Spinal correction system actuators

摘要

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.

主权项

1. 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; anda dual roller clutch mechanism coupled to the piston unit such that displacement of the piston unit in the first direction causes a rotational force on the dual roller clutch mechanism; 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 dual roller clutch mechanism and a second end configured to be coupled to the correction anchor such that displacement of the dual roller clutch mechanism causes shortening of the effective length of the connector.