Attaching an implantable hearing aid microactuator

H - Electricity – 04 – R

Patent

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Details

H04R 25/02 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2250410

A microactuator (32) of an implantable hearing aid system (10) is secured within a casing (50) implanted into a fenestration (52) that pierces the promontory (18) of the otic capsule bone (31). The casing (50) includes a hollow sleeve (62) that has an outer surface (64) and a first end (66) that is received into the fenestration (52). The sleeve (62) also includes an inner surface (68) adapted to receive a barrel (74) of the microactuator (32). The casing (62) also includes a flange (76) that is integral with the sleeve (62) and projects outward from the outer surface (64) of the sleeve (62) about a second end (78) of the sleeve (62). Various means secure the sleeve (62) within the fenestration (52) such as screwing into the promontory (18) or clamping to the promontory (18). The casing may fasten the microactuator (32) to the casing (50) by a threaded attachment, with screws, with button-and- socket snap fasteners, or with a slotted tongue-and-groove lock. A dummy plug may replace the microactuator (32) should removal become necessary.

La microcommande (32) d'un appareil auditif implantable (10) est placée dans un boîtier (50) implanté dans une perforation (52) qui traverse le promontoire (18) de l'os de la vésicule auditive (31). Le boîtier (50) comprend une douille creuse (62) comportant une surface extérieure (64) et une première extrémité (66) introduite dans la perforation (52). La douille (62) comporte aussi une surface intérieure (68) conçue pour recevoir un barillet (74) de la microcommande (32). Le boîtier (50), qui comporte également une bride (76) solidaire de la douille (62), dépasse de la surface extérieure (64) de la douille (62), autour d'une deuxième extrémité (78) de la douille (62). L'invention décrit divers moyens de fixer la douille (62) dans la perforation (52), par exemple par vissage dans le promontoire (18) ou par serrage sur celui-ci. La microcommande (32) peut être fixée sur le boîtier (50) par filetage, par des vis, par des boutons pression ou par un dispositif de blocage à fente et à rainure et languette. On peut remplacer la microcommande (32) par un bouchon s'il y a besoin de la retirer.

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