Vein filter
First Claim
1. A vessel filter comprising a first cranial region terminating at a first end and a second caudal 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 cranial region having a filter portion having a converging region to direct particles toward a center of the filter, the converging region converging into a tubular portion, the second caudal region forming a mounting region and being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second caudal region including a vessel engaging portion at the second end portion, the first region having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends from the tubular portion in a cranial direction cranially beyond the retrieval hook and along an axis substantially parallel to a longitudinal axis of the filter in the collapsed position of the filter, the spacer being a single elongated strut and in the expanded position forms a loop extending radially from the tubular portion, wherein the spacer in the expanded position has a maximum transverse dimension less than a maximum transverse dimension of the filter in the expanded position.
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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.
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Citations
16 Claims
- 1. A vessel filter comprising a first cranial region terminating at a first end and a second caudal 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 cranial region having a filter portion having a converging region to direct particles toward a center of the filter, the converging region converging into a tubular portion, the second caudal region forming a mounting region and being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second caudal region including a vessel engaging portion at the second end portion, the first region having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends from the tubular portion in a cranial direction cranially beyond the retrieval hook and along an axis substantially parallel to a longitudinal axis of the filter in the collapsed position of the filter, the spacer being a single elongated strut and in the expanded position forms a loop extending radially from the tubular portion, wherein the spacer in the expanded position has a maximum transverse dimension less than a maximum transverse dimension of the filter in the expanded position.
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12. A vessel filter comprising a first cranial region terminating at a first end and a second caudal 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 cranial region having a filter portion having a converging region to direct particles toward a center of the filter, the converging region converging into a tubular portion, the second caudal region forming a mounting region and being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second caudal region including a vessel engaging portion at the second end portion, the first region having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends from the tubular portion in a cranial direction cranially beyond the retrieval hook and along an axis substantially parallel to a longitudinal axis of the filter in the collapsed position of the filter, the spacer being a single elongated strut and in the expanded position forms a loop extending radially from the tubular portion, wherein the spacer encircles the tubular portion.
- 13. A vessel filter comprising a first cranial region terminating at a first end and a second caudal 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 cranial region having a filter portion having a converging region to direct particles toward a center of the filter, the converging region converging into a tubular portion, the second caudal region forming a mounting region and being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second caudal region including a vessel engaging portion at the second end portion, the first region having a retrieval hook and a spacer, wherein in the collapsed position the spacer extends from the tubular portion in a cranial direction cranially beyond the retrieval hook and along an axis substantially parallel to a longitudinal axis of the filter in the collapsed position of the filter, the spacer being a single elongated strut and in the expanded position forms a loop extending radially from the tubular portion, wherein in the expanded position the loop is substantially perpendicular to the longitudinal axis of the filter so that the longitudinal axis passes through an opening in the loop.
Specification