Surgery – Truss – Perineal
Patent
1982-11-16
1984-12-18
Frinks, Ronald L.
Surgery
Truss
Perineal
128 84B, 128 92E, A61F 504, A61B 1718
Patent
active
044885423
ABSTRACT:
A device for external correction and setting of the bone parts at the site of a fracture, comprising a rigid rod, adjustable in length, with two holders which carry a plurality of transcutaneous pins. Each of the holders is rotatable in two planes that are disposed at right angles relative to each other. On each holder an arc-shaped guide is provided in a plane parallel to the axis of the rod. Each guide has a radius which approximately corresponds to the presumed distance between the center of the bone and the arc-shaped guide. The arc-shaped guides are provided with worm wheel teeth, and a worm is mounted in each of the holder parts for engagement with the teeth. Each of the holders is a two-part assembly, having a first part fastened to the rod above the arc-shaped guide and a second part carrying the pins and rotatably connected to the first part about an axis of rotation disposed at a right angle in relation to the axis of the curved guide. The pins are disposed at an acute angle in relation to the axis of rotation of the second part of the holder. The centerlines of the pins intersect said axis of rotation at the latter's point of intersection with the axis of the arc-shaped guide.
REFERENCES:
patent: 2250417 (1941-07-01), Ettinger
patent: 2333033 (1943-10-01), Mraz
patent: 2391537 (1945-12-01), Anderson
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