Flexible intramedullary fixation rod

Surgery – Instruments – Orthopedic instrumentation

Patent

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Details

606 62, A61B 1758

Patent

active

050530356

ABSTRACT:
A flexible inramedullary fixation rod for fractured bones is provided having a length sufficient to extend a substantial distance on either side of a diaphyseal fracture site and a substantially circular core with radially disposed fins extending substantially along the full length thereof. The radii of the core and fins are such that the rod can pass through the bone's medullary canal and engage the inner, or endosteal, surface of the bone along line contacts, thereby allowing normal endosteal healing and intramedullary revascularization. The rod is constructed of a flexible, bio-compatible material, such as titanium, stainless steel, resorbable polymers (e.g., polylactic acid) or carbon fiber-polysulfone. The radii of the fins are selected to be substantially equal to the minimum radius of the medullary canal. The core radius is selected in accordance with the Young's and shear moduli associated with the bio-compatible material to provide a rod structural rigidity (bending and torsional) preferably between 0.1% and 10% of the inherent bone rigidity with the relationship between the rod bending and torsional rigidities preferably being substantially the same as the corresponding relationship for the intact bone. This causes natural stresses (bending and torsional) to be maintained at the fracture site, thereby promoting natural and therefore stronger healing of the fractured bone.

REFERENCES:
patent: 2518019 (1950-08-01), Kane
patent: 3208450 (1965-09-01), Abelson
patent: 3463158 (1969-08-01), Schmitt et al.
patent: 3530854 (1970-09-01), Kearney
patent: 3678925 (1972-07-01), Fischer et al.
patent: 3709218 (1973-01-01), Halloran
patent: 3716051 (1973-02-01), Fischer
patent: 3717146 (1973-02-01), Halloran
patent: 3739773 (1973-06-01), Schmitt et al.
patent: 3760802 (1973-09-01), Fischer et al.
patent: 3763855 (1973-10-01), McAtee
patent: 3783860 (1974-01-01), Burstein et al.
patent: 3892233 (1975-07-01), Vestby
patent: 3893196 (1975-07-01), Hochman
patent: 3977398 (1976-08-01), Burstein
patent: 3990438 (1976-11-01), Pritchard
patent: 4055172 (1977-10-01), Ender et al.
patent: 4091806 (1978-05-01), Aginsky
patent: 4103683 (1978-08-01), Neufeld
patent: 4135507 (1979-01-01), Harris
patent: 4169470 (1979-10-01), Ender et al.
patent: 4204531 (1980-05-01), Aginsky
patent: 4212294 (1980-07-01), Murphy
patent: 4227518 (1980-10-01), Aginsky
patent: 4237875 (1980-12-01), Termanini
patent: 4275717 (1981-06-01), Bolesky
patent: 4281649 (1981-08-01), Derweduwen
patent: 4313434 (1982-02-01), Segal
patent: 4446579 (1984-05-01), Inamori et al.
patent: 4452973 (1984-06-01), Casey et al.
patent: 4457301 (1984-07-01), Walker
patent: 4473069 (1984-09-01), Kolmert
patent: 4475545 (1984-10-01), Ender
patent: 4522202 (1985-06-01), Otte et al.
patent: 4541424 (1985-09-01), Grosse et al.
patent: 4574795 (1986-03-01), Georges
patent: 4621628 (1986-11-01), Brudermann
patent: 4622959 (1986-11-01), Marcus
patent: 4628920 (1986-12-01), Mathys, Jr. et al.
patent: 4632101 (1986-12-01), Freedland
patent: 4667664 (1987-05-01), Taylor et al.
patent: 4697585 (1987-10-01), Williams
patent: 4705027 (1987-11-01), Klaue
patent: 4756307 (1988-07-01), Crowninshield
patent: 4776330 (1988-10-01), Chapman et al.
patent: 4805607 (1989-02-01), Engelhardt et al.
patent: 4827917 (1989-05-01), Brumfield
patent: 4846162 (1989-07-01), Moehring
patent: 4854312 (1989-08-01), Raftopoulos et al.
patent: 4858602 (1989-08-01), Seidel et al.
patent: 4875474 (1989-10-01), Border
patent: 4875475 (1989-10-01), Comte et al.
patent: 4877019 (1989-10-01), Vives
patent: 4881535 (1989-11-01), Sohngen
Slide presentation given 05/28/89 at Canadian Conference of Orthopaedic Surgeons.
Excerpts of article handed out 05/28/89 at Canadian Conference of Orthopaedic Surgeons discussing use of fixation rods for treating fractured bones.
Sales brochures excerpts for fluted intramedullary rods distributed by 3M (Minnesota Mining & Mfg. Co.)

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