Devices for fluid flow through body passages

1. A method of diverting fluid flow from an artery to a vein in a limb, the method comprising:

inserting a first catheter in the artery;

inserting a second catheter in the vein;

deploying a needle from the first catheter, through tissue between the artery and the vein, and into the vein; and

deploying a device at a deployment site in the artery, the vein, and the tissue between the artery and the vein, the device comprising:

a first end portion having a first end diameter sized to correspond to a diameter of the artery,

a second end portion having a second end diameter sized to correspond to a diameter of the vein, and

an intermediate portion between the first end portion and the second end portion,

wherein deploying the device comprises:

expanding the first end portion coaxial with and against sidewalls of the artery, wherein expanding the first end portion comprises self-expanding the first end portion,

expanding the intermediate portion, wherein expanding the intermediate portion comprises self-expanding the intermediate portion, and

expanding the second end portion coaxial with and against sidewalls of the vein, wherein expanding the second end portion comprises self-expanding the second end portion, and

wherein the artery is unobstructed at a distal location proximate to the deployment site and at a proximal location proximate to the deployment site, wherein the device comprises a shunt configured for dialysis access.

2. The method of claim 1 , wherein the device further comprises a graft material coupled to at least the intermediate portion.

3. The method of claim 1 , wherein the device further comprises a graft material coupled to at least the intermediate portion, and wherein deploying the device comprises:

inserting a guidewire through the needle;

retracting the needle and the first catheter;

guiding a delivery catheter carrying the device using the guidewire; and

deploying the device from the delivery catheter.

4. A method of diverting fluid flow from an artery to a vein in a limb, the method comprising:

inserting a first catheter in the artery, wherein the artery is unobstructed;

inserting a second catheter in the vein;

deploying a needle from the first catheter, through tissue between the artery and the vein, and into the vein; and

deploying a device in the artery, the vein, and the tissue between the artery and the vein, the device comprising:

a first end portion,

a second end portion, and

an intermediate portion located between the first end portion and the second end portion, the intermediate portion being diametrically expandable to dilate at least the intermediate portion,

wherein the device is configured for dialysis access.

5. The method of claim 4 , wherein deploying the device comprises self-expanding at least one of the first end portion, the second end portion, and the intermediate portion.

6. The method of claim 4 , wherein the device further comprises a graft material coupled to at least the intermediate portion, and wherein deploying the device comprises:

inserting a guidewire through the needle;

retracting the needle and the first catheter;

guiding a delivery catheter carrying the device using the guidewire;

expanding the first end portion coaxial with and against sidewalls of the artery; and

expanding the second end portion coaxial with and against sidewalls of the vein.

7. The method of claim 4 , wherein the device comprises a shunt configured for dialysis access.

8. A method of diverting fluid flow from an artery to a vein in a limb, the method comprising:

inserting a first catheter in the artery;

inserting a second catheter in the vein;

deploying a needle at a deployment location from the first catheter, through tissue between the artery and the vein, and into the vein; and

deploying a device in the artery, the vein, and the tissue between the artery and the vein, the device comprising:

a first end portion, and

a second end portion,

wherein the artery is unobstructed proximate to the deployment location,

wherein deploying the device comprises:

expanding the first end portion coaxial with and against sidewalls of the artery,

expanding the second end portion coaxial with and against sidewalls of the vein,

wherein the artery and the vein are located in a limb of a patient.

9. The method of claim 8 , wherein the first end portion has a first end diameter sized to correspond to a diameter of the artery, and wherein the second end portion has a second end diameter sized to correspond to a diameter of the vein.

10. The method of claim 8 , wherein the device further comprises an intermediate portion located between the first end portion and the second end portion.

11. The method of claim 10 , wherein deploying the device comprises self-expanding at least one of the first end portion, the second end portion, and the intermediate portion.

12. The method of claim 8 , wherein the device further comprises an intermediate portion located between the first end portion and the second end portion, wherein the device comprises a graft material coupled to at least the intermediate portion, and wherein deploying the device comprises:

expanding the intermediate portion,

inserting a guidewire through the needle;

retracting the needle and the first catheter;

guiding a delivery catheter carrying the device using the guidewire; and

deploying the device from the delivery catheter.

13. The method of claim 8 , wherein the device comprises a shunt.