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US 8,894,663 B2Granted
Remotely adjustable tissue displacement device
AssigneeDePuy Synthes Products, Inc.
InventorsLukas Giger, Bruno Laeng, Hugo Flueckiger, Markus Hunziker
Life of this patent
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Abstract
The invention relates to an apparatus for displacing tissue within the body, wherein the apparatus includes two or more attachment members selectively displaceable with respect to each other via a driving member. The driving member preferably is rotatable and is caused to rotate by a magnetic actuator that can be activated by a magnetic field from outside the body.
Claims8
A bone displacement apparatus comprising:
- a first bone attachment member;
- a second bone attachment member;
- and a displacement mechanism configured for subcutaneous implantation in a position accessible by a magnetic field transmitted through skin, the displacement mechanism comprising a rod operatively coupled to the first bone attachment member, a drive member operatively attached to the rod, the drive member having first screw threads, a tubular member operatively coupled to the second bone attachment member, an inner surface of the tubular member having second screw threads to engage the first screw threads, and a magnet rotatable back and forth in opposite directions, wherein when an external rotating magnetic force is applied to a magnet, the rod moves in a displacement direction in accordance with a rotational interaction of the first screw threads and second screw threads, wherein the drive member is driving by a ring having a tab that contacts a tooth of the drive member.
Dependencies are inferred from the claim text.