Occlusion instrument for closing a cardiac auricle and a...

A - Human Necessities – 61 – B

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Details

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

Patent

CA 2627408

The present invention relates to a self-expandable occlusion instrument (1) for closing a cardiac auricle in a patient~s heart, and to a method for producing such an instrument. The occlusion instrument (1) is composed of a lattice (10) of thin wires or filaments which is given a suitable shape by means of a forming and heat treatment process. The occlusion instrument (1) according to the invention is specifically made up of a proximal retention area (2), a distal retention area (3) and a middle area (5). To ensure that the occlusion instrument in the expanded and implanted state can be held particularly securely in the cardiac auricle of the patient without injuring the patient~s cardiac tissue, provision is made that the proximal retention area (2) has a flanged area (6) which, in the expanded state of the occlusion instrument (1), comes to bear against the inner walls of the auricle that is to be closed and establishes a force-fit connection with the inner walls of the auricle and thus holds the implanted and expanded occlusion instrument (1) in the auricle, while the distal retention area (3) closes the aperture of the auricle.

La présente invention concerne un instrument d'occlusion (1) auto-expansible conçu pour fermer une oreillette du cAEur d'un patient ainsi qu'un procédé de fabrication de cet instrument. L'instrument d'occlusion (1) est constitué d'un treillis (10) de minces fils ou fils métalliques qui prend sa forme correcte au moyen d'un procédé de façonnage et de traitement thermique. L'instrument d'occlusion (1) selon l'invention est constitué plus précisément d'une zone proximale de rétention (2), d'une zone distale de rétention (3) et d'une zone centrale (5). Pour pouvoir maintenir l'instrument d'occlusion de manière particulièrement sûre dans l'oreillette du cAEur du patient lorsqu'il est en position expansée et implantée sans léser les tissus cardiaques du patient, il est prévu selon l'invention de disposer dans la zone de rétention proximale (2) une zone rabattue (6) qui, lorsque l'instrument d'occlusion est en position expansée dans l'oreillette cardiaque à fermer, vient se placer contre la paroi intérieure de l'oreillette cardiaque et forme avec la paroi intérieure de l'oreillette cardiaque une liaison en correspondance mécanique qui maintient l'instrument d'occlusion (1) implanté et expansé dans l'oreillette cardiaque, la zone distale de rétention (3) fermant l'ouverture de l'oreillette cardiaque.

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