Vein filter
First Claim
1. A vessel filter comprising a first distal region terminating at a first end and a second proximal region terminating at a second end of the filter, the filter movable between a collapsed position for delivery to a vessel and an expanded position for placement within the vessel, the first distal region having a filter portion having a converging region to direct particles toward a center of the filter, the second proximal region being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second proximal region including a vessel engaging portion at the second end portion, the first distal region having a tubular portion and having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends axially in an elongated position distal of the retrieval hook and in the expanded position forms a looped region extending radially from the first distal region and looping around the tubular portion, wherein the looped region is an open loop.
15 Assignments
0 Petitions
Accused Products
Abstract
A vessel filter comprising a first distal region terminating at a first end and a second proximal region terminating at a second end of the filter and movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel. The first region has a filter portion having a converging region to direct particles toward the center of the filter. The second region is flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion and includes a vessel engaging portion at the second end portion. The first region has a retrieval hook and a spacer forming a looped region extending radially from the first region.
213 Citations
18 Claims
- 1. A vessel filter comprising a first distal region terminating at a first end and a second proximal region terminating at a second end of the filter, the filter movable between a collapsed position for delivery to a vessel and an expanded position for placement within the vessel, the first distal region having a filter portion having a converging region to direct particles toward a center of the filter, the second proximal region being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second proximal region including a vessel engaging portion at the second end portion, the first distal region having a tubular portion and having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends axially in an elongated position distal of the retrieval hook and in the expanded position forms a looped region extending radially from the first distal region and looping around the tubular portion, wherein the looped region is an open loop.
- 12. A vessel filter comprising a body made from a single tube and movable between a collapsed position and an expanded position, the body having a longitudinal axis and cut to create a plurality of elongated struts, the body further including a tubular region proximal of the struts and having a cut therein to form a radial spacer, the radial spacer extending substantially parallel to the longitudinal axis of the body and distally beyond the tubular region in the collapsed position and extending radially outwardly in a loop from the tubular region in the expanded position to space a retrieval region of the filter from a vessel wall, the loop extending around the tubular region, wherein the loop is an open loop.
- 16. A vessel filter comprising a body made from a single tube and movable between a collapsed position and an expanded position, the body having a longitudinal axis and cut to create a plurality of elongated struts, the body further including a tubular region proximal of the struts and having a cut therein to form a radial spacer, the radial spacer extending substantially parallel to the longitudinal axis of the body and distally beyond the tubular region in the collapsed position and extending radially outwardly in a loop from the tubular region in the expanded position to space a retrieval region of the filter from a vessel wall, the loop extending around the tubular region, wherein the loop extends for greater than 360 degrees around the tubular portion.
Specification