Blood clot filtering
DCFirst Claim
1. A filter sized and constructed to be compressed and passed through the vasculature of a patient to be anchored against an inner wall surface of a blood vessel for capturing blood clots in a blood stream passing therethrough, said filter comprisingan anchoring portion comprising a generally cylindrical self-expanding body formed from resilient material, said generally cylindrical body having proximal and distal ends and defining an axial direction and having a structure of variable size diameter expandable from a low-profile compressed condition to a larger profile expanded condition, wherein said resilient material urges said generally cylindrical body to radially expand and to thereby apply anchoring radial force against the inner wall surface of the blood vessel, anda generally conical filtering portion, axially aligned with said generally cylindrical body having an open proximal end coupled near the distal end of said anchoring portion and having an apical distal end.
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Abstract
A blood clot filter including an anchoring portion including a generally cylindrical self-expanding body formed from resilient material, the generally cylindrical body having proximal and distal ends and defining an axial direction and having a structure of variable size diameter expandable from a low-profile compressed condition to a larger profile expanded condition, wherein the resilient material urges the generally cylindrical body to radially expand and to thereby apply anchoring radial force against the inner wall surface of the blood vessel; and a generally conical filtering portion axially aligned with the generally cylindrical body having an open proximal end coupled to the distal end of the anchoring portion and having an apical distal end. Also disclosed is a blood clot filter having one or more hooks fixedly coupled to the anchoring portion and formed from compliant material having an original shape that bends under stress yet returns to its original shape when unstressed. The hooks respectively tend to project from the anchoring portion at an acute angle with respect to the axial direction for engagement with a vessel wall. Also, the hooks are deflectable toward the anchoring portion for achieving a low-profile.
802 Citations
32 Claims
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1. A filter sized and constructed to be compressed and passed through the vasculature of a patient to be anchored against an inner wall surface of a blood vessel for capturing blood clots in a blood stream passing therethrough, said filter comprising
an anchoring portion comprising a generally cylindrical self-expanding body formed from resilient material, said generally cylindrical body having proximal and distal ends and defining an axial direction and having a structure of variable size diameter expandable from a low-profile compressed condition to a larger profile expanded condition, wherein said resilient material urges said generally cylindrical body to radially expand and to thereby apply anchoring radial force against the inner wall surface of the blood vessel, and a generally conical filtering portion, axially aligned with said generally cylindrical body having an open proximal end coupled near the distal end of said anchoring portion and having an apical distal end.
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28. A filter sized and constructed to be compressed and passed through the vasculature of a patient for anchoring against an inner wall surface of a blood vessel for capturing blood clots in a blood stream passing therethrough, said filter comprising
cylindrical anchoring means having proximal and distal ends and defining an axial direction and having a structure of variable size diameter expandable from a low-profile compressed condition to a larger profile expanded condition, and conical filtering means axially aligned with said generally cylindrical body, the filtering means having an open proximal end coupled to the distal end of said anchoring portion and having an apical distal end, wherein said cylindrical anchoring means and said conical filtering means being substantially non-overlapping to achieve a low profile compressed condition for delivery of the filter through the vasculature.
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29. A filter sized and constructed to be compressed and passed through the vasculature of a patient to be anchored against an inner wall surface of a blood vessel for capturing blood clots in a blood stream passing therethrough, said filter comprising
an anchoring portion comprising a generally cylindrical body formed from resilient material having proximal and distal ends and having a generally circular transverse cross-section defining an axial direction, said anchoring portion further having a structure of variable size diameter expandable from a low-profile compressed condition to a larger profile expanded condition, wherein said resilient material urges said anchoring portion to radially expand and to thereby apply anchoring radial force against the inner wall surface of the blood vessel, a filtering portion axially aligned with said generally cylindrical body having an open proximal end coupled to the distal end of said anchoring portion, and one or more hooks fixedly coupled to said anchoring portion formed from compliant material having an original shape that bends under stress yet returns to its original shape when unstressed, said one or more hooks respectively tending to project from said anchoring portion at an acute angle with respect to the axial direction for engagement with a vessel wall, said one or more hooks further being deflectable toward said anchoring portion for achieving a low-profile.
Specification