Vein filter
First Claim
1. A vessel filter comprising a first region and a second region, the filter movable between a collapsed position for delivery to a vessel and an expanded position for placement within the vessel, the first region having a filter portion having a converging region to direct particles toward a center of the filter, the filter portion converging into a tubular portion, the tubular portion having an internal surface, the filter terminating at a cranial end, the second region being flared in the expanded position to have a transverse dimension increasing in a direction away from the filter portion toward a caudal end, the second region including a vessel engaging portion, the first region having a spacer to keep the filter more toward a center of the vessel upon placement of the filter within the vessel, the spacer having a first end and a second end, the second end fixedly attached to the internal surface of the tubular portion, the first end extending within the tubular portion and emerging cranially from the tubular portion, wherein in the collapsed position of the filter the first end extends axially in an elongated position cranially of a cranial end of the tubular portion and in the expanded position of the filter the first end extends radially and helically with respect to a longitudinal axis of the filter and transitions to a substantially planar looped region.
16 Assignments
0 Petitions
Accused Products
Abstract
A vessel filter movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel, and having a filter portion having a converging region to direct particles toward the center. The filter portion converges into a tubular portion. The second region is flared in the expanded position to have a transverse dimension increasing in a direction away from the filter portion and includes a vessel engaging portion. The first region has a spacer to keep the filter more toward a center of a vessel, wherein in the collapsed position the spacer extends axially in an elongated position cranially of the cranial end of the filter and in the expanded position the spacer forms a looped region extending radially with respect to a longitudinal axis of the filter. The spacer has a first end attached to the internal surface of the tubular portion and extends within the tubular portion and emerges cranially from the tubular region to form the looped region.
220 Citations
11 Claims
- 1. A vessel filter comprising a first region and a second region, the filter movable between a collapsed position for delivery to a vessel and an expanded position for placement within the vessel, the first region having a filter portion having a converging region to direct particles toward a center of the filter, the filter portion converging into a tubular portion, the tubular portion having an internal surface, the filter terminating at a cranial end, the second region being flared in the expanded position to have a transverse dimension increasing in a direction away from the filter portion toward a caudal end, the second region including a vessel engaging portion, the first region having a spacer to keep the filter more toward a center of the vessel upon placement of the filter within the vessel, the spacer having a first end and a second end, the second end fixedly attached to the internal surface of the tubular portion, the first end extending within the tubular portion and emerging cranially from the tubular portion, wherein in the collapsed position of the filter the first end extends axially in an elongated position cranially of a cranial end of the tubular portion and in the expanded position of the filter the first end extends radially and helically with respect to a longitudinal axis of the filter and transitions to a substantially planar looped region.
Specification