Aortic occluder with associated filter and methods of use...

Details Aortic occluder with associated filter and methods of use... Aortic occluder with associated filter and methods of use...

A - Human Necessities

61

F

A61F 2/01 (2006.01) A61B 17/00 (2006.01) A61B 17/12 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2254831

This invention is a balloon arterial cannula and methods for filtering blood. The device generally includes a mesh (75) for filtering blood flowing within a blood vessel, particularly within an artery such as the aorta. A structure adapted to open and close the mesh within the blood vessel, a means to actuate the structure, a balloon occluder (65) which typically includes a flexible material enclosing a chamber. The methods generally include the steps of introducing a mesh into a blood vessel to capture embolic material, adjusting the mesh, if necessary, during the course of filtration, inflating the balloon occluder to occlude the vessel upstream of the mesh and thereafter deflating the balloon occluder, removing the mesh, and the captured foreign matter from the blood vessel. Additionally, visualization techniques are used to ensure effective filtration.

Canule artérielle à ballonnet et procédés de filtration sanguine. Le dispositif selon l'invention comprend un élément à mailles (75) permettant de filtrer le sang s'écoulant dans un vaisseau sanguin, en particulier dans une artère telle que l'aorte, une structure conçue pour ouvrir et refermer l'élément à mailles dans le vaisseau sanguin, un moyen d'actionnement de la structure et un dispositif d'occlusion à ballonnet (65) qui comprend généralement un matériau souple renfermant une chambre. Les procédés décrits consistent généralement à introduire un élément à mailles dans un vaisseau sanguin pour y capturer toute matière embolique, à ajuster cet élément, le cas échéant, en cours de filtration, à gonfler le ballonnet de manière à obstruer le vaisseau en amont de l'élément à mailles, et à dégonfler ensuite le ballonnet d'occlusion et à enlever l'élément à mailles et les matières étrangères qui y sont capturées du vaisseau sanguin. Des techniques de visualisation peuvent en outre être utilisées pour assurer une filtration efficace.

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