Needle apparatus and methods for closing septal defects

Details Needle apparatus and methods for closing septal defects Needle apparatus and methods for closing septal defects

A - Human Necessities

61

B

A61B 17/00 (2006.01) A61B 17/12 (2006.01)

Patent

CA 2459709

Apparatus and methods for closing a septal defect including a flap of tissue partially detached from a septum of a heart. A needle is advanced through a patient's vasculature within a delivery apparatus until the needle is disposed within a first chamber adjacent the septum. The needle is directed through the flap of tissue until the needle is disposed within a second chamber opposite the septum. A filament attached to an intermediate region of the needle is pulled, thereby causing the needle to pivot about the intermediate region such that the ends of the needle straddle the septal opening. A locking element is secured to the filament to secure the flap of tissue against the septum, and the filament is cut. Alternatively, the filament is biased to coil to engage the flap of tissue and secure the needle against the septum to close the opening.

L'invention concerne des dispositifs et des procédés pour la fermeture de malformation septale, y compris en présence de pan de tissu partiellement détaché d'un septum du coeur. On fait avancer une aiguille dans un vaisseau, à l'intérieur d'un dispositif de fourniture, pour placer cette aiguille dans une première chambre adjacente au septum. L'aiguille est orientée, à travers le pan de tissu, jusqu'à son positionnement dans une seconde chambre opposée au septum. Un filament fixé à une zone intermédiaire de l'aiguille est alors tiré, faisant pivoter l'aiguille autour de ladite zone, de sorte que les extrémités de l'aiguille chevauchent l'ouverture septale. Un élément de blocage est fixé au filament, permettant de rabattre le pan de tissu contre le septum, puis on coupe le filament. On peut aussi contraindre le filament pour qu'il prenne la forme d'un enroulement qui rattrape le pan de tissu, et fixer l'aiguille contre le septum pour obturer l'ouverture.

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