Patent ID: 8100936

Claim:
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.