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 forming a self-sealing tract in a vessel wall using a device comprising an introducer, the method comprising:
a. inserting an anchor across a vessel wall into a lumen defined by the vessel wall through a first arteriotomy that has a first angle with respect to the vessel wall;
b. applying a force to the anchor to position an adjacent portion of the vessel wall in a desired contact configuration relative to the anchor;
c. while maintaining the vessel wall portion in the desired contact configuration with the anchor, advancing the introducer through a proximal extension of the anchor and across the vessel wall to form a tract in the vessel wall, wherein a distal portion of the tract defines a second angle with respect to the vessel wall and 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 the tract includes at least one sloped region, and wherein after the procedure has been performed and the device and sheath have been withdrawn from the tract, blood pressure acting on the vessel causes the overlapping tissue portions to collapse and self-seal.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 vessel wall defines a lumen, and wherein the method comprises advancing the introducer into the lumen.
3. The method of claim 2 , wherein the vessel wall comprises intima, media, adventitia, or a combination thereof.
4. The method of claim 1 , wherein the vessel comprises an artery.
5. The method of claim 1 , wherein the tract has a diameter of about 1.0 mm to about 10.2 mm.
6. The method of claim 2 , wherein the device further comprises an anchor having an anchor longitudinal axis and the introducer has an introduction longitudinal axis that forms an introduction angle with the anchor longitudinal axis.
7. The method of claim 6 , wherein when the introducer enters the lumen, the introduction angle is less than or equal to about 19 degrees.
8. The method of claim 6 , wherein when the introducer enters the lumen, the introduction angle is less than or equal to about 15 degrees.
9. The method of claim 6 , wherein when the introducer enters the lumen, the introduction angle is from about 5 degrees to about 10 degrees.
10. The method of claim 1 , wherein the force is a proximal force configured to urge the anchor into contact against the vessel wall.
11. The method of claim 10 , wherein desired contact configuration comprises one in which a portion of the anchor is aligned to be substantially parallel with a wall surface of the lumen of the vessel.