DEVICE AND METHOD FOR TREATING VASCULAR OCCLUSION
A system and method for managing an occlusion, such as a blood clot, within a lumen or passageway of a patient. More particularly, a system and method for rapidly restoring blood flow through an occlusion including a self-expanding, tubular member through which blood may flow when in an expanded state. The tubular member has a structure configured to engage the occlusive material, thereby allowing for extraction of at least a portion of the occlusive material. The system may further employ a material extraction member that is deployed distally of the tubular member.
1 . A material capture system, comprising:
a delivery instrument comprising a lumen;
a body comprising a braided mesh, the body comprising an open end comprising an opening and a closed end; and
an elongate member connected to the body
wherein the body is configured to be compressed in the delivery instrument in a first configuration,
wherein the body is transformable to a second configuration in which:
the open end is expanded and is proximal to the closed end,
the body forms a collection bag between the open end and the closed end, and
the open end is closer to the delivery instrument than the closed end,
wherein the body is configured to be retracted toward the delivery instrument to collect material in the collection bag while the open end is proximal to the closed end, and
wherein an expanded axial length of the body in the second configuration is adjustable by pushing or pulling the elongated member.
2 . The material capture system of claim 1 wherein the open end of the body has a ring-like shape in the second configuration.
3 . The material capture system of claim 2 wherein the open end of the body is expandable.
4 . The material capture system of claim 2 wherein the open end of the body is configured to be retracted into the delivery instrument before the closed end when the body is retracted toward the delivery instrument.
5 . The material capture system of claim 1 , further comprising an expandable funnel configured to receive the body.
6 . The material capture system of claim 5 wherein the expandable funnel is woven or braided.
7 . The material capture system of claim 5 wherein the expandable funnel is configured to be positioned between the body and the delivery instrument when the body and the funnel are expanded.
8 . The material capture system of claim 5 , further comprising a catheter defining a catheter lumen, wherein the body is configured to be retracted toward the expandable funnel to capture the material and to pass through the funnel into the catheter lumen.
9 . The material capture system of claim 5 wherein the body is configured to be expanded upstream of the material and the expandable funnel is configured to be expanded downstream of the material.
10 . The material capture system of claim 1 wherein a distal portion of the elongate member is positioned farther from the delivery instrument than the closed end of the body.
11 . The material capture system of claim 1 wherein the body is a generally tubular structure comprising a portion with a substantially constant diameter.
12 . The material capture system of claim 1 wherein the elongated body is connected to the open end of the body and is configured to move the body from the first configuration to the second configuration.
13 . The material capture system of claim 1 wherein, when the body is in the second configuration, the elongated member is manipulatable to affect an orientation of the opening of the body.
14 . The material capture system of claim 1 wherein the elongate member is fixed to the open end of the body.
15 . The material capture system of claim 1 wherein the braided mesh has a braid angle configured to change when the body is retracted toward the delivery element such that the body elongates when the body is retracted toward the delivery element to provide a longer surface for retraction through the material.
16 . The material capture system of claim 15 wherein the braid angle decreases when the body is retracted toward the delivery element.
17 . A material capture system, comprising:
a delivery instrument comprising a lumen;
a first portion comprising a braided mesh, the first portion comprising an opening and an end;
a second portion different from the first portion and coupled to a perimeter of the opening; and
an elongated member connected to the first portion or the second portion,
wherein the first portion and the second portion are configured to be compressed in the delivery instrument in a first configuration,
wherein the first portion and the second portion are transformable to a second configuration in which:
at least the opening and the second portion are expanded and the opening is proximal to the end,
the first portion forms a collection bag for the collection of material, and
the second portion is closer to the delivery instrument than the end of the first portion;
wherein the first portion and the second portion are configured to be retracted toward the delivery instrument to collect material in the collection bag while the opening is proximal to the end, and
wherein an axial distance between the opening and the end is adjustable by pushing or pulling the elongated member.
18 . The material capture system of claim 17 , further comprising an expandable funnel configured to receive the first portion and the second portion.
19 . The material capture system of claim 17 wherein a distal portion of the elongate member is positioned farther from the delivery instrument than the closed end of the body.
20 . The material capture system of claim 17 wherein the elongated body is configured to move the body from the first configuration to the second configuration.
21 . A material capture system, comprising:
a catheter defining a catheter lumen;
a funnel; and
a body comprising a braided mesh, the body comprising (a) an opened end comprising an opening and (b) a closed end,
wherein the body and the funnel are compressed in a first configuration,
wherein the body and the funnel are transformable to a second configuration in which the funnel is expanded and the opened end comprising the opening is expanded and the closed end forms a curved collection bag for the collection of material, wherein the opened end is closer to the funnel than the closed end when the body and the funnel are transformed to the second configuration,
wherein the body is configured to be retracted toward the funnel to collect material, and wherein the body is configured to be passed through the funnel and into the catheter.
22 . The material capture system of claim 21 wherein the body is a generally tubular structure comprising a portion with a substantially constant diameter.
23 . The material capture system of claim 21 wherein the funnel is woven or braided.
24 . The material capture system of claim 21 , further comprising an elongate member coupled to the body, wherein the elongate member is manipulatable to affect an orientation of the opening of the body when the body is in the second configuration.
25 . The material capture system of claim 24 wherein the elongate member is fixed to the open end of the body.
26 . The material capture system of claim 21 wherein the braided mesh has a braid angle configured to change when the body is retracted toward the funnel such that the body elongates when the body is retracted toward the funnel to provide a longer surface for retraction through the material.
27 . The material capture system of claim 26 wherein the braid angle decreases when the body is retracted toward the funnel.