Anatomic external fixation system for the ankle

摘要

An external fixator system includes a proximal frame configured to restrict motion in a lower extremity of a subject, and a frame connector assembly. The proximal frame includes a first, second, and third component. The first component can support a first clamp to secure a first pin inserted within a bone extending between a foot and a knee of the lower extremity. The third component extends from a second end of the second component. The first, second and third components have longitudinal axes that are substantially coplanar. The third component includes an extension to extend over a dorsal portion of the foot of the subject and to support a second clamp to secure a second pin inserted within a bone of the foot. The frame connector assembly extends from the second component to support a third clamp to secure a third pin inserted within a third bone of the foot.

主权项

1. An external fixator system, comprising:
a fastener assembly; a monolithic first fixation component extending between a first proximal end portion and a first distal end portion of the first fixation component, the monolithic first fixation component including a first pivot structure defining a first pivot channel configured to receive the fastener assembly, the first fixation component configured to support a first clamping device to secure a first bone pin inserted within a first bone extending between a foot and a knee of the lower extremity; a monolithic second fixation component extending between a second proximal end portion and a second distal end portion of the second fixation component, the monolithic second fixation component including a second pivot structure defining a second pivot channel configured to receive the fastener assembly, the second fixation component configured to support a second clamping device to secure a second bone pin inserted within a second bone of the foot; the fastener assembly including
a first fastening element defining a portion of a bone pin insertion channel, the first fastening element configured to extend through the first pivot channel defined by the first pivot structure and the second pivot channel defined by the second pivot structure, anda second fastening element defining a bore configured to receive and engage with the first fastening element to restrict movement between the first fixation component and the second fixation component; and a bone pin insertion channel defined by the first fastening element and the bore of the second fastening element and configured to allow a third bone pin to extend through the first fastening element, the second fastening element, the first pivot structure and the second pivot structure for insertion within a medial or lateral surface of a heel of the foot; a first frame connector extending from a proximal frame portion forming a third pivot structure, the third pivot structure including a third pivot channel that extends between the first pivot channel and the second pivot channel, and a distal frame portion including a first frame engagement feature; and a distal frame including a second frame connector including a plurality of second frame engagement features disposed along a longitudinal axis of the second frame connector, and a support frame extending from the second frame connector, the first frame engagement feature configured to be reversibly engaged to a selected second frame engagement feature such that a distance between the distal frame and the defined bone pin insertion channel may be adjusted based on the selection of the second frame engagement feature.