Systems and methods for endoluminal valve creation
A device for manipulating tissue at a vessel includes an elongated member having a proximal end and a distal end, a guide member at the distal end of the elongated member, the guide member having a blunt distal tip for engagement against an interior wall of the vessel, and a tissue cutting device at the distal end of the elongated member, wherein the tissue cutting device has a sharp tip that is proximal to the blunt distal tip of the guide member.
1. A method for gaining controlled access to an interior portion of a wall of a blood vessel, the method comprising:
providing an elongated member having a longitudinal axis, a proximal portion and a distal portion having (a) a wall tensioning mechanism, and (b) a slanted surface spanning a length of the distal portion in a longitudinal direction and extending across a cross-section of the elongated member, wherein the slanted surface forms an acute angle with respect to the longitudinal axis;
positioning the distal portion of the elongated member at a treatment site within a lumen of the blood vessel such that the elongated member extends along a longitudinal axis of the blood vessel;
while at least the length of the distal portion remains extending along the longitudinal axis of the blood vessel, positioning the slanted surface in apposition with a first portion of the blood vessel wall at the treatment site, thereby conforming the portion to the slanted surface to position the portion at the acute angle;
extending a tissue penetrating element from a port on the slanted surface to penetrate an interior surface of the blood vessel wall along the portion in apposition with the slanted surface; and
expanding the wall tensioning mechanism at the treatment site such that the wall tensioning mechanism projects radially outwardly away from a side of the distal portion opposite the slanted surface and contacts a second portion of the blood vessel wall circumferentially opposite the first portion while pushing the slanted surface into the first portion of the blood vessel wall such that the first portion of conforms to the slanted surface.
2. The method of claim 1 , wherein the wall tensioning mechanism and the slanted surface are located at the same location along the longitudinal axis of the elongated member.
3. The method of claim 1 , further comprising advancing the tissue penetrating element distally within an interior region of the vessel wall while the wall tensioning mechanism is expanded and the slanted surface is in apposition with the portion of the blood vessel wall.
4. The method of claim 1 , wherein the tissue penetrating element comprises a tube having a lumen, and wherein the method further comprises delivering fluid through the lumen of the tissue penetrating element to an interior region of the blood vessel wall at the treatment site.
5. The method of claim 1 , further comprising delivering fluid via the tissue penetrating element to an interior region of the blood vessel wall at the treatment site.
6. The method of claim 1 , further comprising delivering fluid via the tissue penetrating element to an interior region of the blood vessel wall, thereby creating a pocket inside the blood vessel wall.
7. The method of claim 1 , further comprising creating a pocket within the blood vessel wall at the treatment site.
8. The method of claim 1 , wherein extending the tissue penetrating element from the port on the slanted surface includes penetrating the blood vessel wall without puncturing through the blood vessel wall.
9. The method of claim 1 , further comprising creating a leaflet from the blood vessel wall at the treatment site.
10. The method of claim 9 , wherein the leaflet has a length measured along a longitudinal axis of the vessel.
11. The method of claim 1 , further comprising advancing the tissue penetrating element within the blood vessel wall generally parallel to the longitudinal axis of the blood vessel.
12. The method of claim 1 , further comprising advancing the tissue penetrating element within the blood vessel wall generally parallel to the longitudinal axis of the distal portion.
13. The method of claim 1 , further comprising advancing the tissue penetrating element generally parallel to the longitudinal axis of the blood vessel between an inner layer and an outer layer of the blood vessel wall.
14. The method of claim 1 , wherein extending the tissue penetrating element creates a space within the wall of the blood vessel, and wherein the method further comprises positioning a component in the space for increasing a size of the space.
15. A method for gaining access to an interior region of a wall of a blood vessel, the method comprising:
providing an elongated member having a longitudinal axis, a proximal portion, a distal portion, and a wall tensioning mechanism at the distal portion, wherein the distal portion includes a slanted surface extending across a cross-section of the elongated member that forms an acute angle with respect to the longitudinal axis;
positioning the distal portion of the elongated member at a treatment site within a lumen of the blood vessel;
expanding the wall tensioning mechanism at the treatment site to position a portion of the blood vessel wall at the treatment site in apposition with the slanted surface, thereby conforming the portion of the blood vessel wall to the slanted surface and positioning the portion at the acute angle with respect to the longitudinal axis of the elongated member; and
penetrating an inner surface of the blood vessel wall along the portion in apposition with the slanted surface by extending a tissue penetrating element distally from a port positioned along the slanted surface, thereby gaining access to an interior region of the blood vessel wall.
16. The method of claim 15 , wherein the elongated member includes an inflation lumen in fluid communication with the wall tensioning mechanism.
17. The method of claim 15 , wherein extending the tissue penetrating element creates a space within the wall of the blood vessel, and wherein the method further comprises placing a component in the space for increasing a size of the space.
18. The method of claim 17 , wherein the component comprises an expandable member or an articulable member.
19. The method of claim 15 , further comprising delivering fluid via the tissue penetrating element to the interior region of the blood vessel wall at the treatment site.
20. The method of claim 15 , wherein penetrating the blood vessel wall occurs without puncturing through the blood vessel wall.