Non-entangling vena cava filter
First Claim
1. An implantable vessel filter comprising:
- an elongated body having a proximal end and a distal end;
a plurality of elongated appendages configured to extend radially from a proximal portion of said elongated body in a distal direction and away from said elongated body, the distal ends of at least some of said plurality of elongated appendages being configured with hooks such that when said appendages are expanded in a body vessel, the distal end of said appendages engages an inner wall of the vessel, wherein said plurality of elongated appendages is collapsible toward said elongated body, and a distal section of said longitudinal body is configured to prevent said elongated appendages from entangling with each other when collapsed.
2 Assignments
0 Petitions
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 comprises 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
31 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;
a plurality of elongated appendages configured to extend radially from a proximal portion of said elongated body in a distal direction and away from said elongated body, the distal ends of at least some of said plurality of elongated appendages being configured with hooks such that when said appendages are expanded in a body vessel, the distal end of said appendages engages an inner wall of the vessel, wherein said plurality of elongated appendages is collapsible toward said elongated body, and a distal section of said longitudinal body is configured to prevent said elongated appendages from entangling with each other when collapsed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In a removable blood clot filter having a plurality of appendages with hooks for engaging an inner wall of a blood vessel, the improvement comprising:
a center-post configured to prevent said appendages from entangling with each other when said plurality of appendages are compressed toward a longitudinal axis of said filter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of utilizing an implantable vessel filter having a plurality of legs with a hook at the distal end of each of said legs, comprising the step of:
compressing said plurality of legs toward a center-post and placing each of said hooks within a corresponding groove on said center-post. - View Dependent Claims (30, 31)
Specification