EMBOLUS BLOOD CLOT FILTER WITH POST DELIVERY ACTUATION
First Claim
1. A filter to be placed in a flow of blood through a blood vessel, the filter comprising:
- two or more members positioned by a resorbable restraint coupled to spring portions of the two or more members so as to retain the members in a first configuration that provides a first spring force at a distal end of each member; and
wherein when the resorbable restraint has resorbed the members assume a second configuration that provides a second spring force at a distal end of each member, wherein the second spring force is lower than the first spring force.
2 Assignments
0 Petitions
Accused Products
Abstract
A removable blood clot filter includes a number of locator members and anchor members, and a bio-resorbable structure that causes locator members and/or anchor members to deploy to an initial configuration which changes when the bio-resorbable structure is resorbed. The bio-resorbable structure causes the filter locator members and/or anchor members to press against the vessel wall sufficient to locate and anchor the filter upo delivery. After the bio-resorbable structure is resorbed, the locator member'"'"'s and/or anchor members change shape to apply less pressure against the vessel wall. The bio-resorbable structure may be activated by exposure to radiation so that actuation of the locator members and/or anchor members can be enabled or initiated by a clinician.
-
Citations
30 Claims
-
1. A filter to be placed in a flow of blood through a blood vessel, the filter comprising:
-
two or more members positioned by a resorbable restraint coupled to spring portions of the two or more members so as to retain the members in a first configuration that provides a first spring force at a distal end of each member; and wherein when the resorbable restraint has resorbed the members assume a second configuration that provides a second spring force at a distal end of each member, wherein the second spring force is lower than the first spring force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A filter to be placed in a blood vessel, the filter comprising:
-
a hub disposed along a longitudinal axis; a plurality of anchor members coupled to the hub, each anchor member including a hook and configured so that the hook penetrates a wall of the blood vessel when the filter is disposed in the blood vessel; a plurality of locator members coupled to the hub, each locator member including; a first portion proximate the hub, the first portion including a spring portion; a second portion that extends from the first portion along a first axis; a third portion that extends from the second portion along a second axis, wherein the second axis is distinct from the first axis; and a tip portion that extends from the third portion along a tip axis, wherein the tip axis is distinct from the first and second axes; and a resorbable restraint coupled to the spring portions so as to retain the locator members in a first configuration that provides a first spring force at a distal end of each locator member, and wherein when the resorbable restraint has resorbed each locator member assumes a second configuration that provides a second spring force at a distal end of each member, wherein the second spring force is lower than the first spring force. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A filter to be placed in a blood vessel, comprising:
-
a hub disposed along a longitudinal axis; a plurality of anchor members coupled to the hub, each anchor member comprising a hook, an extended rigid portion coupled at a first end to the hook, and a flexible portion coupled to the hub; a sleeve surrounding the flexible portion of the plurality of anchor members, the sleeve comprising a bio-resorbable material configured to restrain the plurality of anchor members; and a plurality of locator members coupled to the hub, each locator member including a tip portion, wherein each locator member is configured so that the tip portion engages the wall of the blood vessel when the filter is disposed in the blood vessel, wherein each of the plurality of anchor members is configured so that (i) when the filter is disposed in the blood vessel and the sleeve surrounds the flexible portion of the plurality of anchor members the members assume a first configuration which applies a first radial spring force at the hook end, and (ii) when the sleeve has resorbed, the anchor members assume a second configuration in which a second radial spring force is applied at the hook end, wherein the second radial spring force is less than the first radial spring force. - View Dependent Claims (24, 25)
-
-
26. A filter to be placed in a blood vessel, comprising:
-
a plurality of filter members; and means for delaying actuation of a filter member following delivery of the filter into the blood vessel.
-
-
27. A method of implanting a blood filter into a blood vessel, comprising:
-
maintaining filter members in a first configuration after implantation in a blood vessel; and moving filter members to second configuration after an extended exposure to blood. - View Dependent Claims (28, 29)
-
-
30. A filter to be placed in a blood vessel, the filter comprising:
-
a plurality of elongate members coupled at one end and diverging from each other at another end; a bio-resorbable material covering at least a portion of the one end; and a non-resorbable annulus surrounding the elongate members proximate the one end and contiguous to the bioresorbable material so that upon resorption of the bioresorbable material, the sleeve is operable to slide towards the one end.
-
Specification