) Totally implantable cochlear implant (TIKI, 2005)

Basic Scheme

Advanced Bionics, US

Cochlear Ltd, Australia

MED-EL, Austria

Neurelec, France

New and future directions Bilateral implantation the ability to listen using the ear with the better signal-to-noise-ratio Sound localisation Binaural advantage of using the signal from both ears Hybrid electro-acoustic stimulation Totally Implantable Cochlear Implant (TIKI)

Take home message Types of hearing loss and aids