Systems, devices and methods for delivery systems
Delivery systems for expandable and stented implants include adjustable tensioning members that control the expansion of the implant along the length of the implant. The tensioning members are wound onto one or more rotors located on the distal segment of the delivery system, which are rotated to unwind the tensioning members and incrementally expand the implant. Positioning mechanisms are also provided to adjust the position and orientation of the implant during delivery.
1. A delivery system, comprising:
a proximal handle comprising a handle housing and a first actuator;
a catheter body coupled to the handle, the catheter body comprising a distal section, a proximal section and a middle section therebetween;
a rotatable drive shaft coupled to the first actuator and located in the catheter body;
a first stator housing attached to the catheter body, the first stator housing comprising an internal opening and an external opening;
a first rotor attached to the rotatable drive shaft and located in the first stator housing, the first rotor comprising at least one tension line attachment site; and
a movable sheath located over the catheter body;
a second stator housing attached to the catheter body and spaced apart from the first stator housing, the second stator housing comprising an internal opening and an external opening;
a second rotor attached to the rotatable drive shaft and located in the second stator housing, the second rotor comprising at least one tension line attachment site.
2. The delivery system of claim 1 , further comprising:
a self-expanding implant, the implant comprising a contracted configuration and an expanded configuration; and
a first tensioning member releasably coupled to the self-expanding implant and fixedly coupled to the attachment site of the first rotor.
3. The delivery system of claim 2 , wherein the first tensioning member is further wound around the first rotor.
4. The delivery system of claim 3 , wherein the first tensioning member is wound around the first rotor at least three times.
5. The delivery system of claim 1 , further comprising:
a third stator housing attached to the catheter body and spaced apart from the first and second stator housings, the third stator housing comprising an internal opening and an external opening;
a third rotor attached to the rotatable drive shaft and located in the third stator housing, the third rotor comprising at least one tension line attachment site.
6. The delivery system of claim 5 , wherein the first stator housing is larger than the second stator housing and the first rotor is larger than the second rotor.
7. The delivery system of claim 5 , wherein the first stator housing is larger than both the second and third stator housings and the first rotor is larger than the second and third rotors.
8. The delivery system of claim 1 , wherein the proximal handle further comprise a first actuator lock, wherein the first actuator lock comprises locked and unlocked configurations and is biased to the lock configuration.
9. The delivery system of claim 1 , further comprising a catheter extension assembly configured to reversibly adjust a longitudinal spacing between the distal section and the middle section of the catheter body.
10. The delivery system of claim 9 , wherein the catheter extension assembly comprises a proximal housing with a proximal threaded lumen, a distal housing and a threaded extension shaft located in the proximal threaded lumen and coupled to the distal housing.
11. The delivery system of claim 10 , wherein the proximal housing and distal housing comprise a slotted interface therebetween to resist rotational displacement therebetween.
12. The delivery system of claim 10 , wherein the proximal handle further comprises a second actuator coupled to the threaded extension shaft.
13. The delivery system of claim 9 , further comprising a first steering assembly comprising a first segmented tubular body and a first plurality of elongate steering wires.
14. The delivery system of claim 13 , wherein the first steering assembly is located proximal to the catheter extension assembly.
15. The delivery system of claim 13 , wherein the first segmented tubular body comprises a laser-cut tubular body.
16. The delivery system of claim 13 , further comprising a second steering assembly comprising a second segmented tubular body and a second plurality of steering wires.
17. The delivery system of claim 13 , wherein the second steering assembly is located distal to the catheter extension assembly.
18. The delivery system of claim 16 , wherein the first steering assembly and second steering assembly comprise different bending configurations.
19. The delivery system of claim 16 , wherein the first steering assembly comprises a two-way steering assembly and the second steering assembly comprises a four-way steering assembly.
20. The delivery system of claim 16 , wherein the first segmented tubular body comprises segments attached by living hinges.
21. The delivery system of claim 20 , wherein the second segmented tubular body comprises a plurality of discrete segments.
22. The delivery system of claim 21 , wherein each of the plurality of discrete segments comprises one or two non-planar end openings.
23. The delivery system of claim 22 , wherein the non-planar end openings comprise a hyperbolic paraboloid shape.
24. The delivery system of claim 23 , wherein the each of the plurality of discrete segments comprises a perimeter bumper.