DEVICE FOR OSTEOSYNTHESIS IN CASE OF FRACTURES OF PELVIC BONES Russian patent published in 2010 - IPC A61B17/68 A61B17/80 A61B17/90 

FIELD: medicine.

SUBSTANCE: device for osteosynthesis in case of fractures of pelvic bones contains fixing means, detachable guide and handle for introduction of fixing means into the bone. As fixing means serves a sprig made in form of flat titanium plate of rectangular section, which includes located on different sides of plate section with symmetric sharpening and shank end, and located between them section with blocking holes for blocking of proximal and distal fragments. Angle of symmetric plate sharpening equals 35-45°. Shank end is formed by made in plate symmetric lateral cuts, and has length constituting 0.1 of plate length. Axes of flocking holes are located symmetrically along longitudinal axis, perpendicular to plate plane. Detachable handle is made in form of rectangle with dead and through slots. Dead slot is made in butt end of handle beam, along its longitudinal axis and has depth equal to the depth of shank end, and non-circular section, corresponding to shank end section. Shank end is installed in dead slot for percussion action on sprig via beam while introducing sprig into fragments. Through slot is located perpendicular to longitudinal beam axis, at the distance from its butt end with dead slot, which constitutes 3/5-3/4 of beam length. Guide is made with support end and, perpendicular to it, bent end, in which through holes for trocars are made. Support end is installed in through slot of handle beam, has non-circular transverse section, corresponding to transverse section of through slot, and is fastened to beam by means of fastening screw. Bent end of guide is located parallel to sprig plate with coaxial location of holes for trocars in guide and corresponding blocking holes in sprig. Sprig plate thickness constitutes 0.3-0.5 of its width. Plate length is 10-11 times larger than its width. Beam length is 2-3 times larger than plate length. Length of bent guide end equals axial length of plate section, made with blocking holes, increased on value equal 3/5-3/4 of axial beam length. Diametre of holes in plate for blocking screws constitutes 0.5-0.7 of plate width.

EFFECT: invention ensures possibility of treatment by closed osteosynthesis of pelvic bones which have surface of considerable length, thickness and complicated relief, passing one or several sprigs through bone thickness, between two cortical layers of proximal and distal fragments of pelvic bones: iliac and/or pubic, and/or ischial, and/or iliac bone in oversacetabular area, and/or vertical fracture of acetabulum, fastening sprig to fractions of pelvic bones with blocking screws, passed through two cortical layers.

3 cl, 3 dwg