Stent Deployment Device and Methods for Use

1 . A stent deployment device, comprising:

an outer sheath, wherein the outer sheath has a proximal end and a distal end;

a pull apparatus at least partially disposed within the outer sheath, wherein a portion of the pull apparatus is sized and shaped to receive a stent or a stent graft, wherein a proximal end of the pull apparatus comprises a ribbon that transitions to a pull shaft and the pull shaft then transitions to a pull tube; and

a push apparatus, wherein a portion of the push apparatus is sized to fit within a portion of the pull apparatus, wherein a proximal end of the push apparatus comprises a ribbon that transitions to a push shaft.

2 . The stent deployment device of claim 1 , further comprising a push-pull drive mechanism in mechanical communication with the pull apparatus and the push apparatus, wherein the push-pull drive mechanism includes at least a push gear and a pull gear or a push reel and a pull reel that are sized and shaped based on a stent ratio, wherein the push-pull drive mechanism comprises:

the pull reel coupled to a proximal end of the pull apparatus;

the pull gear in mechanical communication with the pull reel;

the push reel coupled to a proximal end of the push apparatus;

the push gear in mechanical communication with the push reel; and

a drive gear in mechanical communication with the push gear and the pull gear, wherein the push gear and the pull gear are sized and shaped based on the stent ratio.

3 . The stent deployment device of claim 1 , further comprising a push-pull drive mechanism in mechanical communication with the pull apparatus and the push apparatus, wherein the push-pull drive mechanism includes at least a push gear and a pull gear or a push reel and a pull reel that are sized and shaped based on a stent ratio, wherein the push-pull drive mechanism comprises:

the pull reel;

the push reel, wherein the push reel and the pull reel are sized and shaped based on the stent ratio; and

a drive gear, wherein the pull reel, the push reel and the drive gear are coupled together along a shared axis.

4 . The stent deployment device of claim 1 , further comprising a push-pull drive mechanism in mechanical communication with the pull apparatus and the push apparatus, wherein the push-pull drive mechanism includes at least a push gear and a pull gear or a push reel and a pull reel that are sized and shaped based on a stent ratio, wherein the push-pull drive mechanism comprises:

the pull reel;

the push reel; and

a drive gear, wherein the pull reel, the push reel and the drive gear are mounted on a single axle.

5 . (canceled)

6 . The stent deployment device of claim 1 , wherein the pull tube comprises a slit along the length of the pull tube.

7 . (canceled)

8 . The stent deployment device of claim 1 , further comprising a pull reel and a push reel, wherein at least a portion of the pull ribbon is wrapped around the pull reel, and wherein at least a portion of the push ribbon is wrapped around the push reel.

9 . The stent deployment device of claim 1 , wherein the push shaft defines a push central core.

10 . The stent deployment device of claim 1 , wherein the pull shaft defines a pull central core and defines a channel for receiving the push ribbon.

11 . The stent deployment device of claim 1 , wherein a portion of the outer sheath defines (i) a central core, (ii) a channel for receiving the pull ribbon, and (iii) a channel for receiving the push ribbon.

12 . The stent deployment device of claim 1 , further comprising a central core guidewire disposed within a central core defined in the outer sheath, a central core defined in the pull apparatus and a central core defined in the push apparatus.

13 . The stent deployment device of claim 2 , wherein the push gear is smaller than the pull gear.

14 . The stent deployment device of claim 3 , wherein the push reel is larger than the pull reel.

15 . The stent deployment device of claim 2 , wherein the drive gear is coupled to a motor.

16 . The stent deployment device of claim 2 , wherein the drive gear is coupled to a manual override.

17 . The stent deployment device of claim 16 , wherein the manual override comprises a thumb wheel.

18 . The stent deployment device of claim 2 , wherein the drive gear is configured to be manually turned by hand.

19 . (canceled)

20 . The stent deployment device of claim 1 , further comprising a stent restraint coupled to a distal end of the push apparatus.

21 . The stent deployment device of claim 20 , wherein the stent restraint comprises two wires with inward facing hooked ends extending from the distal end of the push apparatus and outwardly biased towards the pull apparatus.

22 . The stent deployment device of claim 1 , further comprising a push gear and a pull gear that are sized and shaped based on a stent ratio, wherein a ratio of a diameter of the pull gear to a diameter of the push gear is equal to the stent ratio plus 5-15% of the stent ratio.

23 . The stent deployment device of claim 22 , wherein the ratio of a diameter of the pull gear to a diameter of the push gear is equal to the stent ratio plus 10% of the stent ratio.

24 . The stent deployment device of claim 1 , further comprising a push reel and a pull reel that are sized and shaped based on a stent ratio, wherein a ratio of a diameter of the push reel to a diameter of the pull reel is equal to the stent ratio plus 5-15% of the stent ratio.

25 . The stent deployment device of claim 24 , wherein the ratio of the push reel diameter to the pull reel diameter is equal to the stent ratio plus 10% of the stent ratio.

26 . The stent deployment device of claim 1 , wherein a ratio of a diameter of the pull gear to a diameter of the push gear is equal to a stent ratio.

27 . The stent deployment device of claim 1 , further comprising a push reel and a pull reel that are sized and shaped based on a stent ratio, wherein a ratio of a diameter of the push reel to a diameter of the pull reel is equal to a stent ratio.

28 . A method for placement of a stent graft, the method comprising:

simultaneously advancing a stent or a stent graft distally with a push apparatus of a stent deployment device and retracting a pull apparatus of the stent deployment device proximally at two different rates based on a stent ratio; and

deploying the stent or the stent graft into a lumen, wherein the method is performed using the stent deployment device of any one of claims 1 - 27 .

29 . (canceled)

30 . The method of claim 28 , further comprising the step of recapturing the stent or the stent graft by using a stent restraint in communication with an end of the stent or the stent graft.

31 . A stent deployment device, comprising:

an outer sheath, wherein the outer sheath has a proximal end and a distal end;

a pull apparatus at least partially disposed within the outer sheath, wherein a portion of the pull apparatus is sized and shaped to receive a stent or a stent graft;

a push apparatus, wherein a portion of the push apparatus is sized to fit within a portion of the pull apparatus; and

a push-pull drive mechanism in mechanical communication with the pull apparatus and the push apparatus, wherein the push-pull drive mechanism includes at least a push gear and a pull gear or a push reel and a pull reel, wherein either a ratio of a diameter of the pull gear to a diameter of the push gear or a ratio of a diameter of the push reel to a diameter of the pull reel is equal to a stent ratio plus 5-15% of the stent ratio.