| 摘要 |
A vessel filter (10) comprising a first region and a second region wherein the filter is movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel. A first region has a filter portion (19) having a converging region (21) to direct particles toward the center of the filter and having a plurality of spaced apart elongated struts (14) and, a plurality of connecting struts (14a, 14b) extending at an angle from the elongated struts to form closed geometric shapes (25). The second region is a flared region (17) in the expanded position to have a transverse dimension increasing toward a second end portion opposite the first end portion. The second region includes vessel engaging hooks (72a, 72b) at the second end portion. The filter has a plurality of closed looped spacer struts (40) extending radially with respect to a longitudinal axis of the filter when the filter is in the expanded position, positioned distally of the filter portion.
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