Intramedulary bone-setting assembly

Details Intramedulary bone-setting assembly Intramedulary bone-setting assembly

1982-02-08

1984-08-28

Apley, Richard J.

Surgery

Truss

Perineal

128 92B, 128 92R, 403 47, A61F 504

Patent

active

044677944

ABSTRACT:
A bone-setting assembly essentially comprised of a pair of tubular members adapted to be inserted in the intramedullary passages of the respective parts of a broken bone, and a central connecting and aligning pin that is arranged to be slidably received in the interior passages of the tubular members. The tubular members are driven into position in the bone passages and a portion of the exterior surface of each member is roughened to firmly fix the member in the bone. The interior passages of the tubular members are preferably square in cross section and the central pin has a conforming square cross section so that there can be no relative rotation between the tubular members and thus between the parts of the broken bone. The central pin is threaded over approximately half of its length and a nut is threaded on this portion of the pin. After the tubular members have been positioned in the respective parts of the broken bone, the central pin is inserted in one of the members with only the end of its threaded portion extending outwardly from the tubular member and having the nut threaded thereon. The central pin is then advanced longitudinally into the other tubular member by turning the nut and this advance continues until the nut reaches the end of the threaded portion of the pin at which time approximately half of the pin will be positioned in each tubular member.

REFERENCES:
patent: 3744488 (1973-07-01), Cox
patent: 4016874 (1977-04-01), Maffei et al.
patent: 4187841 (1980-02-01), Knutson
patent: 4262665 (1981-04-01), Roalstad et al.

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