Devices and methods for catheter alignment
A launching catheter for targeting a second vessel from a first vessel includes a catheter including a proximal portion and a distal portion including a needle aperture and a flat rectangular radiopaque marker. The flat rectangular radiopaque marker disappears under fluoroscopy upon rotation to provide information about rotational alignment of the launching catheter. The launching catheter includes a needle configured to extend through the needle aperture. A method of aligning the catheter includes rotating the catheter in a first blood vessel until the marker has a thickness (e.g., minimal thickness) under fluoroscopy. The thickness indicates rotational alignment of the catheter.
1. A launching catheter for targeting a second vessel from a first vessel, the launching catheter comprising:
a catheter comprising:
a lumen;
a longitudinal axis;
a guidewire lumen configured to receive a guidewire;
a proximal portion; and
a distal portion comprising:
a needle aperture, and
a flat rectangular radiopaque marker being on a side of the catheter, the radiopaque marker having a thickness between 0.001 mm and 1 mm, the radiopaque marker being monitorable under fluoroscopy to provide information about rotational orientation of the catheter, the radiopaque marker being configured to change in thickness as viewed under fluoroscopy as the catheter is rotated about the longitudinal axis of the catheter,
wherein the radiopaque marker appears thicker when the side of the catheter faces towards or away from an imaging device,
wherein the radiopaque marker appears thinner when the side of the catheter is perpendicular to the imaging device, and
wherein the radiopaque marker appearing thin or disappearing between the guidewire lumen and the second vessel indicates alignment of the needle aperture to the second vessel;
a needle being configured to move relative to the radiopaque marker and to extend through the needle aperture, out of the first vessel, and into the second vessel; and
a profile being positioned within the lumen of the catheter, the profile comprising a profile shape being complementary to a shape of the lumen of the catheter, the profile being configured to receive the needle through the profile to inhibit lateral movement of the needle relative to the longitudinal axis of the catheter prior to extension of the needle through the needle aperture,
wherein a rotational position of the radiopaque marker relative to the guidewire indicates a rotational direction of extension of the needle.
2. The launching catheter of claim 1 , wherein the needle aperture is located on the side of the catheter.
3. The launching catheter of claim 1 , wherein the needle aperture is located proximal to the radiopaque marker.
4. The launching catheter of claim 1 ,
wherein the radiopaque marker appears to disappear as viewed under fluoroscopy when a plane defined by a length and a width of the radiopaque marker is perpendicular to the imaging device,
wherein the needle aperture is located on the side of the catheter, and
wherein the needle aperture is located proximal to the radiopaque marker.
5. The launching catheter of claim 1 , wherein the needle aperture is located on the side of the catheter, and wherein the needle aperture is located proximal to the radiopaque marker.
6. The launching catheter of claim 1 , wherein the needle aperture is located on a side of the catheter opposite the side of the catheter.
7. The launching catheter of claim 1 , wherein the needle aperture is located distal to the radiopaque marker.
8. The launching catheter of claim 1 , wherein the radiopaque marker appears to disappear as viewed under fluoroscopy when a plane defined by a length and a width of the radiopaque marker is perpendicular to the imaging device.
9. The launching catheter of claim 1 , wherein the distal portion of the catheter comprises a first material and a second material, the radiopaque marker comprising the first material, and wherein the first material is visibly distinct from the second material when viewed under fluoroscopy.
10. A launching catheter for targeting a second vessel from a first vessel, the launching catheter comprising:
a catheter comprising:
a lumen;
a longitudinal axis;
a guidewire lumen configured to receive a guidewire;
a proximal portion; and
a distal portion comprising:
a needle aperture, and
a flat rectangular radiopaque marker being on a side of the catheter, the radiopaque marker having a thickness between 0.001 mm and 1 mm, the radiopaque marker being monitorable under fluoroscopy to provide information about rotational orientation of the catheter, the radiopaque marker being configured to change in thickness as viewed under fluoroscopy as the catheter is rotated about the longitudinal axis of the catheter,
wherein the radiopaque marker appears thicker when the side of the catheter faces towards or away from an imaging device,
wherein the radiopaque marker appears thinner when the side of the catheter is perpendicular to the imaging device, and
wherein the radiopaque marker appearing thin or disappearing between the guidewire lumen and the second vessel indicates alignment of the needle aperture to the second vessel; and
a needle being configured to move relative to the radiopaque marker and to extend through the needle aperture, out of the first vessel, and into the second vessel;
wherein a rotational position of the radiopaque marker relative to the guidewire indicates a rotational direction of extension of the needle.
11. The launching catheter of claim 10 , wherein the needle aperture is located on the side of the catheter.
12. The launching catheter of claim 10 , wherein the needle aperture is located proximal to the radiopaque marker.
13. The launching catheter of claim 10 ,
wherein the radiopaque marker appears to disappear as viewed under fluoroscopy when a plane defined by a length and a width of the radiopaque marker is perpendicular to the imaging device,
wherein the needle aperture is located on the side of the catheter, and
wherein the needle aperture is located proximal to the radiopaque marker.
14. The launching catheter of claim 10 , wherein the needle aperture is located on the side of the catheter, and wherein the needle aperture is located proximal to the radiopaque marker.
15. The launching catheter of claim 10 , wherein the needle aperture is located on a side of the catheter opposite the side of the catheter.
16. The launching catheter of claim 10 , wherein the needle aperture is located distal to the radiopaque marker.
17. The launching catheter of claim 10 , wherein the radiopaque marker appears to disappear as viewed under fluoroscopy when a plane defined by a length and a width of the radiopaque marker is perpendicular to the imaging device.
18. The launching catheter of claim 10 , wherein the distal portion of the catheter comprises a first material and a second material, the radiopaque marker comprising the first material, and wherein the first material is visibly distinct from the second material when viewed under fluoroscopy.
19. A launching catheter for targeting a second vessel from a first vessel, the launching catheter comprising:
a catheter comprising:
a longitudinal axis;
a proximal portion; and
a distal portion comprising:
a needle aperture, and
a flat rectangular radiopaque marker being on a side of the catheter, the radiopaque marker having a thickness between 0.001 mm and 1 mm, the radiopaque marker being monitorable under fluoroscopy to provide information about rotational orientation of the catheter, the radiopaque marker being configured to change in thickness as viewed under fluoroscopy as the catheter is rotated about the longitudinal axis of the catheter,
wherein the radiopaque marker appears thicker when the side of the catheter faces towards or away from an imaging device,
wherein the radiopaque marker appears thinner when the side of the catheter is perpendicular to the imaging device, and
wherein the radiopaque marker appearing thin or disappearing between a guidewire lumen and the second vessel indicates alignment of the needle aperture to the second vessel; and
a needle being configured to move relative to the radiopaque marker and to extend through the needle aperture, out of the first vessel, and into the second vessel;
wherein a rotational position of the radiopaque marker relative to a guidewire indicates a rotational direction of extension of the needle.
20. The launching catheter of claim 19 , wherein the needle aperture is located on the side of the catheter.
21. The launching catheter of claim 19 , wherein the needle aperture is located proximal to the radiopaque marker.
22. The launching catheter of claim 19 ,
wherein the radiopaque marker appears to disappear as viewed under fluoroscopy when a plane defined by a length and a width of the radiopaque marker is perpendicular to the imaging device,
wherein the needle aperture is located on the side of the catheter, and
wherein the needle aperture is located proximal to the radiopaque marker.