发明名称 An embolic protection device
摘要 An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body of the guidewire (101) for retrieval. The filter element (105) may conveniently be mounted on a tubular sleeve (104) which is slidable and rotatable on the guidewire (101) between spaced-apart stops (106, 120) on the guidewire (101) which allows some manipulation of the guidewire independently of the filter when the filter is in use. The filter element comprises between 200 and 500 outlet openings with an average dimension of between 50 and 200 microns. The openings are sized such that the shear stress imparted to blood moving through said filter element at physiological flow rates less than about 800 Pa.
申请公布号 AU3844199(A) 申请公布日期 2000.11.21
申请号 AU19990038441 申请日期 1999.05.07
申请人 SALVIAC LIMITED 发明人 PAUL GILSON;EAMON BRADY;MICHAEL GILVARRY
分类号 A61F2/01 主分类号 A61F2/01
代理机构 代理人
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