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, wherein the proximal section of the catheter body is coupled to the proximal handle and wherein the middle section and distal section extend distally from the proximal handle;
a rotatable drive shaft coupled to the first actuator and located in the catheter body;
a first stator housing attached to the distal section of the catheter body and distal from the proximal handle, the first stator housing comprising an internal opening and an external opening;
a first rotor disc attached to the rotatable drive shaft and located in the first stator housing, the first rotor disc comprising a plurality of tension line attachment sites; and
a movable sheath located over the catheter body, wherein the sheath is configured to retract and expose the distal section.
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 one of the plurality of tension line attachment sites of the first rotor disc.
3. The delivery system of claim 2 , wherein the first tensioning member is further wound around the rotatable drive shaft inside the first stator housing.
4. The delivery system of claim 3 , wherein the first tensioning member is wound around the rotatable drive shaft inside the first stator housing at least three times.
5. 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.
6. 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.
7. The delivery system of claim 6 , 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.
8. The delivery system of claim 7 , wherein the proximal housing and distal housing comprise a slotted interface therebetween to resist rotational displacement therebetween.
9. The delivery system of claim 7 , wherein the proximal handle further comprises a second actuator coupled to the threaded extension shaft.
10. The delivery system of claim 6 , further comprising a first steering assembly comprising a first segmented tubular body and a first plurality of elongate steering wires.
11. The delivery system of claim 10 , wherein the first steering assembly is located proximal to the catheter extension assembly.
12. The delivery system of claim 10 , wherein the first segmented tubular body comprises a laser-cut tubular body.
13. The delivery system of claim 10 , further comprising a second steering assembly comprising a second segmented tubular body and a second plurality of steering wires.
14. The delivery system of claim 13 , wherein the second steering assembly is located distal to the catheter extension assembly.
15. The delivery system of claim 13 , wherein the first steering assembly and second steering assembly comprise different bending configurations.
16. The delivery system of claim 13 , wherein the first steering assembly comprises a two-way steering assembly and the second steering assembly comprises a four-way steering assembly.
17. The delivery system of claim 13 , wherein the first segmented tubular body comprises segments attached by living hinges.
18. The delivery system of claim 17 , wherein the second segmented tubular body comprises a plurality of discrete segments.
19. The delivery system of claim 18 , wherein each of the plurality of discrete segments comprises one or two non-planar end openings.
20. The delivery system of claim 19 , wherein the non-planar end openings comprise a hyperbolic paraboloid shape.
21. The delivery system of claim 20 , wherein the each of the plurality of discrete segments comprises a perimeter bumper.