Apparatus and methods for sealing a puncture in tissue
An occlusion device for sealing a puncture through tissue includes a tubular wire member having a proximal end, a distal end sized for insertion into the puncture, a lumen extending between the proximal and distal ends, a port adjacent the proximal end communicating with the lumen, and a balloon on the distal end. A source of fluid is connectable to the wire member for delivering fluid via the port into the lumen for expanding the balloon. A piston is movable axially within the wire member to allow fluid to be delivered into the lumen, to isolate the lumen, and to deliver fluid within the lumen into the balloon to expand the balloon.
1. An occlusion device for sealing a puncture through tissue, comprising:
an elongate tubular member comprising a proximal end, a distal end sized for insertion into a puncture, a lumen extending at least partially between the proximal and distal ends, and an expandable occlusion element carried on a distal region of the tubular member, the occlusion element having an interior communicating with a distal opening in the lumen, the tubular member having a uniform outside diameter extending between the proximal end and the distal region and including the proximal end; and
an elongate piston member movable within the lumen of the tubular member for delivering fluid into, and drawing fluid out of, the interior of the occlusion element to thereby expand and collapse the occlusion element, the piston member having a proximal end extending from a proximal opening of the tubular member lumen.
2. The device of claim 1 , the tubular member further comprising a port in a proximal region of the tubular member communicating with the lumen.
3. The device of claim 2 , further comprising a fluid loading device connectable around the proximal region of the tubular member, such that the fluid loading device communicates with the port for delivering fluid from the fluid loading device into the lumen of the tubular member.
4. The device of claim 1 , wherein the tubular member has an outer diameter of not more than about 0.040 inch.
5. The device of claim 1 , wherein the tubular member comprises one or more wire coils defining a substantially nonporous wall of the tubular member.
6. The device of claim 1 , wherein the tubular member comprises a solid-walled tubular body defining the lumen.
7. The device of claim 1 , wherein at least one of the tubular member and the piston member comprises a locking mechanism for preventing distal movement of the piston member relative to the tubular member beyond a predetermined position.
8. The device of claim 7 , wherein the locking mechanism comprises a ratchet mechanism that allows the piston member to be advanced distally relative to the tubular member to the predetermined position, but prevents the piston member from being directed proximally relative to the tubular member from the predetermined position.
9. The device of claim 7 , wherein the locking mechanism comprises a tapered distal region on the tubular member and a correspondingly tapered shoulder on the distal end of the piston member.
10. The device of claim 1 , wherein the piston member has a substantially uniform cross-section.
11. An occlusion device for sealing a puncture through tissue, comprising:
an elongate tubular member comprising a proximal end, a distal end sized for insertion into a puncture, a lumen extending at least partially between the proximal and distal ends, a port in a proximal region of the tubular member communicating with the lumen, and an expandable occlusion element carried on a distal region of the tubular member, the occlusion element having an interior communicating with a distal opening in the lumen; and
a fluid loading device comprising a barrel connectable around the proximal region of the tubular member, such that the barrel surrounds all sides of the tubular member and the fluid loading device communicates with the port for delivering fluid from the fluid loading device into the lumen of the tubular member.
12. The device of claim 11 , further comprising an elongate piston member movable within the lumen of the tubular member for delivering fluid into and drawing fluid out of the interior of the occlusion element to thereby expand and collapse the occlusion element, respectively, the piston member having a proximal end extending from a proximal opening of the tubular member lumen.
13. The device of claim 12 , wherein at least one of the tubular member and the piston member comprises a locking mechanism for preventing distal movement of the piston member relative to the tubular member beyond a predetermined position.
14. The device of claim 12 , wherein the piston member has a substantially uniform cross-section.
15. The device of claim 11 , wherein the tubular member has an outer diameter of not more than about 0.040 inch.
16. The occlusion device of claim 11 , further comprising a syringe coupled to the fluid loading device to deliver fluid into the lumen to allow expansion and collapse of the occlusion element.
17. The device of claim 16 , further comprising an actuator on the proximal end movable between a proximal position and a distal position to deliver fluid into and draw fluid out of the interior of the occlusion element to thereby expand and collapse the occlusion element.
18. The device of claim 17 , wherein the actuator comprises an elongate piston member movable within the lumen of the tubular member for delivering fluid into and drawing fluid out of the interior of the occlusion element.
19. The device of claim 16 , wherein the tubular member has an outer diameter of not more than about 0.040 inch between the proximal end and the distal region.
20. The device of claim 16 , wherein the tubular member has a substantially uniform outer cross-section such that a delivery sheath may pass easily over the occlusion device when the occlusion device is backloaded into the delivery sheath.
21. An occlusion device for sealing a puncture through tissue, comprising:
an elongate tubular member comprising a proximal end, a distal end sized for insertion into a puncture, a lumen extending at least partially between the proximal and distal ends, and a port in a proximal region of the tubular member communicating with the lumen;
an expandable occlusion element carried on a distal region of the tubular member, the occlusion element having an interior communicating with a distal opening in the lumen; an elongate piston member comprising a distal end movable within the lumen of the tubular member; and
a fluid loading device connectable around the proximal region of the tubular member such that the fluid loading device communicates with the port for delivering fluid from the fluid loading device into the lumen of the tubular member,
wherein the piston member is movable relative to the tubular member such that, when the piston member distal end is advanced distally beyond the port within the lumen, fluid loaded into the lumen is isolated from the fluid loading device, and the piston is movable for delivering fluid into, and drawing fluid out of, the interior of the occlusion element to thereby expand and collapse the occlusion element.
22. The device of claim 21 , wherein the tubular member has a uniform outside diameter extending between the proximal end and the distal region.
23. The device of claim 22 , wherein the tubular member is configured to accommodate at least one procedure device being advanced over the outside of the tubular member while the occlusion element is expanded.
24. The device of claim 21 , wherein the fluid loading device comprises a barrel connectable around the proximal region of the tubular member such that the barrel surrounds the tubular member and the fluid loading device communicates with the port for delivering fluid from the fluid loading device into the lumen of the tubular member.