Incus short process attachment for implantable float transducer
A middle ear prosthesis coupling member is described that includes a transducer coupling element adapted for coupling to a mechanical signal transducer, and an ossicle fastener coupled to the transducer coupling element and adapted for secure attachment to the short process of the incus ossicle of a patient middle ear. The ossicle fastener includes parallel separated first and second fastener clips. Each fastener clip has two opposing bendable legs adapted for forming an interior region for receiving the short process of the incus ossicle and a relieved opening between opposing leg ends displaceably providing access for the incus ossicle to the interior region. The fastener clips securely enclose the short process of the incus ossicle within the interior region. The first fastener clip is adapted for exerting a force to pull the ossicle fastener toward the short process of the incus ossicle. The second fastener clip is adapted for holding the ossicle fastener in place over lateral movement on the short process of the incus ossicle only and without substantially exerting a force to pull the ossicle fastener toward the short process of the incus ossicle.
1. A middle ear prosthesis coupling member comprising:
a transducer coupling element adapted for coupling to a mechanical signal transducer; and
an ossicle fastener coupled to the transducer coupling element and adapted for secure attachment to a short process of an incus ossicle of a patient middle ear, the ossicle fastener including parallel separated first and second fastener clips, each fastener clip having:
i. two opposing bendable legs adapted to form an interior region for receiving the short process of the incus ossicle, and
ii. a relieved opening between opposing leg ends displaceably providing access for the incus ossicle to the interior region, so that the fastener clips are adapted to securely enclose the short process of the incus ossicle within the interior region;
wherein the first fastener clip is adapted for exerting a force to pull the ossicle fastener toward the short process of the incus ossicle; and
wherein the second fastener clip is adapted for holding the ossicle fastener in place over lateral movement on the short process of the incus ossicle only and without substantially exerting a force to pull the ossicle fastener toward the short process of the incus ossicle;
whereby the prosthesis coupling member is adapted to couple vibration generated by the mechanical signal transducer to the short process of the incus.
2. A middle ear prosthesis coupling member according to claim 1 , wherein the first fastener clip is adapted for coupling to a tip end of the short process of the incus and the second fastener clip is adapted for coupling to a body end of the short process of the incus.
3. A middle ear prosthesis coupling member according to claim 2 , wherein the legs of the first fastener clip are shorter than the legs of the second fastener clip.
4. A middle ear prosthesis coupling member according to claim 2 , further comprising a wing between the legs of the first fastener clip for secure gripping and fixation on the short process of the ossicle bone with a surgical tool.
5. A middle ear prosthesis coupling member according to claim 1 , wherein each leg has a rectangular cross-section with a long side adapted to face an outer surface of the short process of the incus ossicle.
6. A middle ear prosthesis coupling member according to claim 1 , wherein each leg has an oval cross-section with a long diameter parallel to the semi-major axis side adapted to face an outer surface of the short process of the incus ossicle.
7. A middle ear prosthesis coupling member according to claim 6 , wherein the two opposing bendable legs of each fastener clip encloses an angle more than 0°.
8. A middle ear prosthesis coupling member according to claim 7 , wherein the angle is 35°.
9. A middle ear prosthesis coupling member according to claim 1 , wherein leg ends of the opposing bendable legs at the relieved opening extend apart forming a guide for temporary pushing apart the leg ends when clipping onto the incus ossicle.
10. A middle ear prosthesis coupling member according to claim 1 , wherein the transducer coupling element and the ossicle fastener are perpendicular to each other.
11. A middle ear prosthesis coupling member according to claim 1 , wherein the mechanical signal transducer is directly fixated to the ossicle fastener.
12. A middle ear prosthesis coupling member according to claim 1 , wherein the coupling element includes a plurality of clamping fingers adapted for secure engagement to an outer surface of an enclosed mechanical signal transducer.
13. A middle ear prosthesis coupling member according to claim 1 , wherein the coupling element includes a mechanical vibration conducting elongate member for coupling vibration generated by the mechanical signal transducer to the prosthesis coupling member; the mechanical signal transducer being separate from the prosthesis coupling member.
14. A middle ear prosthesis coupling member according to claim 13 , wherein the vibration conducting elongate member is a rod with one end coupled to the prosthesis coupling member and the other end coupled to an outer surface of the mechanical signal transducer.
15. A middle ear prosthesis coupling member according to claim 14 , wherein the rod is coupled with a hinge.
16. A middle ear prosthesis coupling member according to claim 13 , wherein the vibration conducting elongate member is a liquid filled hose.
17. A middle ear implant system including a prosthesis coupling member according to any of claims 1 - 16 .