External bone fixation device

Details External bone fixation device External bone fixation device

1993-04-14

1994-05-24

Graysay, Tamara L.

Surgery

Instruments

Orthopedic instrumentation

606 59, A61B 1760

Patent

active

053144260

ABSTRACT:
The invention relates to a unilateral external bone fixation device which can be readily adapted for carrying out either bone transport or bone lengthening procedures, the device comprising a non-rotatable rigid shaft 11 having a central bore 12 extending therethrough, and being longitudinally displaceable along the central axis of the device, and a plurality of clamp carrier housings 13, 14 15 co-axially supported along the length of the shaft 11, one of the housings 14 being fixed to the shaft so as to be movable therewith, each said housing having connected thereto an orthopedic pin clamp assembly, a lead screw 19 housed within the bore of the shaft 11, and having a thread mating with a thread in the shaft bore, arranged and constructed so that upon rotation of the lead screw 19, the shaft 11 is displaced longitudinally along with the housing 14, to in turn cause an adjustment in the axial distances between the confronting ends of the housing 14 and at least one of the housings 13,15. In the bone transport mode of use, housings 13, 15 remain fixed with respect to the lead screw 19, whilst in the bone lengthening more of use, only one housing 13 is held fixed with respect to the lead screw, the two other housings 14,15 moving, upon adjusted rotation of the lead screw, in unison with the shaft.

REFERENCES:
patent: 2024325 (1935-12-01), Allen
patent: 2056749 (1936-10-01), Thomas
patent: 4475546 (1984-10-01), Patton

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