Spiral-blade insertion instrument

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/90 (2006.01) A61B 17/17 (2006.01) A61B 17/78 (2006.01)

Patent

CA 2326393

The invention relates to a device for introducing a spiral blade into an intramedullary nail. The device includes a target-finding stay with a through hole, a guide sleeve attached coaxially in relation to the through hole, and a mandrel which is able to slide in the guide sleeve. The spiral blade is removable attached to the front end of the mandrel. The peripheral surfaces of the mandrel and the through hole of the guide sleeve have engaging mechanisms that interact with each other in such a way that the mandrel can be moved in the through hole of the guide sleeve only in a screw-like manner. An axially movable tissue-protective sleeve can be attached coaxially in relation to the mandrel.

L'invention concerne un dispositif permettant d'introduire une lame spiroïdale dans un clou médullaire, qui comprend un étrier cible (1), un alésage (5) situé à une extrémité (2) de l'étrier cible (1) et allant de la face intérieure (3) à la face extérieure (4), un manchon de guidage (8) fixé coaxialement à l'alésage (5) et présentant un axe médian (18) et un tourillon (9) pouvant coulisser dans le manchon de guidage (8). La lame spiroïdale (12) est montée amovible à l'extrémité avant (10) du tourillon (9). Le tourillon (9) comporte sur sa surface périphérique (17) et le manchon de guidage (8), dans l'alésage (70), des éléments (50; 51) qui s'engrènent mutuellement, afin que le tourillon (9) ne puisse être déplacé dans l'alésage (70) du manchon de guidage (8) qu'à la manière d'une vis dans le sens de l'axe médian (18). Un manchon de protection tissulaire (30) déplaçable dans le sens axial peut également être disposé, si nécessaire, coaxialement au tourillon (9).

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