Filter apparatus for ostium of left atrial appendage

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/01 (2006.01) A61B 17/00 (2006.01) A61B 17/12 (2006.01)

Patent

CA 2388600

Apparatus for permanent placement across an ostium of a left atrial appendage in a patient, which includes a filtering membrane configured to extend across the ostium of the left atrial appendage. The filtering membrane has a permeable structure which allows blood to flow through but substantially inhibits thrombus from passing therethrough. The apparatus also includes a support structure attached to the filtering membrane which retains the filtering membrane in position across the ostium of the left atrial appendage by permanently engaging a portion of the interior wall of the left atrial appendage. The support structure may be radially expandable from a first configuration to a second configuration which engages the ostium or the interior wall of the left atrial appendage. The filtering membrane may define an opening therethrough that is configured to expand from a first size which inhibits the passage of thrombus therethrough to a second size which allows an interventional device, e.g., an expansion balloon, to pass therethrough, and wherein the opening is resiliently biased towards the first size.

L'invention concerne un appareil destiné à être placé de manière permanente sur un ostium d'un appendice atrial gauche chez un patient. Cet appareil comprend une membrane de filtrage conçue pour s'étendre le long de l'ostium de l'appendice atrial gauche. Cette membrane de filtrage comporte une structure perméable permettant le passage du sang mais empêchant celui d'un thrombus. Ledit appareil comprend également une structure de support fixée à la membrane de filtrage. Cette structure de support permet de retenir la membrane de filtrage en position sur l'ostium de l'appendice atrial gauche et vient se loger de manière permanente dans une partie de la paroi interne de l'appendice atrial gauche. Ladite structure de support peut être radialement extensible entre une première configuration et une seconde configuration en prise avec l'ostium ou la paroi interne de l'appendice atrial gauche. La membrane de filtrage peut définir une ouverture conçue pour s'étendre entre une première taille empêchant le passage d'un thrombus et une seconde taille permettant le passage d'un dispositif d'intervention tel qu'un ballon d'expansion, ladite ouverture conservant naturellement la première taille sous l'effet d'une contrainte élastique.

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