EXPANDABLE OCCLUSION DEVICES AND METHODS OF USE

摘要

An occlusion device and method for occluding an undesirable vascular structure, such as a septal defect or left atrial appendage. The occlusion device includes a lattice structure that expands from a contracted catheter-deliverable state to an expanded state that occludes the vascular structure. The lattice structure has one or more braided layers, with structural braided layers that provide structural support to the device, and occlusive layers that provide a lattice braiding or pore sizes that promote further occlusion by a biological process, such as tissue ingrowth that further occludes the affected vascular structure.

主权项

1. A device for occluding a vascular structure, wherein the vascular structure has a first end and a second end and wherein at least the first end is exposed to blood flow, the device comprising:
an expandable lattice structure having a proximal region configured to be positioned at or near the first end, a distal region configured to extend into an interior portion of the vascular structure, and a contact region therebetween, wherein the expandable lattice structure includes—
an occlusive braid configured to contact tissue of the vascular structure and obstruct blood flow therethrough; anda structural braid enveloped by the occlusive braid and coupled to the occlusive braid at a proximal hub located at the proximal region of the lattice structure; wherein the structural braid is configured to drive the occlusive braid radially outward to press the occlusive braid against the tissue of the vascular structure at and/or distal to the first end; and wherein at least one of the structural braid and the occlusive braid has an expanded memory-set region and a contracted memory-set region.