Transconnector for coupling spinal rods

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/70 (2006.01)

Patent

CA 2366779

The present invention is directed to a transconnector (10) for coupling first and second spinal fixation rods or other elongate fixation elements (12; 14). The transconnector (10) includes a male member (16), a female member (18), and a locking member (20). The male member (16) has a body with a linking element (22) (such as a hook) associated with the lateral end for receiving one of the fixation elements (12; 14), and a projection (24) on the medial end. The projection (24) includes a recess (32) defined by lateral and medial walls (34; 36). The female member (18) has a body with a linking element (26) associated with the lateral end for receiving the other fixation element (12; 14), and a cavity (28) with an opening (30) on the medial end for receiving a portion of the male member projection (24). The locking member (20) secures the position and orientation of the male member projection portion in the cavity (28) in order to accommodate different separation distances and orientations between the first and second fixation elements (12; 14). The locking member (20) cooperates with the medial wall of the recess (32) of the projection (24) to prevent uncoupling of the male and female members (16; 18). The male member (16) may be made as a two component assembly in which the two components can rotate relative to one another for accommodating rod convergence or divergence.

La présente invention porte sur un transconnecteur (10) servant à coupler une première et une seconde broche spinale de fixation ou d'autres éléments de fixation allongés (12, 14). Le transconnecteur (10) comprend un élément mâle (16), un élément femelle (18) et un élément de verrouillage (20). L'élément mâle (16) est constitué d'un corps muni d'un élément de liaison (22) (tel qu'un crochet) associé à l'extrémité latérale de manière à recevoir l'un des éléments de fixation (12, 14), et d'une projection (24) située sur l'extrémité médiane. La projection (24) comprend un évidement (32) délimité par des parois latérales et médianes (34, 36). L'élément femelle (18) est constitué d'un corps muni d'un élément de liaison (26) associée à l'extrémité latérale de manière à recevoir l'autre élément de fixation (12, 14), et d'une cavité (28) comportant une ouverture (30) située sur l'extrémité médiane et permettant de recevoir une partie de la projection (24) de l'élément mâle. L'élément de verrouillage (20) oriente et immobilise la partie de la projection de l'élément mâle dans la cavité (28) de manière à établir des distances de séparation et des orientations différentes entre le premier et le second élément de fixation (12, 14). L'élément de verrouillage (20) et la paroi médiane de la rainure (32) de la projection (24) permettent d'éviter un découplage des éléments mâle et femelle (16, 18). L'élément mâle (16) peut être constitué d'un assemblage de deux éléments, ces deux éléments pouvant tourner l'un autour de l'autre pour permettre la convergence ou la divergence des broches.

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