Surgery – Instruments – Orthopedic instrumentation
Patent
1991-12-05
1993-09-07
Apley, Richard J.
Surgery
Instruments
Orthopedic instrumentation
606 53, 606 73, 411385, A61F 502
Patent
active
052424456
ABSTRACT:
A one piece item of stainless steel or other material suitable for permanent placement in the human body, forms the eye and shaft of an eyebolt by a combination of two shell-like portions, each having threaded bosses at distal ends thereof. The distal ends are placed around a spinal rod simultaneously with insertion of one of the shell-like portions through the yoke of a spinal column connecting hook device. Then the bosses are brought toward each other and the two bosses combine to form a bolt on which a nut is received and advanced along the threads. As this is done, it forms the eye of the eyebolt and it is brought into cooperation with the hook device to clamp tightly on a spinal rod with which the eyebolt is used. The two threaded bosses have interfitting, and thus mating, rib and groove to establish and maintain alignment of the threads of the two bosses to facilitate reception of the nut on the bosses. Thus, the connecting hook device can be installed and clamped to a spinal rod between other devices already installed on the spinal rod, without disturbing the other devices. Upon removal of the nut from the bosses, the eyebolt can be completely removed from the spinal rod without disturbing any other device attached to the spinal rod.
REFERENCES:
patent: 4032155 (1977-06-01), Thomas
patent: 4641636 (1987-02-01), Cotrel
patent: 4648388 (1987-03-01), Steffee
patent: 4813109 (1989-03-01), McCully et al.
patent: 4815453 (1989-03-01), Cotrel
patent: 5122131 (1992-06-01), Tsou
Danek Surgical Technique Manual TSRH.TM.Spinal Implant System, by Danek Medical, Inc. Feb. 1, 1990.
Universal Instrumentation (CD) for Spinal Surgery, by Drs. Cotrel and Dubousset, published by Stuart of Greensburg, Pa. 15601 (19 pages).
DANEK Luque II Spinal System, published by Danek Medical, Inc., Feb. 1, 1990.
Apley Richard J.
Danek Medical Inc.
Dvorak Linda C. M.
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