Bioabsorbable polymeric medical device
In embodiments there is described a cardiovascular tube-shaped lockable and expandable bioabsorbable scaffold having a low immunogenicity manufactured from a crystallizable bioabsorbable polymer composition or blend.
1. A bioabsorbable and flexible scaffold formed from expansion-crystallizable bioabsorbable polymer material and circumferential about a longitudinal axis so as to form a tube, said tube having a proximal open end and a distal open end, and being crimpable and expandable, and having a patterned shape in expanded form comprising:
a first multicomponent strut pattern helically coursing from said proximal open end to said distal open end of said tube;
a nested hoop structure comprising at least one through-hole; and
a second multicomponent strut pattern helically coursing from said proximal open end to said distal open end of said tube;
wherein a component of said first multicomponent strut pattern opposes from about 120° to about 180° a component of said second multicomponent strut pattern as each helically courses from said proximal open end to said distal open end of said tube.
2. The scaffold of claim 1 wherein the first multicomponent strut pattern is substantially the same in configuration throughout the scaffold.
3. The scaffold of claim 1 wherein the second multicomponent strut pattern is substantially the same in configuration throughout the scaffold.
4. The scaffold of claim 1 wherein the first and second multicomponent strut patterns are substantially the same in configuration throughout the scaffold.
5. The scaffold of claim 1 wherein the first multicomponent strut pattern that opposes from about 120° to about 180° the component of the second multicomponent strut pattern are substantially the same in configuration.
6. The scaffold of claim 5 wherein the components of the first and second multicomponent struts that oppose form a stylized H configuration.
7. The scaffold of claim 5 wherein the components of the first and second multicomponent struts that oppose form a stylized X configuration.
8. The scaffold of claim 5 wherein the components of the first and second multicomponent struts that oppose form a stylized S configuration.
9. The scaffold of claim 5 wherein the components of the first second multicomponent struts that oppose form a stylized 8 configuration.
10. The scaffold of claim 5 wherein the components of the first and second multicomponent struts that oppose form a stylized I configuration.
11. The scaffold of claim 1 further comprising a third multicomponent strut pattern helically coursing from said proximal open end to said distal open end of said tube.
12. The scaffold of claim 11 further comprising a fourth multicomponent strut pattern helically coursing from said proximal open end to said distal open end of said tube.
13. The scaffold of claim 12 further comprising a fifth multicomponent strut pattern helically coursing from said proximal open end to said distal open end of said tube.
14. The scaffold of claim 11 , wherein all of the helices of the multicomponent strut patterns turns about said tube in the same handed direction.
15. The scaffold of claim 1 wherein each helix of both of the multicomponent strut patterns turns about said tube in a left-handed screw direction.
16. The scaffold of claim 1 wherein each helix of both of the multicomponent strut patterns turns about said tube in a right-handed screw direction.
17. The scaffold of claim 1 wherein at least one helix of both of the multicomponent strut patterns turns about said tube in a left-handed screw direction while another helix turns in a right-handed screw direction.
18. The scaffold of claim 1 further comprising a locking means.
19. A bioabsorbable and flexible stent circumferential about a longitudinal axis so as to form a tube, said tube having a proximal open end and a distal open end, and being crimpable and expandable, and having a patterned shape in expanded form comprising a plurality of helically coursing multicomponent strut patterns from said proximal open end to said distal open end of said tube, wherein a component of each said multicomponent strut pattern opposes from about 120° to about 180° another component of another multicomponent strut pattern as each helically courses from said proximal open end to said distal open end of said tube, and where said stent has at least one hoop structure nested between said multicomponent strut patterns comprising at least one through-hole and is manufactured from a racemic polymer which crystallizes under the strain of expansion of the stent.
20. The stent of claim 19 wherein each helix of the multicomponent strut patterns turns about said stent in a left-handed screw direction.
21. The stent of claim 19 wherein each helix of both of the multicomponent strut patterns turns about said stent in a right-handed screw direction.
22. The stent of claim 19 wherein at least one helix of the multicomponent strut patterns turns in a left-handed screw direction while another helix turns about said stent in a right-handed screw direction.
23. The stent of claim 19 , wherein all of the helices of the multicomponent strut patterns turn about said stent in the same handed direction.