Access and closure device and method
Devices and methods for accessing and closing vascular sites are disclosed. Self-sealing closure devices and methods are disclosed. A device that can make both steeply sloping and flat access paths into a vascular lumen is disclosed. The device can also form arteriotomies with sections cleaved between a vessel's intimae and adventitia. Methods for using the device are also disclosed.
1. A method for creating a self-sealing opening in a blood vessel using a device comprising a delivery guide, a delivery guide extension configured to articulate about an articulating region with respect to the delivery guide, an introduction device deployable from the delivery guide and having an introduction longitudinal axis, and an anchor having an anchor longitudinal axis, wherein the introduction longitudinal axis forms an introduction angle with the anchor longitudinal axis, the method comprising:
a. advancing the anchor into a lumen of a blood vessel through a first arteriotomy defining a first angle with respect to the blood vessel;
b. utilizing a position of the anchor relative to the blood vessel to establish an orientation of the introduction device relative to the blood vessel;
c. introducing the introduction device through a proximal extension of the anchor and through a wall of the blood vessel to create a substantially diagonal tract through the blood vessel wall wherein a distal portion of the tract defines a second angle with respect to the wall of the blood vessel, wherein the first angle is larger than the second angle;
d. advancing the introduction device into the lumen, wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0 degrees to about 30 degrees; and
e. advancing an introducer sheath into the tract to expand the tract so that a procedure may be performed therethrough, wherein the majority of the tract extends between an inner surface and an outer surface of the blood vessel wall, and wherein after the procedure has been performed and the introduction device has been withdrawn from the tract, blood pressure acting on the blood vessel wall causes first and second opposed tissue portions defining the tract to contact each other and self-seal.
2. The method of claim 1 , further comprising articulating the delivery guide extension about the articulating region.
3. The method of claim 1 , wherein the articulating region comprises an articulating member.
4. The method of claim 3 , wherein the articulating member comprises a hinge.
5. The method of claim 1 , further comprising applying pressure to the tract.
6. The method of claim 1 , wherein the introducer sheath is advanced over the introduction device.
7. The method of claim 6 , wherein at least one of the introduction device and the introducer sheath comprises a lumen and wherein the method further comprises introducing a guidewire through the lumen of the introduction device or the introducer sheath.
8. The method of claim 1 , wherein the blood vessel wall comprises intimae, media, adventitia, or a combination thereof.
9. The method of claim 1 , wherein the tract comprises at least two distinct segments.
10. The method of claim 1 , wherein the articulating region comprises a flexible region of the delivery guide extension.
11. The method of claim 1 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0° to about 19°.
12. The method of claim 1 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0° to about 15°.
13. The method of claim 1 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 5° to about 10°.
14. The method of claim 1 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value of about 10°.
15. The method of claim 1 , wherein the position of the anchor relative to the tissue wall comprises one in which a portion of the anchor is aligned to be substantially parallel with a wall surface of the lumen of the tissue wall.
16. The method of claim 1 , further comprising applying a force to the anchor to position an adjacent portion of the tissue wall in a desired contact configuration relative to the anchor.
17. The method of claim 16 , further comprising maintaining the tissue wall portion in the desired contact configuration while advancing the introduction device into the lumen.
18. A method for creating a self-sealing opening in a blood vessel using a device comprising a delivery guide, a delivery guide extension configured to articulate about an articulating region with respect to the delivery guide, an introduction device deployable from the delivery guide and having an introduction longitudinal axis, and an anchor having an anchor longitudinal axis, wherein the introduction longitudinal axis forms an introduction angle with the anchor longitudinal axis, the method comprising:
a. advancing the anchor into a lumen defined by a tissue wall through a pathway defining a first angle with respect to the tissue wall;
b. utilizing a position of the anchor relative to the tissue wall to establish an orientation of the introduction device relative to the tissue wall;
c. creating a tract with the introduction device within the tissue wall;
d. advancing the introduction device a proximal extension of the anchor and into the lumen to thereby extend the tract into the lumen, wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0 degrees to about 30 degrees, and wherein a distal portion of the tract defines a distal tract second angle with respect to the tissue wall, and wherein the first angle is larger than the second angle; and
e. advancing an introducer sheath into the tract to expand the tract so that a procedure may be performed therethrough, wherein a majority of the tract extends between an inner surface and an outer surface of the tissue wall, and wherein after the procedure has been performed and the introduction device has been withdrawn from the tract, blood pressure acting on the tissue wall causes first and second opposed tissue portions defining the tract to contact each other and self-seal.
19. The method of claim 18 , further comprising articulating the delivery guide extension about the articulating region.
20. The method of claim 18 , wherein the articulating region comprises an articulating member.
21. The method of claim 20 , wherein the articulating member comprises a hinge.
22. The method of claim 18 , further comprising applying pressure to the tract.
23. The method of claim 18 , wherein the tissue comprises a blood vessel.
24. The method of claim 18 , wherein the tract includes at least one sloped region.
25. The method of claim 18 , wherein the articulating region comprises a flexible region of the delivery guide extension.
26. The method of claim 18 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0° to about 19°.
27. The method of claim 18 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 0° to about 15°.
28. The method of claim 18 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value from about 5° to about 10°.
29. The method of claim 18 , wherein when the introduction device enters the lumen, the introduction angle has an absolute value of about 10°.
30. The method of claim 18 , wherein the position of the anchor relative to the tissue wall comprises one in which a portion of the anchor is aligned to be substantially parallel with a wall surface of the lumen of the tissue wall.
31. The method of claim 18 , further comprising applying a force to the anchor to position an adjacent portion of the tissue wall in a desired contact configuration relative to the anchor.
32. The method of claim 31 , further comprising maintaining the tissue wall portion in the desired contact configuration while advancing the introduction device into the lumen.