Threaded coil

1. A threaded device, the device comprising:

a first elastically deformable wire and a second elastically deformable wire spiraled about a longitudinal axis, the first elastically deformable wire and the second elastically deformable wire defining a lumen therethrough that is adapted to receive a guidewire, the first elastically deformable wire and the second elastically deformable wire being spirally interlocked to form a continuous coil including at least one thread on a radially outer surface of the coil, the thread being formed from at least a portion of each of the first elastically deformable wire and the second elastically deformable wire.

2. The device of claim 1 , wherein the first elastically deformable wire has a projection and a recessed portion, the projection defining the thread on the radially outer surface.

3. The device of claim 1 , wherein the first elastically deformable wire is a major coil and the second elastically deformable wire is a minor coil.

4. The device of claim 3 , wherein the major coil has a major coil length and the minor coil has a minor coil length, a pitch of the thread being a sum of the major coil length and the minor coil length.

5. The device of claim 3 , wherein the major coil has a major coil outer diameter in a range of 0.030 inches to 0.105 inches.

6. The device of claim 1 , wherein the lumen has a lumen diameter in a range of 0.025 inches to 0.100 inches.

7. The device of claim 1 , wherein the at least one of the first elastically deformable wire and the second elastically deformable wire includes a shape memory material.

8. An intravascular device delivery system, the system comprising:

an elongated member having a proximal end, a distal end, and a longitudinal axis therebetween;

a threaded coil positioned near the distal end of the elongated member, the threaded coil comprising:

a first elastically deformable wire and a second elastically deformable wire spiraled about a longitudinal axis, the first elastically deformable wire and the second elastically deformable wire defining a lumen therethrough that is adapted to receive a guidewire, the first elastically deformable wire and the second elastically deformable wire being spirally interlocked to form a continuous coil including at least one thread on a radially outer surface of the continuous coil, the thread being formed from at least a portion of each of the first elastically deformable wire and the second elastically deformable wire; and

a drive cable positioned in the elongated member and extending from the proximal end to the threaded coil, the drive cable being rotationally fixed relative to the threaded coil and comprising a lumen that is adapted to receive the guidewire.

9. The system of claim 8 , wherein the elongated member includes an outer sheath and the threaded coil is longitudinally fixed relative to the outer sheath.

10. The system of claim 8 , further comprising a bearing connected to a distal end of the threaded coil.

11. The system of claim 8 , further comprising a distal end cap having complimentary threads configured to engage with the at least one thread of the threaded coil.

12. A method of delivering an intravascular device, the method comprising:

inserting an elongated member containing a threaded coil and a distal end cap into a patient's vasculature;

applying a rotational force to the threaded coil;

engaging a thread of the threaded coil with a complimentary thread of the distal end cap; and

rotating the threaded coil to apply a longitudinal force between the complimentary thread and the threaded coil to longitudinally reposition an intravascular device releasably mounted to a distal end of the threaded coil with respect to the distal end cap, a proximal end of the intravascular device being releasably mounted to the distal end of the threaded coil.

13. The method of claim 12 , wherein inserting the elongated member includes elastically deforming the threaded coil.

14. The method of claim 12 , wherein longitudinally repositioning the intravascular device comprises moving an outer sheath of the elongated member in the proximal direction relative to the threaded coil.

15. The method of claim 12 , wherein longitudinally repositioning the intravascular device comprises moving the outer sheath relative to the distal end cap.

16. The method of claim 12 , further comprising moving the threaded coil longitudinally.

17. The method of claim 12 , wherein longitudinally repositioning the intravascular device comprises moving a bearing mounted to an outer sheath to expose the intravascular device.

18. The method of claim 12 , wherein longitudinally repositioning the intravascular device comprises distally advancing the intravascular device from a distal end of an outer sheath.