Surgery – Instruments – Orthopedic instrumentation
Patent
1990-08-03
1991-03-12
Hafer, Robert A.
Surgery
Instruments
Orthopedic instrumentation
606 59, 128 80R, A61F 504, A61F 300
Patent
active
049989359
ABSTRACT:
A foot and ankle supporting and orienting extension for an external fixation unit with pins driven into the tibia of a patient has a coupling member which can be separably connected to a pin holder of a fixation unit, a variable-length carrier one end of which is articulately connected to the coupling member by a first universal joint and the other end of which is articulately connected to one end of a variabele-length link by a second universal joint, and a cushioned sole-contacting brace which is articulately connected to the other end of the link by a third universal spherical joint. By properly selecting the mutual inclination of the coupling member, carrier, link and brace relative to each other and/or by properly selecting the length of the carrier and/or the link, the patient or another authorized person can move the cushion of the brace to an optimum position relative to the sole of a foot forming part of a leg wherein the tibia is pinned to a fixation unit. This ensures that the foot and the ankle can rest in an optimum orientation. The joints can be locked to prevent articulation of the carrier, coupling member, link and brace relative to each other as soon as the cushion of the brace assumes an optimum position relative to the sole.
REFERENCES:
patent: 594865 (1897-12-01), Fortney
patent: 1863188 (1932-06-01), Clash
patent: 2391537 (1945-12-01), Anderson
patent: 2393831 (1946-01-01), Stader
patent: 2406987 (1946-09-01), Anderson
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patent: 4621627 (1986-11-01), Debastiani
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patent: 4947835 (1990-08-01), Hepburn
"Manual de Osteosynthese", M. E. Muller et al. (Springer-Verlag, Berlin, Heidelberg New York, 1977), p. 311.
Brown Michael
Hafer Robert A.
Kontler Peter K.
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