Tissue fastening devices and delivery means

Details Tissue fastening devices and delivery means Tissue fastening devices and delivery means

A - Human Necessities

61

B

A61B 17/08 (2006.01) A61B 17/064 (2006.01) A61B 17/068 (2006.01) A61B 17/04 (2006.01) A61B 17/122 (2006.01) A61B 17/128 (2006.01)

Patent

CA 2358387

A fastener (13) and fastener delivery device (73) for guiding, delivering and deploying the fastener (13) into tissue to provide sustained gripping forces and methods of use. The fastener (13) is curved with a spring-like or shape memory material (15) and gripping elements (14). The fastener (13) is resiliently straightened and loaded into a cartridge (7) within a needle (1). The needle (1) and cartridge (7) both contain a slit (2, 8), and the slits (2, 8) extend to the distal openings (16, 17) of the needle (1) and cartridge (7). When the slits (2, 8) are not aligned, out-of-phase with each other, the fastener (13) remains resiliently straightened in the needle (1). When the slits (2, 8) overlap, in-phase with each other, the fastener (13) resiliently curves and deploys from the slits (2, 8), elastically gripping adjacent tissue. The device (73) is free to be withdrawn, allowing the fastener (13) to slide out from the distal openings (16, 17) of both cartridge (7) and needle (1).

L'invention concerne une fixation (13) et un dispositif d'acheminement de fixations (73) destiné à guider, acheminer et déployer la fixation (13) dans un tissu pour assurer durablement l'effet de forces d'accrochage, de même qu'un procédé d'utilisation correspondant. La fixation (13) est incurvée au moyen d'un matériau de type ressort ou à mémoire de forme (15) et des éléments d'accrochage (14). La fixation (13) est tendue de manière souple puis chargée dans une cartouche (7) à l'intérieur d'une aiguille (1). L'aiguille (1) et la cartouche (7) comportent une fente (2, 8), lesdites fentes (2, 8) s'étendant jusqu'aux ouvertures distales (16, 17) de l'aiguille (1) et de la cartouche (7). Si les fentes (2, 8) ne sont pas alignées et présentent un décalage l'une par rapport à l'autre, la fixation (13) demeure tendue de manière souple dans l'aiguille (1). Si les fentes (2, 8) se chevauchent et ne présentent pas de décalage, la fixation (13) se plie de manière souple et se déploie à partir des fentes (2, 8), accrochant de façon élastique le tissu adjacent. Le dispositif (73) peut être librement retiré, permettant à la fixation (13) de coulisser pour sortir des ouvertures distales (16, 17) de la cartouche (7) et de l'aiguille (1).

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