Device and method for establishing an artificial arterio-venous fistula
A shunt rivet for implantation in the aorta and inferior vena cava to treat chronic obstructive pulmonary disease, and a method of treating chronic obstructive pulmonary disease.
1. A method for creating an intravascular connection, comprising:
introducing a needle from a first vessel and into a tissue wall of a second vessel;
advancing an intravascular connector through the first vessel, the intravascular connector having a first pair of clinch members comprising a first member and an apposed second member and a second pair of clinch members opposite from the first pair of clinch members and also comprising a first member and an apposed second member;
introducing the second member of the first pair and the first member of the second pair into the second vessel from the first vessel such that the respective members deploy into contact against an inner wall of the second vessel; and
deploying the first member of the first pair and the second member of the second pair into contact against an inner wall of the first vessel,
wherein the first and second pairs of clinch members have a deployed configuration longitudinally disposed relative to contiguous portions of the first and second vessels, and
wherein the first member of the first and second pair of clinch members each have a length less than each second member of the first and second pair of clinch members such that each first member is deployable on opposite ends of the connector by arcing into its deployed position.
2. The method of claim 1 wherein advancing an intravascular connector comprises advancing the connector within an outer sheath.
3. The method of claim 1 wherein prior to advancing an intravascular connector, intravascularly crossing a guidewire from the first vessel into the second vessel such that the guidewire is disposed within the first and second vessels.
4. The method of claim 3 wherein introducing comprises advancing the intravascular connector at least partially from the first vessel and into the second vessel over or along the guidewire.
5. The method of claim 1 wherein introducing comprises releasing the first member of the second pair in an arc contained within the second vessel into contact against the inner wall of the second vessel.
6. The method of claim 1 wherein deploying comprises releasing the first member of the first pair in an arc contained within the first vessel into contact against the inner wall of the first vessel.
7. The method of claim 1 further comprising adjusting a physical parameter of the intravascular connector to modify a flow rate between the first and second vessels through the connector.
8. The method of claim 7 wherein adjusting a physical parameter comprises modifying a configuration of the intravascular connector via break-away, frangible, or deformable segments comprising at least a portion of the connector.
9. The method of claim 7 wherein adjusting a physical parameter comprises adjusting a cross-sectional area of the intravascular connector to adjust the flow rate therethrough.
10. The method of claim 7 wherein adjusting a physical parameter comprises adjusting a lumen length of the intravascular connector between the first and second vessels.
11. The method of claim 7 wherein adjusting a physical parameter comprises adjusting an angle of the intravascular connector extending between the first and second vessels.
12. The method of claim 1 further comprising deploying at least a third pair of clinch members having a deployed configuration transverse to the first and second pairs such that the third pair of clinch members are biased to exert a nominal pressure on circumferentially spaced points on side walls of the first and second vessels.