Surgical instrument

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/15 (2006.01)

Patent

CA 2240481

A surgical instrument apparatus (10) includes an elongated alignment rod (11) that can enable a surgeon to define alignment with a patient's long bone. An instrument block body (16) can slide upon the alignment rod (11) between its end portions (12, 13). A locking member forms a connection with the rod at a selected position along the rod. The locking member includes a cam locking arrangement (25) that rotates about a pivot (24) on the instrument body. The cam has a handle portion or arm (28) that enables a user to rotate the cam and its locking tab about its pivot. Part of the locking cam includes a locking tab having a slot (37) that extends circumferentially about ninety degrees around the pivot of the cam. The slot is positioned radially in between the pivot and the periphery of the locking member at a locking member bearing surface. The open end portion (40) of the slot communicates with the locking member periphery.

L'instrument chirurgical (10), selon l'invention, comprend une longue tige d'alignement (11) qui permet au chirurgien de définir l'alignement avec un os long d'une jambe du patient. Un corps de bloc (16) de l'instrument peut coulisser sur la tige d'alignement (11) entre les portions d'extrémité (12, 13) de celle-ci. Un élé ment de verrouillage s'engage avec la tige au niveau d'une position choisie le long de celle-ci. L'élément de verrouillage comporte un dispositif de verrouillage à came (25) qui tourne autour d'un pivot (24) sur le corps de l'instrument. La came a une poignée ou un manche (28) qui permet à l'utilisateur de tourner la came et sa languette de verrouillage autour de son pivot. Une partie de la came de verrouillage comprend une languette de verrouillage ayant une fente (37) qui s'étend circonférentiellement sur 90· environ autour du pivot de la came. La fente se trouve radialement entre le pivot et la périphérie de l'élément de verrouillage, au niveau d'une surface d'appui de l'élément de verrouillage. La portion d'extrémité ouverte (40) de la fente communique avec la périphérie de l'élément de verrouillage.

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