Filter apparatus for ostium of left atrial appendage
First Claim
1. A method of filtering the flow of blood between an atrium and a left atrial appendage of a patient comprising:
- providing a filtering membrane having a permeable structure which allows blood to flow through the filtering membrane but substantially inhibits thrombus from passing therethrough, and a support structure attached to the filtering membrane configured to permanently engage a portion of an ostium and an interior wall of the left atrial appendage;
positioning the filtering membrane across the ostium by permanently engaging the portion of the interior wall of the left atrial appendage with the support structure; and
filtering blood flow through the ostium with the filtering membrane such that blood may flow through the filtering membrane while thrombus is substantially inhibited from passing therethrough, wherein the support structure comprises a plurality of retaining members, and wherein positioning the filtering membrane further comprises piercing the wall of the left atrial appendage with the retaining members.
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Accused Products
Abstract
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.
498 Citations
4 Claims
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1. A method of filtering the flow of blood between an atrium and a left atrial appendage of a patient comprising:
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providing a filtering membrane having a permeable structure which allows blood to flow through the filtering membrane but substantially inhibits thrombus from passing therethrough, and a support structure attached to the filtering membrane configured to permanently engage a portion of an ostium and an interior wall of the left atrial appendage;
positioning the filtering membrane across the ostium by permanently engaging the portion of the interior wall of the left atrial appendage with the support structure; and
filtering blood flow through the ostium with the filtering membrane such that blood may flow through the filtering membrane while thrombus is substantially inhibited from passing therethrough, wherein the support structure comprises a plurality of retaining members, and wherein positioning the filtering membrane further comprises piercing the wall of the left atrial appendage with the retaining members. - View Dependent Claims (2, 3)
wherein positioning the filtering membrane further comprises centering the filtering membrane over the ostium by passing the centering structure into the ostium. -
3. The method as defined in claim 1, wherein the retaining members comprise an expandable structure, and
wherein the positioning the filtering membrane further comprises expanding the expandable structure to engage an interior wall of the left atrial appendage.
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4. A method of filtering the flow of blood between an atrium and a left atrial appendage of a patient comprising:
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providing a filtering membrane having a permeable structure which allows blood to flow through the filtering membrane but substantially inhibits thrombus from passing therethrough, and a support structure attached to the filtering membrane configured to permanently engage a portion of an ostium and an interior wall of the left atrial appendage;
positioning the filtering membrane across the ostium by permanently engaging the portion of the interior wall of the left atrial appendage with the support structure; and
filtering blood flow through the ostium with the filtering membrane such that blood may flow through the filtering membrane while thrombus is substantially inhibited from passing therethrough, wherein the support structure comprises a plurality of retaining members, and wherein positioning the filtering membrane further comprises atraumatically engaging the interior wall of the left atrial appendage with the retaining members.
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Specification