Vein filter
First Claim
1. A vessel filter comprising first and second end portions, a first proximal region at the first end portion and a second region at the second end portion, the first region including a filtering section for capturing particles and having a first transverse dimension at a first terminal end of the filter, the second region including a mounting section a second terminal distal end of the filter for mounting the filter within a vessel, the mounting section having a second transverse dimension at the second terminal end of the filter, the second dimension being greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a cut tubular retrieval region, the retrieval region having only one hook having a cutout exposing an internal annular surface, the hook having a single ear and having a gap configured to receive a retrieval snare of a retrieval device, the annular surface extending proximal of the gap and dimensioned to receive therein a curved outer wall of a retrieval sheath of the retrieval device.
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Accused Products
Abstract
A vessel filter 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 having a converging region at a first end portion to direct particles toward the center of the filter and the second region is flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the first end portion. The second region includes a vessel engaging portion at the second end portion. The second region includes a plurality of spaced apart struts with adjacent struts being joined.
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Citations
18 Claims
- 1. A vessel filter comprising first and second end portions, a first proximal region at the first end portion and a second region at the second end portion, the first region including a filtering section for capturing particles and having a first transverse dimension at a first terminal end of the filter, the second region including a mounting section a second terminal distal end of the filter for mounting the filter within a vessel, the mounting section having a second transverse dimension at the second terminal end of the filter, the second dimension being greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a cut tubular retrieval region, the retrieval region having only one hook having a cutout exposing an internal annular surface, the hook having a single ear and having a gap configured to receive a retrieval snare of a retrieval device, the annular surface extending proximal of the gap and dimensioned to receive therein a curved outer wall of a retrieval sheath of the retrieval device.
- 11. A vessel filter comprising a first distal region and a second region, the first region including a filtering section for capturing particles and having a first transverse dimension, the second region including a mounting section for mounting the filter within a vessel, the mounting section having a second transverse dimension greater than the first transverse dimension and including vessel engaging structure to retain the filter, the first region further including a cut tubular retrieval region having a longitudinal axis, the retrieval region including only one hook, the hook positioned on only one side of the longitudinal axis at a proximal end thereof and a curved wall spaced axially distally from the hook to provide a caroming surface to facilitate entry into a retrieval sheath, the hook having an inner surface exposed and dimensioned to receive a portion of a retrieval device.
Specification