Surgery – Instruments – Orthopedic instrumentation
Patent
1994-10-14
1996-10-29
Tucker, Guy
Surgery
Instruments
Orthopedic instrumentation
606 86, 606169, A61B 1756
Patent
active
055692648
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This application is a 35 U.S.C. 371 application of PCT/FI96/00015 filed on Jan. 18, 1993.
The present invention relates to a surgical instrument for installation of a surgical implant in a living tissue, particularly in connection with a surgical operation. The installation instrument comprises a frame with an installation channel, in which the implant is inserted in the beginning of installation. The instrument further comprises an installation part arranged to be inserted in the installation channel and to convey an external force needed for the installation of the implant to the implant. The frame is placed in connection with the tissue in a manner that the implant is inserted in the tissue when it exits the installation channel at the installation end of the frame.
In the context of the present invention, living tissue refers particularly to bone, ligament, connective tissue, synovial or joint tissue, muscular tissue, as well as others. Further, important fields of applying the invention include corrective surgery of meniscal rupture as well as bone surgery as treatment of bone fractures. The installation instrument of the invention is suitable for use in arthroscopic surgery. In this invention, implant refers to a usually elongated macroscopic piece that is suitable to be surgically installed with a force effective thereon. The force moves the implant essentially in the direction of its largest dimension into the tissue.
BACKGROUND OF THE INVENTION
Implants of this kind typically include rod-shaped and arrow-shaped implants. As to arrow-shaped implants, reference is made to U.S. Pat. No. 4,873,976. This patent discloses an arrow-shaped implant and a method for its installation. The implant and method are to be used particularly in the repairing surgery of meniscal rupture. The implant is typically manufactured of at least martially bioabsorbable polymer material.
In surgery, it is generally known to use installation instruments, typically manufactured of metal, for installing macroscopic implants, such as rods, hooks, pins, bolts and the like. Such implants are used in living tissues to connect operated or damaged tissues with each other or with other tissues. In such surgical installation instruments, the implant is typically placed at the initial stage either in part or wholly inside an installation channel in the installation instrument. The implant is forced from the installation instrument into the tissue by tapping manually with a hammer. A special, typically piston-like, installation part conveys the force generated with the hammer to the implant and, thus, forces the implant to penetrate into the tissue. It is also known to use an application whereby the implant is forced into the tissue by one powerful, quick stroke effected on the implant. The stroke maybe produce mechanically, pneumatically, hydraulically or electromagnetically, for example.
However, the surgical installation instruments of prior art used for installation macroscopic implants into a tissue nave certain disadvantages. If the surgeon uses a manual installation instrument, he/she needs both of his/her hands for controlling the instrument. With one hand, the surgeon must support the frame of the surgical implant, wherein the surgical implant is inserted, at least partly, in the beginning of the installation operation. With the other hand, the surgeon must tap the hammer or a corresponding tool, thus directing the force required for the transmission of the implant and conveyed by an installation part into the implant. Consequently, the surgeon cannot use his/her own hands to keep in position that part or parts of the tissue that he/she will attach to each other with the implant. Thus, the surgeon must usually have an assistant who keeps the parts of the tissue in position. As a result, the direct feel of the surgeon to the reactions of the tissue is essentially diminished as the operation proceeds. If the surgeon alternatively uses an installation instrument which forces the implant by one stroke into
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patent: 3892232 (1975-07-01), Neufeld
patent: 4298074 (1981-11-01), Mattchen
patent: 4873976 (1989-10-01), Schreiber
patent: 5059206 (1991-10-01), Winters
patent: 5152765 (1992-10-01), Ross et al.
patent: 5180388 (1993-01-01), DiCarlo
Albrecht-Olsen Peter
Kristensen Gert
Tamminmaki Markku
Tormala Pertti
Biocon Oy
Tucker Guy
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