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US 2014/0236234 A1Published application
Spinal correction system actuators
AssigneeKspine, Inc.
InventorsRyan M. Kroll, Steven J. Seme, Thomas J. Gisel, Mark W. Kroll
Life of this patent
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Abstract
A spinal correction system for implantation in a patient, the system including a reciprocating adjuster and/or a resistance adjuster coupled to a stabilizing member, for example. The resistance adjuster includes a potential energy drive, a slide unit, and a resistance unit. The reciprocating adjuster includes a piston unit, a transfer unit coupled to the piston unit, and a return mechanism.
Claims31
A spinal correction system for implantation in a patient, the system comprising:
- a correction anchor configured to be secured to a vertebra in a defect area of a spine;
- a stabilizing member configured to be secured against translation at the defect area of the spine;
- a reciprocating adjuster coupled to the stabilizing member, the reciprocating adjuster including:
- a piston unit displaceable in a first direction, and
- a transfer unit coupled to the piston unit such that displacement of the piston unit in the first direction causes the transfer unit to be displaced in a second direction;
- and
- a connector extending from the reciprocating adjuster to define an effective length between the reciprocating adjuster and the correction anchor, the connector having a first end configured to be coupled to the transfer unit and a second end configured to be coupled to the correction anchor such that displacement of the transfer unit causes shortening of the effective length of the connector.
4 more elements
A method of correcting a spine, the method comprising:
- securing a correction anchor to a vertebra in a defect area of a spine;
- securing a stabilizing member against translation at the defect area of the spine;
- and
- displacing a piston unit of a reciprocating adjuster in a first direction to cause a transfer unit of the reciprocating adjuster to be displaced in a second direction, in turn, causing shortening of an effective length of a connector coupling the correction anchor and the reciprocating adjuster.
1 more element
A spinal correction system for implantation in a patient, the system comprising:
- a correction anchor configured to be secured to a vertebra in a defect area of a spine;
- a stabilizing member configured to be secured against translation at the defect area of the spine;
- a resistance adjuster coupled to the stabilizing member, the resistance adjuster including:
- a potential energy drive,
- a slide unit coupled to the potential energy drive such that the potential energy drive exerts a displacement force on the slide unit biasing the slide unit in a first direction, and
- a resistance unit coupled to the slide unit, the resistance unit being configured to selectively oppose the displacement force;
- and
- a connector extending from the resistance adjuster to define an effective length between the resistance adjuster and the correction anchor, the connector having a first end configured to be coupled to the slide unit and a second end configured to be coupled to the correction anchor such that displacement of the slide unit in the first direction causes shortening of the effective length of the connector.
5 more elements
A method of correcting a spine, the method comprising:
- securing a correction anchor to a vertebra in a defect area of a spine;
- securing a stabilizing member against translation at the defect area of the spine;
- and
- actuating a resistance unit of a resistance adjuster coupled to the stabilizing member such that the resistance adjuster selectively releases a displacement force provided by a potential energy drive coupled to a slide unit, the slide unit being displaced by the potential energy drive in a first direction to cause shortening in an effective length of a connector coupled between the resistance adjuster and the correction anchor.
1 more element
A spinal correction system for implantation in a patient, the system comprising:
- a correction anchor configured to be secured to a vertebra in a defect area of a spine;
- a stabilizing member configured to be secured against translation at the defect area of the spine;
- a resistance adjuster coupled to the stabilizing member, the resistance adjuster including:
- a potential energy drive including an expanding material configured to expand after being subjected to an internal body environment of the patient, and
- a slide unit coupled to the potential energy drive such that the potential energy drive exerts a displacement force on the slide unit biasing the slide unit in a first direction, and
- a connector extending from the resistance adjuster to define an effective length between the resistance adjuster and the correction anchor, the connector having a first end configured to be coupled to the slide unit and a second end configured to be coupled to the correction anchor such that displacement of the slide unit in the first direction causes shortening of the effective length of the connector.
3 more elements
Dependencies are inferred from the claim text.