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 a steep and controlled access path into a vascular lumen is disclosed. Methods for using the device are also disclosed.
1. A method for creating a self-sealing tract in a blood vessel using a device comprising a first introducer and a second introducer, the method comprising:
a. advancing the first introducer into the vessel wall through a first arteriotomy that has a first angle with respect to the vessel wall;
b. applying a force to the first introducer to position a portion of the vessel wall adjacent the first introducer in a desired configuration relative to the first introducer;
c. while maintaining the vessel wall portion in the desired configuration with the first introducer, advancing the second introducer through a proximal extension of the first introducer and through a blood vessel wall to create a substantially diagonal tract through the vessel wall wherein a distal portion of the tract defines a second angle with respect to the vessel wall, wherein the first angle is larger than the second angle, and wherein the tract is defined between overlapping tissue portions of the vessel wall; and
d. expanding the tract with a sheath so that a procedure may be performed therethrough, wherein after the procedure has been performed and the device and sheath have been withdrawn from the tract, blood pressure acting on the vessel causes the overlapping tissue portions to collapse and self-seal.
2. The method of claim 1 wherein the method comprises:
advancing the first introducer through the vessel wall into a lumen of the vessel, wherein at least a portion of the first introducer is used to locate an inner surface of a lumen wall; and
advancing the second introducer through the vessel wall above the inner surface of the lumen wall, to create the tract.
3. The method of claim 2 further comprising delivering a drug within the lumen of vessel.
4. The method of claim 1 further comprising delivering a drug within the vessel wall.
5. The method of claim 1 wherein the vessel wall comprises intima, media, adventitia, or a combination thereof.
6. The method of claim 2 wherein at least one of the first or second introducers comprises a lumen and wherein the method further comprises introducing a guidewire through the lumen of the first or second introducer.
7. The method of claim 1 wherein the tract comprises at least two distinct segments.
8. The method of claim 1 wherein the tract has a diameter of about 1.0 mm to about 10.2 mm.
9. The method of claim 1 further comprising advancing the second introducer into a lumen of the vessel.
10. The method of claim 9 wherein the first angle and the second angle form an introduction angle relative to each other.
11. The method of claim 10 wherein when the second introducer enters the lumen, the introduction angle is less than or equal to about 19°.
12. The method of claim 10 wherein when the second introducer enters the lumen, the introduction angle is less than or equal to about 15°.
13. The method of claim 10 wherein when the second introducer enters the lumen, the introduction angle is from about 5° to about 10°.