Single access flow-reversal catheter devices and methods
Embodiments herein include devices and methods directed toward creating reverse flow within a vessel and thereby providing protection against embolic debris. Embodiments comprise a catheter and a plurality of occluders that are expandable and adjustable within a lumen to create low-pressure areas that reroute blood flow and embolic debris therein.
1. A single-access catheter device comprising:
a first catheter having a proximal and distal opening with a lumen therethrough;
a first occluder located within a distal region of the first catheter;
a second occluder located proximal to the first occluder;
a return port located proximal to the second occluder; and
a conduit connecting the distal opening of the first catheter to the return port,
wherein the distance between the first occluder and the second occluder is adjustable, and
wherein when the first occluder is expanded in a vessel, a pressure gradient causes blood to flow into the conduit through the distal opening of the first catheter;
wherein the conduit routes blood outside the vessel.
2. The device of claim 1 , further comprising a second catheter concentric around the first catheter wherein the second occluder is coupled to the second catheter.
3. The device of claim 2 , wherein the second catheter is slideably coupled to the first catheter.
4. The device of claim 3 , further comprising an introducer sheath wherein the introducer sheath is concentric around the first catheter and the second catheter.
5. The device of claim 4 , wherein the return port comprises a distal opening of the introducer sheath.
6. The device of claim 5 , further comprising a third occluder coupled to an elongate member, wherein the distance between the third occluder and the first occluder is adjustable.
7. The device of claim 6 , further comprising a filter inline of the conduit or about the return port.
8. The device of claim 7 , wherein the filter is removable.
9. The device of claim 8 , wherein the conduit comprises additional tubing and wherein the filter comprises a mesh basket inline of the additional tubing.
10. The device of claim 5 , further comprising a third occluder and a strut projecting from the distal end of the catheter, wherein the third occluder is coupled to distal portion of strut and is expandable and collapsible.
11. The device of claim 1 , wherein the pressure gradient is created by an external pump fluidly connected to the conduit.
12. The device of claim 11 , wherein the external pump comprises an aspirator.
13. A single-access catheter device comprising:
a first catheter having a proximal and distal region with a lumen therethrough;
a first occluder located within the distal region of the first catheter;
a second occluder located proximal to the first occluder;
a return port located proximal to the second occluder; and
a conduit connecting the distal end of the first catheter to the return port, and an introducer sheath having a lumen through which the first catheter passes through,
wherein when the first occluder is expanded in a vessel, a pressure gradient causes blood to flow into the conduit through the distal end of the first catheter; and
wherein the conduit comprises at least a portion of the interstitial space between the introducer sheath and the first catheter.
14. The device of claim 13 , further comprising a second catheter concentric around the first catheter wherein the second occluder is coupled to the second catheter.
15. The device of claim 14 , wherein the second catheter is slideably coupled to the first catheter.
16. The device of claim 15 , wherein the introducer sheath is concentric around the first catheter and the second catheter.
17. The device of claim 16 , wherein the return port comprises a distal opening of the introducer sheath.
18. The device of claim 17 , further comprising a third occluder coupled to an elongate member, wherein the distance between the third occluder and the first occluder is adjustable.
19. The device of claim 18 , further comprising a filter inline of the conduit or about the return port.
20. The device of claim 19 , wherein the filter is removable.
21. The device of claim 20 , wherein the filter comprises a mesh basket inline of the conduit.
22. The device of claim 17 , further comprising a third occluder and a strut projecting from the distal end of the catheter, wherein the third occluder is coupled to distal portion of strut and is expandable and collapsible.
23. The device of claim 1 , wherein the pressure gradient is created by an external pump fluidly connected to the conduit.
24. The device of claim 23 , wherein the external pump comprises an aspirator.