US 12,465,507 B2
Absorbable stent
Wenjiao Lin, Shenzhen (CN); and Wenchao Fu, Shenzhen (CN)
Assigned to BIOTYX MEDICAL (SHENZHEN) CO., LTD, Shenzhen (CN)
Filed by BIOTYX MEDICAL (SHENZHEN) CO., LTD, Shenzhen (CN)
Filed on Jan. 21, 2022, as Appl. No. 17/580,928.
Application 17/580,928 is a continuation in part of application No. 16/474,226, granted, now 11,253,380, previously published as PCT/CN2017/117122, filed on Dec. 19, 2017.
Claims priority of application No. 201611271031.6 (CN), filed on Dec. 31, 2016.
Prior Publication US 2022/0142795 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/82 (2013.01); A61F 2/915 (2013.01); A61L 31/02 (2006.01); A61L 31/10 (2006.01); A61L 31/14 (2006.01); A61L 31/16 (2006.01)
CPC A61F 2/82 (2013.01) [A61F 2/915 (2013.01); A61L 31/022 (2013.01); A61L 31/10 (2013.01); A61L 31/148 (2013.01); A61L 31/16 (2013.01); A61F 2210/0004 (2013.01); A61F 2220/0016 (2013.01); A61F 2230/0028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An absorbable stent, comprising: an absorbable matrix, the absorbable matrix comprising a plurality of wave-shaped rings arrayed axially; two adjacent wave-shaped rings in the plurality of wave-shaped rings are connected by a connection unit; each wave-shaped ring comprises a plurality of circumferentially arrayed waves; each wave comprises a peak, a valley, and a supporting strut connecting the peak with the valley; two adjacent wave-shaped rings in the plurality of wave-shaped rings and the connection units form a closed side branch unit; and the absorbable matrix volume per unit vascular area is in the range of 4 μm to 40 μm;
wherein, when the absorbable matrix is expanded to a rated diameter, an included angle α of the supporting struts is in the range of 60 degrees to 100 degrees;
wherein a ratio of a strut width to a wall thickness of each supporting strut is in the range of 1 to 2;
wherein, when the rated diameter of the absorbable matrix is in the range of 1 mm to 5 mm, the section length L of each supporting strut is in the range of 0.5 mm to 1.35 mm and the absorbable matrix volume per unit vascular area is in the range of 4 μm to 13 μm;
wherein, when the rated diameter of the absorbable matrix is in the range of 5 mm to 15 mm, the section length L of each supporting strut is in the range of 0.9 mm to 3.5 mm and the absorbable matrix volume per unit vascular area is in the range of 8 μm to 25 μm;
wherein, when the rated diameter of the absorbable matrix is in the range of 15 mm to 40 mm, the section length L of each supporting strut is in the range of 1.8 mm to 8 mm and the absorbable matrix volume per unit vascular area is in the range of 11 μm to 40 μm; and
wherein a fillet is formed on the supporting strut, in cross-section of the supporting strut.