DEVICES FOR INHIBITING DISTAL DRIFT OF FLOW DIVERTING STENTS
Vascular treatment devices and methods include a woven structure including a plurality of bulbs that may be self-expanding, a hypotube, for example including interspersed patterns of longitudinally spaced rows of kerfs, and a bonding zone between the woven structure and the hypotube. The woven structure may include patterns of radiopaque filaments measureable under x-ray. Structures may be heat treated to include various shapes at different temperatures. The woven structure may be deployable to implant in a vessel. A catheter may include a hypotube including interspersed patterns of longitudinally spaced rows of kerfs and optionally a balloon. Laser cutting systems may include fluid flow systems.
1 . A flow diverting device for inhibiting flow of blood into an aneurysm and permitting perfusion to branch vessels while inhibiting distal drift, the device comprising:
a plurality of wires woven to form a textile structure, the plurality of wires consisting of 36 shape memory wires and 12 radiopaque wires,
the textile structure having a porosity between 60% and 78%,
the textile structure expandable between a radially compressed state and a radially expanded state,
the textile structure in the radially expanded state comprising:
a first bulb configured to be placed across a neck of an aneurysm configured to inhibit distal drift,
a second bulb proximal to the first bulb,
a third bulb distal to the first bulb,
a first neck extending between the first bulb and the second bulb,
a second neck extending between the first bulb and the third bulb,
a lateral neck extending from the first bulb, and
a medial neck extending from the first bulb.
2 . The device of claim 1 , wherein the shape memory wires comprise chromium cobalt wires.
3 . The device of claim 1 , wherein the radiopaque wires comprise platinum tungsten wires.
4 . A flow diverting device for inhibiting flow of blood into an aneurysm and permitting perfusion to branch vessels while inhibiting distal drift, the device comprising:
a plurality of wires woven to form a textile structure, the plurality of wires comprising 75% shape memory wires and 25% radiopaque wires,
the textile structure having a porosity configured to inhibit flow of blood into an aneurysm and permitting perfusion to branch vessels,
the textile structure expandable between a radially compressed state and a radially expanded state,
the textile structure in the radially expanded state comprising:
a first bulb configured to be placed across a neck of an aneurysm,
a second bulb configured to be placed in cylindrical vasculature, and
a first neck longitudinally between the first bulb and the second bulb,
at least the first bulb configured to inhibit distal drift.
5 . The device of claim 4 , wherein the shape memory wires comprise chromium cobalt wires.
6 . The device of claim 4 , wherein the radiopaque wires comprise platinum tungsten wires.
7 . The device of claim 4 , wherein the textile structure has a porosity between 60% and 78%.
8 . The device of claim 4 , wherein the second bulb is configured to inhibit distal drift.
9 . The device of claim 4 , wherein the textile structure in the radially expanded state further comprises:
a third bulb, and
a second neck longitudinally between the first bulb and the third bulb or longitudinally between the second bulb and the third bulb.
10 . The device of claim 4 , wherein the plurality of wires comprises 48 wires, wherein the textile structure has a porosity between 60% and 78%, and wherein the textile structure in the radially expanded state further comprises:
a third bulb, and
a second neck longitudinally between the first bulb and the third bulb or longitudinally between the second bulb and the third bulb, and wherein each of the first bulb, the second bulb, and the third bulb is configured to inhibit distal drift.
11 . A flow diverting device for inhibiting flow of blood into an aneurysm and permitting perfusion to branch vessels while inhibiting distal drift, the device comprising:
a plurality of wires woven to form a textile structure,
the textile structure having a porosity configured to inhibit flow of blood into an aneurysm and permitting perfusion to branch vessels,
the textile structure expandable between a radially compressed state and a radially expanded state,
the textile structure in the radially expanded state comprising a first bulb configured to be placed across a neck of an aneurysm, the first bulb configured to inhibit distal drift.
12 . The device of claim 11 , wherein the plurality of wires comprises shape memory wires and radiopaque wires.
13 . The device of claim 12 , wherein the shape memory wires comprise chromium cobalt wires.
14 . The device of claim 12 , wherein the radiopaque wires comprise platinum tungsten wires.
15 . The device of claim 11 , wherein the plurality of wires comprises 75% shape memory wires and 25% radiopaque wires.
16 . The device of claim 11 , wherein the textile structure has a porosity between 60% and 78%.
17 . The device of claim 11 , wherein the textile structure comprises pores having a dimension between 0.02 mm2 and 0.05 mm2.
18 . The device of claim 11 , wherein the textile structure in the radially expanded state further comprises:
a second bulb, and
a first neck longitudinally between the first bulb and the second bulb.
19 . The device of claim 18 , wherein the textile structure in the radially expanded state further comprises:
a third bulb, and
a second neck longitudinally between the first bulb and the third bulb or longitudinally between the second bulb and the third bulb.
20 . The device of claim 11 , wherein the plurality of wires comprises 48 wires, wherein the plurality of wires comprises 75% shape memory wires and 25% radiopaque wires, wherein the textile structure has a porosity between 60% and 78%, and wherein the textile structure in the radially expanded state further comprises:
a second bulb,
a first neck longitudinally between the first bulb and the second bulb,
a third bulb, and
a second neck longitudinally between the first bulb and the third bulb or longitudinally between the second bulb and the third bulb, and wherein each of the first bulb, the second bulb, and the third bulb is configured to inhibit distal drift.