Patent ID: 8192488

Claim:
A casing configured for implantation into a cylindrically-shaped fenestration that pierces a wall of a cochlea of a subject, the casing comprising: a hollow, cylindrically-shaped collar having a diameter which exceeds a diameter of the fenestration; and a hollow, cylindrically-shaped sleeve that is: configured to be received into the fenestration; and fixed at one end to one side of the collar with the remainder of the sleeve extending outward from the collar; and wherein the sleeve includes at least one prong having an end that juts outward from the sleeve, the prong configured to engage an otic capsule bone about the fenestration to thereby lock the casing in the fenestration and the sleeve is pierced by at least one slit which begins at an end of the sleeve furthest from the collar and extends along the sleeve toward the collar.