Apparatus and method for delivering fasteners during valve...

A - Human Necessities – 61 – B

Patent

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A61B 17/068 (2006.01) A61B 17/064 (2006.01)

Patent

CA 2587660

A fastener delivery tool (2) includes a loading chamber for receiving a fastener (6) having a pair of tines (6a, 6b) overlapping one another to define a loop (6c) in a parent or relaxed state. A retaining member (20) retains the fastener in the loading chamber (7). The fastener delivery tool also includes a tongue (26), pusher member (30), and an ejection track (23) communicating with the loading chamber. An actuator (12) causes the tongue (26) to move to engage the tines (6a, 6b) of the fastener (6) to transform the fastener (6) from the relaxed state to a constrained state defining a U-shape. The actuator (12) also causes the pusher member (20) to release the retaining member and advance the fastener down the ejection track in the constrained state. The tool (2) also includes a trigger for ejecting the fastener completely from the ejection track. The fastener may be used to secure a prosthetic heart valve or components thereof into surrounding tissue, e.g., within a tissue annulus.

L~invention concerne un outil de fourniture de fixation (2) comprenant une chambre de chargement pour recevoir une fixation (6) ayant une paire de dents (6a, 6b) se chevauchant pour définir une boucle (6c) dans un état parent ou relâché. Un élément de retenue (20) maintient la fixation dans la chambre de chargement (7). L~outil de fourniture de fixation comprend également une languette (26), un élément poussoir (30) et une piste d~éjection (23) communicant avec la chambre de chargement. Dans le procédé de l~invention un actionneur (12) fait se déplacer la languette (26) pour s~engager dans les dents (6a, 6b) de la fixation (6) pour transformer la fixation (6) de l~état relâché à un état de contrainte définissant une forme de U. L~actionneur (12) conduit également l~élément poussoir (20) à libérer l~élément de retenue et faire avancer la fixation vers le bas de la piste d~éjection en état de contrainte. L~outil (2) comporte également une détente pour éjecter la fixation complètement de la piste d~éjection. La fixation peut s~utiliser pour sécuriser une prothèse de valve cardiaque ou des composants de celle-ci dans le tissu environnant, par exemple par un élément annulaire de tissu.

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