Non-entangling vena cava filter
First Claim
1. An implantable vessel filter comprising:
- an elongated body having a proximal end and a distal end, the proximal end coupled to a hub; and
a plurality of elongated appendages having a proximal end coupled to the hub and configured to extend radially outward from the elongated body in a filter expanded configuration, the appendages configured to collapse against the elongated body in a filter compressed configuration, some or all of the appendages including a vessel engaging hook on a distal end thereof, the elongated body including a grooved distal section configured to receive the distal ends of the appendages in the filter compressed configuration.
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Accused Products
Abstract
An implantable vessel filter device having a plurality of radially expandable legs with hooks, and a center-post configured to prevent entanglement of the radially expandable legs when they are compressed against the center-post. In one variation, the filter device includes a first set of legs, forming a first filter basket in the expanded position, and a second set of legs, forming a second filter basket distal to the first filter in the expanded position. Hooks may be provided on the second set of legs to prevent migration of the filter along the vessel after the filter is deployed. Grooves may be provided along the shaft of the center-post to receive the hooks and prevent the hooks from interlocking when the legs of the filter are compressed along the center-post.
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Citations
23 Claims
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1. An implantable vessel filter comprising:
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an elongated body having a proximal end and a distal end, the proximal end coupled to a hub; and a plurality of elongated appendages having a proximal end coupled to the hub and configured to extend radially outward from the elongated body in a filter expanded configuration, the appendages configured to collapse against the elongated body in a filter compressed configuration, some or all of the appendages including a vessel engaging hook on a distal end thereof, the elongated body including a grooved distal section configured to receive the distal ends of the appendages in the filter compressed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a removable blood clot filter having a plurality of appendages coupled at a proximal end thereof to a hub and including vessel engaging hooks at a distal end thereof, the improvement comprising:
a center-post coupled proximally to the hub and including a grooved distal section configured to receive said distal ends of the appendages in a compressed position. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
Specification