DEVICES FOR THERAPEUTIC VASCULAR PROCEDURES
Methods and devices for removing a thrombus are described. The device includes an expandable cylindrical structure made of wires and a self-expanding permeable shell located at the distal end of the cylindrical structure. Methods and devices for treating a cerebral aneurysm are described. The device may include a self-expanding resilient permeable shell and a metallic coil secured to the distal end of the permeable shell.
1 . A device for treatment of an aneurysm within a patient's vasculature, comprising:
a self-expanding resilient permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the plurality of filaments are secured at least at one of the proximal end or the distal end thereof;
a metallic coil formed from a wire having a first diameter, wherein the metallic coil is secured at the distal end of the self-expanding resilient permeable shell;
wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with a globular, axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments; and
wherein the metallic coil has a linear, straightened shape configured for delivery within a microcatheter.
2 . The device of claim 1 , wherein the metallic coil is configured to place a bias on the permeable shell when the permeable shell is in the expanded state within an aneurysm.
3 . The device of claim 1 , wherein the metallic coil when at least partially compressed in an axial direction applies an axial bias of at least 0.27 grams
4 . The device of claim 1 , wherein the metallic coil when at least partially compressed in an axial direction applies an axial bias of at least 2.67 grams.
5 . The device of claim 1 , wherein the metallic coil when at least partially compressed in an axial direction applies an axial bias, of at least 16.6 grams.
6 . The device of claim 1 , wherein the metallic coil is configured to conform to a three-dimensional framing shape.
7 . The device of claim 1 , wherein the metallic coil is formed from wire comprising platinum.
8 . The device of claim 1 , wherein the metallic coil has an expanded state having at least one loop having a secondary diameter.
9 . A method for treating a cerebral aneurysm, comprising the steps of:
providing an implant structure comprising;
a sell expanding resilient permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the plurality of filaments are secured at least at one of the proximal end or the distal end thereof;
a metallic coil formed from a wire having a first diameter, wherein the metallic coil is secured at the distal end of the self-expanding resilient permeable shell;
wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with a globular, axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments; and
wherein the metallic coil has a linear, straightened shape configured for delivery within a microcatheter;
advancing the implant within a microcatheter to a region near the cerebral aneurysm;
deploying the implant within the cerebral aneurysm, the metallic coil positioned near a dome of the cerebral aneurysm and assuming the expanded state and the permeable shell assuming the expanded deployed state within the cerebral aneurysm; and
withdrawing the microcatheter from the region near the cerebral aneurysm after deploying the implant.
10 . The method of claim 9 , wherein the metallic coil pushes the permeable shell against an opening of the cerebral aneurysm.
11 . The method of claim 9 , wherein the metallic coil tracks around a diameter of the cerebral aneurysm.
12 . The method of claim 9 , wherein the secondary diameter of the metallic coil is approximately equal to a diameter of the permeable shell.
13 . The method of claim 9 , wherein the metallic coil, when at least partially compressed in an axial direction, applies an axial bias of at least 0.27 grams.
14 . The method of claim 9 , wherein the metallic coil, when at least partially compressed in an axial direction applies an axial bias of at least 2.67 grams.
15 . The method of claim 9 , wherein the metallic coil, when at least partially compressed in an axial direction, applies an axial bias of at least 16.6 grams.
16 . The method of claim 9 , wherein the metallic coil has an expanded state having at least one loop having a secondary diameter.