Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Ear or nose prosthesis
Patent
1995-03-30
1996-08-13
Shay, Randy C.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Ear or nose prosthesis
607137, A61F 218, A61N 100
Patent
active
055452191
ABSTRACT:
An implantable cochlear electrode assembly includes an initially straight flexible rod-like electrode carrier and an initially straight flexible rod-like positioning member which extend in substantially parallel relation to and closely alongside each other. The assembly is inserted endwise into the scala tympani of the cochlea so as to adopt the spiral curvature of the cochlea, with the positioning member being disposed at that side region of the electrode carrier which faces the outer wall of the cochlea and is opposite to the side region of the electrode carrier at which the contact faces of the array of electrodes are exposed. The electrode carrier and the positioning member are connected to each other at their respective leading and trailing end regions but are separate from and unconnected to each other over their entire medial regions, so that the positioning member can assume an outwardly arched configuration relative to the electrode carrier for forcing the latter into a close hugging engagement with the modiolus and for disposing the contact faces of the electrodes in as close a juxtaposition to the cells of the spiral ganglion as possible. With the trailing end region of the positioning member locked to the trailing end region of the electrode carrier, a stable implantation of the assembly is achieved.
REFERENCES:
patent: 4284085 (1981-08-01), Hansen et al.
patent: 4819647 (1989-04-01), Byers et al.
patent: 4832051 (1989-05-01), Jarvik et al.
patent: 5000194 (1991-03-01), van den Honert et al.
patent: 5037497 (1991-08-01), Stypulkowski
W. Bruszewski et al., "Injection Molded Structural Spine," 1994 RETEC:R94-034, pp. 2-20 and Figs. 1-12, Studies on Pediatric Auditory Prosthesis Implants, 15th Quarterly Progress Report, Apr. 1, 1994 to Jun. 30, 1994, from Coleman and Epstein Laboratories, University of California, San Francisco.
Kuzma et al., U.S. Pat. Appln. Ser. No. 08/211,269, "Self-Curving Cochlear Electrode Array," filed May 4, 1994.
Cochlear Ltd.
Shay Randy C.
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