Surgery – Truss – Perineal
Patent
1985-01-11
1987-10-06
Swiatek, Robert P.
Surgery
Truss
Perineal
128 92YY, 128 92YK, A61F 504
Patent
active
046975853
ABSTRACT:
An appliance for fixing fractures of the comprises an intramedullary nail for implantation in the intramedullary canal of the femur, a cross nail mountable on the intramedullary nail to extend through the neck of the femur and into the head of the femur and a locking screw that screws into a bore formed in the cross nail to fix the cross nail to the intramedullary nail. A D-shaped aperture is formed through the cross nail to receive the intramedullary nail therethrough and the intramedullary nail has a trifoliate cross section to co-act with the straight side of the aperture to prevent turning of the intramedullary nail in the aperture. A slit is formed longitudinally through the wall of the intramedullary nail and the bore that receives the locking screw is aligned with the slit so that a tapered nose of the locking screw will enter and expand the intramedullary nail into locking engagement with portions of the cross nail extending about the D-shaped aperture. The length of the locking screw is selected to engage the nose thereof with the inside surface of the intramedullary nail and lock the locking screw to the cross nail. Holes are formed through lower portions of the intramedullary nail to receive screws that fix lower portions of the intramedullary nail to lower portions of the femur.
REFERENCES:
patent: 2136471 (1938-11-01), Schneider
patent: 2406987 (1946-09-01), Anderson
patent: 2675801 (1954-04-01), Bambara et al.
patent: 2821979 (1958-02-01), Cameron
patent: 2947308 (1960-08-01), Gorman
patent: 3561437 (1971-02-01), Orlich
patent: 3893196 (1975-07-01), Hochman
patent: 4261351 (1981-04-01), Scherfel
patent: 4404693 (1983-09-01), Zweymuller
patent: 4457301 (1984-07-01), Walker
patent: 4475545 (1984-10-01), Ender
German Document No. 0118778, Howmedica Internat'l Inc. published Sep. 19, 1984.
German Document No. DE-A-3 244243, Ender, published Jun. 9, 1983.
Hakomaki J. R.
Swiatek Robert P.
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