Devices for passive motion of joints under traction

Details Devices for passive motion of joints under traction Devices for passive motion of joints under traction

A - Human Necessities

61

B

A61B 17/56 (2006.01) A61B 17/64 (2006.01)

Patent

CA 2305465

A device (10) for generating passive motion of a joint while applying traction has a proximal bracket (12) for engaging a pin (14) drilled into a proximal bone adjacent to the joint and a distal bracket (16) for engaging a pin (18) drilled into a distal bone adjacent to the joint. The two brackets (12, 16) are connected by a tension hinge mechanism (22) which includes a hinge (20) for permitting relative rotational movement of the brackets (12, 16) and an adjustment mechanism (22). The adjustment mechanism (22) is configured to allow substantially continuous adjustment of the distance between the hinge (20) and at least one of the brackets (12 or 16) so as to apply tension across the joint. The adjustment mechanism (22) also includes a number of elastic elements (24) deployed so as to allow elastic variation of the distance between the two brackets (12, 16).

Ce dispositif (10), destiné à imprimer un mouvement passif à une articulation tout en exerçant une traction, est pourvu d'un support proximal (12) destiné à l'emboîtement d'une broche (14) insérée dans une partie proximale de l'os au voisinage immédiat de l'articulation ainsi que d'un support distal (16) destiné à l'emboîtement d'une broche (18) insérée dans une partie distale de l'os au voisinage immédiat de l'articulation. Les deux supports (12, 16) sont raccordés par un mécanisme d'articulation à sollicitation (22) comprenant un pivot d'articulation (20) autorisant un mouvement rotatif relatif des supports (12, 16) ainsi qu'un mécanisme de réglage (22). Celui-ci est conçu de manière à permettre d'adapter de manière quasiment ininterrompue la distance séparant le pivot (20) d'au moins l'un des supports (12 ou 16) et ce, afin d'exercer une certaine sollicitation sur l'articulation. Ce mécanisme de réglage (22) comporte également un certain nombre d'éléments élastiques (24) déployés de manière à permettre une variation souple de la distance existant entre les deux supports (12, 16).

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