Methods for manufacturing a stent frame
A support structure includes strut members interconnected by articulated joints to form a series of linked scissor mechanisms. The structure can be remotely actuated to compress or expand its shape by adjusting the scissor joints within a range of motion. In particular, the support structure can be repositioned within the body lumen or retrieved from the lumen. The support structure can be employed to introduce and support a prosthetic valve within a body lumen.
1. A method of fabricating an articulated support structure, comprising:
placing a plurality of pins through openings in an alignment plate;
placing a plurality of eyelets onto the plurality of pins;
layering a plurality of strut members each having a plurality of orifices onto the plurality of pins by placing the pins through the orifices;
connecting the plurality of strut members into a chain having a first end and a second end by swaging the eyelets; and
wrapping the chain into a tubular structure by connecting the first and second ends of the chain.
2. The method of claim 1 , further comprising placing a plurality of valve leaflets onto the plurality of pins; wherein at least one of the plurality of strut members is layered below each valve leaflet, and at least one of the plurality of strut members is layered above each valve leaflet.
3. The method of claim 2 , further comprising biasing the valve leaflets into a closed configuration after wrapping the chain into a tubular structure, by rotating at least one of the plurality of strut members from a first position to a second position.
4. The method of claim 2 , further comprising placing a skirt material onto the plurality of pins, wherein at least one of the plurality of strut members is layered below the skirt material, and at least one of the plurality of strut members is layered above the skirt material.
5. The method of claim 4 , further comprising attaching an actuator to the articulated support structure, wherein the actuator is configured to reversibly and incrementally adjust the articulated support structure between an expanded configuration and a compressed configuration.
6. The method of claim 2 , further comprising attaching the articulated support structure to a second articulated support structure.
7. The method of claim 6 , further comprising attaching an actuator to the second articulated support structure, wherein the actuator is configured to reversibly and incrementally adjust the articulated support structure and the second articulated support structure between an expanded configuration and a compressed configuration.
8. The method of claim 1 , further comprising placing a skirt material onto the plurality of pins, wherein at least one of the plurality of strut members is layered below the skirt material, and at least one of the plurality of strut members is layered above the skirt material.
9. The method of claim 8 , further comprising attaching the articulated support structure to a second articulated support structure.
10. The method of claim 9 , further comprising attaching an actuator to the articulated support structure, wherein the actuator is configured to reversibly and incrementally adjust the articulated support structure and the second articulated support structure between an expanded configuration and a compressed configuration.
11. The method of claim 1 , further comprising place a skirt material onto the plurality of pins before any of the strut members are placed.
12. The method of claim 11 , further comprising tucking the skirt material in between at least two of the plurality of strut members.
13. The method of claim 12 , wherein the tucking is performed without using suture.
14. The method of claim 11 , wherein tucking is performed by pivoting a folding pin against one strut of the plurality of strut members to wrap the skirt material over the one strut.
15. The method of claim 14 , further comprising inserting the pin under the one strut after wrapping the skirt material over the one strut.
16. The method of claim 15 , further comprising holding the skirt material against the one strut by piercing the skirt material at two different locations with the folding pin.
17. A method of fabricating an articulated support structure, comprising:
interlinking a plurality of strut members into a flattened chain having a first end and a second end, wherein each of the plurality of strut members comprises a plurality of orifices, comprising:
placing a plurality of alignment guides through at least one orifice of each of the plurality of strut members, wherein each of the plurality of alignment guides is placed through the orifices of at least two strut members;
securing the at least two strut members together;
removing the plurality of alignment guides from the orifice; and
connecting the first end of the flattened chain to the second end of the flattened chain to form a tubular structure.
18. The method of claim 17 , further comprising securing a valve comprising a plurality of valve leaflets to the support structure, wherein securing the valve to the support structure comprises sandwiching the valve leaflets between the strut members.
19. The method of claim 18 , further comprising:
interlinking a second plurality of strut members into a second flattened chain having a first end and a second end, wherein each of the second plurality of strut members comprises a plurality of orifices, comprising:
placing a second plurality of alignment guides through at least one orifice of each of the second plurality of strut members, wherein each of the second plurality of alignment guides is placed through the orifices of at least two strut members of the second plurality of strut members;
securing the at least two strut members of the second plurality of strut members together;
removing the second plurality of alignment guides from the orifice; and
connecting the first end of the second flattened chain to the second end of the second flattened chain to form a second tubular structure; and
securing a skirt to the second tubular structure, wherein securing the skirt to the second tubular structure comprises sandwiching the skirt between the strut members.
20. The method of claim 17 , wherein the plurality of strut members comprises a plurality of coaptation strut members, further comprising:
rotating the coaptation struts from a first position to a second position to bias the valve toward a closed configuration.
21. The method of claim 17 , further comprising securing a skirt to the support structure, wherein securing the skirt to the support structure comprises sandwiching the skirt between the strut members.