Loop attachment to apertured device

Details Loop attachment to apertured device Loop attachment to apertured device

A - Human Necessities

61

F

A61F 2/08 (2006.01) A61B 17/04 (2006.01) D04G 5/00 (2006.01)

Patent

CA 2289555

A winding device (10) for use in the simultaneous formation and attachment of a loop (11) to an apertured implantable device (12), in which the loop is formed from a loosely structured fibre bundle of twisted yam, and the device (12) has first and second apertures (13, 14) through which the loop can be taken, and comprising: withdrawing a leading end of yam from a yam supply (15, 18, 21) and feeding the leading end through the first aperture (13) in one direction, and through the second aperture (14) in an opposite direction; taking the leading end of yam away from the device (12) and along a guide path formed by rotatable capstans (16) so as to form a basic loop; withdrawing further yam from the supply simultaneously with applying movement of the basic loop along the guide path so as to apply successive loop turns to the basic loop and therefore form a progressively increasing loop core; and applying relative twists between the loop core and each successive loop tum so as to form a cohesive looped fibre bundle attached to the device. The method is particularly suitable for use in the automated production and attachment of a loop to an implantable device (12) used in the implantation of a prosthetic ligament.

La présente invention concerne un dispositif de bobinage (10) destiné à la formation et à la fixation simultanées d'une boucle (11) sur un implant (12) perforé, dans lequel la boucle est formée d'un faisceau de fibres, faiblement structuré, de fil retors. L'implant (12) comprend des premières et secondes ouvertures (13,14) au travers desquelles la boucle peut se former. Cette formation de boucle comprend, la préhension de l'extrémité avant d'un fil, à partir d'un approvisionnement en fil (15,18,21), son introduction, dans un sens, dans la première ouverture (13) puis, dans le sens opposé, dans la seconde ouverture (14), et son éloignement du dispositif (12) pour l'amener, le long d'un parcours de guidage assuré par des cabestans rotatifs (16), à terminer la boucle de base. L'application du même parcours à une préhension simultanée de fil supplémentaire, permet de réaliser des tours de boucle successifs et de constituer ainsi progressivement un amas de boucles. De plus, la formation de torsions, entre l'amas de boucles et chaque tour successif de boucle, permet d'obtenir un faisceau de fibres en boucles, fabriqué avec cohésion, et fixé à l'implant. Le procédé convient bien à la production et à la fixation automatisées de boucle sur un implant (12) destiné à servir de ligament prosthétique.

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