Delivery and exchange catheter for storing guidewire
A support catheter for stowing and exchanging guidewires and other working elements comprises a catheter body having a proximal region and a distal region. A single, contiguous lumen is formed from the proximal region through the distal region and has a larger proximal cross-sectional area than distal cross-sectional area.
1. A support catheter comprising:
a catheter body having a length in the range from 100 cm to 180 cm, a proximal region, a distal region, and a single contiguous lumen extending through the proximal and distal regions, the single contiguous lumen having a proximal portion through the proximal region of the catheter body and a distal portion through the distal region of the catheter body;
wherein the proximal region with the proximal portion of the single contiguous lumen and the distal region with the distal portion of the single contiguous lumen are configured to extend into a blood vessel through a vasculature access site;
wherein a cross-sectional area of the proximal portion of the single contiguous lumen is larger than a cross-sectional area of the distal portion of the single contiguous lumen so that two or more devices can be held in the proximal portion of the single contiguous lumen while the distal portion of the single contiguous lumen is large enough to accommodate only one of the devices; and
wherein the proximal portion of the single contiguous lumen of the catheter body is configured to simultaneously accommodate the two or more devices therein while positioned within the blood vessel.
2. A support catheter as in claim 1 , wherein at least a first axial ridge is disposed along a wall of the proximal portion of the single contiguous lumen, said ridge being configured to confine the elongate devices within the lumen.
3. A support catheter as in claim 2 , wherein at least a second axial ridge is disposed along the wall of the proximal portion of the single contiguous lumen opposite to the first axial ridge.
4. A support catheter as in claim 3 , wherein at least three axial ridges are disposed along the wall of the proximal portion of the single contiguous lumen, said three ridges being configured to confine at least three elongate devices within the lumen.
5. A support catheter as in claim 1 , wherein the catheter body comprises a continuous extrusion including both the proximal and distal regions.
6. A support catheter as in claim 1 , wherein the catheter body comprises at least two separate extrusions which are joined together directly or indirectly.
7. A support catheter as in claim 1 , wherein the catheter body comprises a hypotube.
8. A support catheter as in claim 7 , wherein the catheter body comprises a hypotube over at least a section of the proximal region and/or the distal region.
9. A support catheter as in claim 1 , wherein the proximal region has a length in the range from 75 cm to 175 cm and the distal region has a length in the range from 5 cm to 25 cm.
10. A support catheter as in claim 9 , wherein the cross-sectional area of the proximal region is in the range from 0.2 mm 2 to 1.6 mm 2 and the cross-sectional area of the distal region is in the range from 0.1 mm 2 to 0.8 mm 2 .
11. A support catheter as in claim 1 , further comprising one or more radiopaque markers disposed at or near a distal end of the proximal region of the catheter body.
12. A support catheter as in claim 1 , further comprising one or more radiopaque markers disposed at or near a distal end of the distal region of the catheter body.
13. A support catheter as in claim 1 , further comprising a hub attached to a proximal end of the catheter body.
14. A support catheter as in claim 13 , wherein the hub includes only a single connector for receiving multiple working devices.
15. A support catheter as in claim 13 , wherein the hub includes at least two connectors for receiving multiple working devices.
16. A support catheter as in claim 13 , wherein a proximal end of the single contiguous lumen is tapered to align multiple working devices as they enter the lumen through the hub.
17. A method for exchanging devices in a body lumen, said method comprising:
introducing a support catheter to a target location in the body lumen, the support catheter including a catheter body having a single contiguous lumen having a proximal portion through a proximal region of the catheter body and a distal portion through the distal region of the catheter body;
simultaneously accommodating first and second elongate devices in the proximal portion of the single contiguous lumen of the support catheter with the proximal region of the catheter body positioned in the body lumen; and
selectively advancing one of the first and second elongate devices at a time through the distal portion of the single contiguous lumen of the support catheter to the target location, wherein a cross-sectional area of the distal portion of the single contiguous lumen is less than a cross-sectional area of the proximal portion of the single contiguous lumen.
18. A method as in claim 17 , wherein the body lumen comprises a blood vessel.
19. A method as in claim 18 , wherein the target location comprises an occlusion.
20. A method as in claim 19 , wherein the occlusion is substantially total.
21. A method as in claim 20 , wherein the first elongate device comprises a guidewire and the second elongate device comprises a drilling wire.
22. A method as in claim 17 , further comprising aligning the first and second elongate devices within the proximal portion of the single contiguous lumen without separating the devices with a complete barrier.
23. A method as in claim 22 , wherein aligning comprises providing at least one axial ridge along an inner wall of the proximal portion of the single contiguous lumen.
24. A method as in claim 23 , wherein aligning comprises providing at least two axial ridges along the inner wall.