Occlusion of a vessel
A device for occluding a vessel employs one of a number of different expansion members joined to one or more elongate members. The expansion member may include a braid, one or more coils, ribs, a ribbon-like structure, a slotted tube, or a filter-like mesh. If the expansion member is enclosed by a suitable membrane, the device seals with the vessel wall to partially or completely occlude the vessel. A perforated membrane may be used to permit the perfusion of blood. The expansion member may be self-expanding, or it may be expanded by engaging it with one of the elongate members. Alternatively, the expansion member may be expanded by heating it.
1. A device for occluding a vascular segment, comprising:
a tubular member having a proximal end portion and a distal end portion and a lumen extending therethrough;
an expandable member at the distal end portion of the tubular member, the expandable member being formed at least in part from a braided structure;
an elongate member having a proximal end portion and a distal end portion, wherein the distal end portion is connected to the expandable member, and the elongate member extends longitudinally within the lumen of the tubular member, the elongate member being longitudinally moveable between a first position wherein the expandable member is in a collapsed configuration, and a second position wherein the expandable member is in an expanded configuration, and wherein the elongate member moves proximally longitudinally with respect to the tubular member as the expandable member moves from its collapsed configuration to its expanded configuration; and
an occluding membrane encapsulating the expandable member, the occluding membrane being configured to completely occlude blood flow in the vascular segment.
2. The device of claim 1 , further comprising a lock configured to lock the expandable member in its expanded configuration.
3. The device of claim 2 , wherein the elongate member rotates to position the expandable member in its locked, expanded configuration.
4. The device of claim 3 , wherein rotation of the elongate member causes a portion connected to the elongate member to engage a portion connected to the tubular member.
5. The device of claim 2 , wherein the elongate member rotates approximately 90 degrees to position the expandable member in its locked, expanded configuration.
6. The device of claim 1 , wherein the expandable member has a proximal end connected to the tubular member and a distal end connected to the elongate member.
7. The device of claim 1 , wherein said occluding membrane is configured for creating a seal with the vascular segment.
8. The device of claim 1 , wherein said expandable member comprises a member selected from the group consisting of a braid, a coil, a ribbon-like structure, a slotted tube, a plurality of ribs and a filter-like mesh.
9. The device of claim 1 , wherein said expandable member expands as said elongate member is retracted.
10. The device of claim 1 , wherein said expandable member occludes the blood vessel and inhibits fluid flow therethrough when said expandable member contacts the vascular segment.
11. The device of claim 1 , wherein said expandable member has holes therein.
12. A device for occluding a vascular segment, comprising:
a tubular member having a proximal end portion and a distal end portion and a lumen extending therethrough;
an expandable member at the distal end portion of the tubular member;
an elongate member having a proximal end portion and a distal end portion, wherein the distal end portion is connected to the expandable member, and the elongate member extends longitudinally within the lumen of the tubular member, the elongate member being longitudinally moveable relative to the tubular member between a first position wherein the expandable member is in a collapsed configuration, and a second position wherein the expandable member is in an expanded configuration, wherein the elongate member is pulled proximally from the first position to the second position with respect to the tubular member to expand the expandable member; and
a covering disposed over the expandable member configured to expand with the expandable member and further configured to interrupt fluid flow through a vascular segment when the expandable member is in the expanded configuration.
13. The device of claim 12 , wherein the covering is configured to create a seal with the vascular segment when the expandable member is in the expanded configuration.
14. The device of claim 13 , wherein said material does not completely encapsulate said expandable member.
15. The device of claim 12 , wherein the elongate member has a diameter of about 0.006 to 0.008 inches.
16. The device of claim 12 , wherein said expandable member comprises a member selected from the group consisting of a braid, a coil, a ribbon-like structure, a slotted tube, a plurality of ribs and a filter-like mesh.
17. The device of claim 12 , wherein said expandable member expands as said elongate member is retracted.
18. The device of claim 12 , wherein said expandable member occludes the blood vessel when said expandable member contacts the vascular segment.
19. The device of claim 12 , wherein said covering has holes therein.
20. The device of claim 12 , wherein the expandable member has a proximal end connected to the tubular member and a distal end connected to the elongate member.