BACKBONE DISTRACTOR Russian patent published in 1997 - IPC

FIELD: neurosurgery. SUBSTANCE: backbone distractor is designed for fixation of backbone during operational treatment of its injuries and diseases. Distractor contains two collapsible supporting brackets 1,2 with working fixing members, one of which is installed on guiding spindle 5 for displacement relative to the other guiding member in longitudinal direction, and displacement mechanism made in the form of axial cylindrical bushing with inner thread fit for screw guiding member of movable bracket. Working surfaces of fixing members bear stopping projections 7. Drive for mechanism of displacement of brackets on axial cylindrical bushing 4 located between brackets has openings fit to key rod 8. In addition, working surfaces of fixing members can be shaped, in dependence on their destination, both as triangular plates with concave sides and stopping projections in the form of rods in its corners, and as rectangular elongated plates with, installed on it, stopping projections made in the form of spines arranged on one straight line. EFFECT: improved design. 5 dwg