US 12,226,326 B2
Absorbable intravascular devices that exhibit their greatest radial strength at their nominal diameters
Lewis B. Schwartz, Lake Forest, IL (US); Ivan Tzvetanov, Mountain View, CA (US); and Alex Etrada, Menlo Park, CA (US)
Assigned to EFEMORAL MEDICAL, INC.
Appl. No. 17/431,564
Filed by EFEMORAL MEDICAL, INC., Los Altos, CA (US)
PCT Filed Feb. 21, 2020, PCT No. PCT/US2020/019132
§ 371(c)(1), (2) Date Aug. 17, 2021,
PCT Pub. No. WO2020/172480, PCT Pub. Date Aug. 27, 2020.
Claims priority of provisional application 62/808,683, filed on Feb. 21, 2019.
Prior Publication US 2022/0142799 A1, May 12, 2022
Int. Cl. A61F 2/915 (2013.01); A61F 2/90 (2013.01); A61F 2/958 (2013.01); A61F 2/91 (2013.01)
CPC A61F 2/915 (2013.01) [A61F 2/90 (2013.01); A61F 2/958 (2013.01); A61F 2/91 (2013.01); A61F 2210/0004 (2013.01); A61F 2250/0039 (2013.01); A61F 2250/0067 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A device for placement within a blood vessel to maintain or enhance blood flow through the blood vessel, the device comprising:
a balloon-expandable, bioresorbable, vascular stent element configured to be implanted in the blood vessel;
wherein the stent element is formed from a bioresorbable polymer material;
wherein the stent element is configured to have a compressed state with a first diameter while crimped on a delivery balloon before placement in the blood vessel and an expanded state with a second diameter greater than the first diameter after expansion and placement in the blood vessel;
wherein the stent elements comprise a closed cell pattern comprising diamond-shaped closed cells having four sides configured to provide a first radial resistive force in the compressed state and a second radial resistive force greater than the first radial resistive force in the expanded state; and
wherein struts forming the four sides of the diamond-shaped closed cells are configured to have a substantially longitudinal alignment in the compressed state before placement in the blood vessel and a more circumferential alignment in the expanded state after expansion and placement in the blood vessel thereby the alignment of the struts forming the four sides of the diamond-shaped closed cells provide greater radial resistive force in the expanded state than the compressed state such that the second radial resistive force is above 3 N/mm and such that the stent elements have a peak radial resistive force at a diameter substantially equal to the second diameter.