Orthopaedic device, especially for the gradual correction of...

A - Human Necessities – 61 – B

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A61B 17/60 (2006.01) A61B 17/66 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2161535

A device for the gradual correction of a bone fracture which has already been set in the operating theatre comprises an elongated struc- ture (I) which defines a longitudinal axis (L) which can be positioned parallel to the bone and comprises a pair of end supports (10, 11 ) re- leasably anchored to corresponding bolt-bearing end clamps (6, 7) of an external fixation unit (2) which has already been fitted to the fractured pieces (F1, F2), a central body (24) connected to supports (10, 11) by connection means formed by longitudinal (32) and transverse (25) adjust- ment means to correct the longitudinal distance and transverse offset between the supports re- spectively, angular adjustment means (39) to correct the relative inclination of one of the supports with respect to the longitudinal axis (L) rotating it about a transverse axis (T), and centering means (40, 49, 50, 51) to align the transverse axis (T) with the centre of the frac- ture. The transverse axis (T) is perpendicular to the plane of action of the longitudinal (32) and transverse (25) adjustment means.

L'invention se rapporte à un dispositif conçu pour réduire graduellement une fracture osseuse qui a déjà été traitée en salle d'opération, ce dispositif comprenant une structure allongée (1) qui forme un axe longitudinal (L) pouvant être positionné parallèlement à l'os, et qui comprend une paire de supports terminaux (10, 11) fixés de manière libérable à des dispositifs de serrage terminaux (6, 7) supportant des boulons d'une unité de fixation externe (2) déjà appliquée sur les parties fracturées (F1, F2), un corps central (24) raccordé aux supports (10, 11) par un moyen de raccordement formé par des éléments de réglage longitudinal (32) et transversal (25) afin de corriger la distance longitudinale et le décalage transversal entre les supports, respectivement, un moyen (39) de réglage angulaire destiné à corriger l'inclinaison relative d'un des supports par rapport à l'axe longitudinal (L) tournant autour d'un axe transversal (T), et un dispositif de centrage (40, 49, 50, 51) destiné à aligner l'axe transversal (T) sur le centre de la fracture. L'axe transversal (T) est perpendiculaire au plan d'action des éléments de réglage longitudinal (32) et transversal (25).

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