摘要：

For being permanently placed across the patient of ostium of left atrial appendage, including filter membrane is configured to extend across a mouthful left auricle of heart. The filter membrane has permeable structure, it allow blood flow through, but substantially anti-tampon with pass through. The device also includes that support construction is attached to filter membrane and is held in place, the filter membrane across left atrial mouth and for good and all engaged the inner wall of a part of left auricle of heart. The support construction can be radially expandable from the first construction and the second construction, the inner wall of this construction engagement mouth or left auricle of heart. Filter membrane can limit an opening, be configured to expand which inhibits thrombus channel to flow through to the second size, in this way permission intervention device from first size, for example, expanded balloon, passes through, and wherein the opening towards first size.

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