Shanghai Microport Medical (group) Co., Ltd.

Microport Neurotech (shanghai) Co., Ltd.

Shanghai Micoport Medical (group) Co., Ltd.

Juan Hou

Wei Wang

Jing Wang

Qiyi Luo

Hongyan Jiang

Yahong Kang

Chenyang Liu

Fanhe Meng

Ye Qian

A radiopaque structure, a stent and a thrombectomy system are disclosed. The radiopaque structure includes: at least one protrusion each for securing, supporting and connecting a radiopaque sleeve (); at least one radiopaque sleeve () disposed over the respective at least one protrusion; and at least one filler () filled in a gap between the radiopaque sleeve () and the protrusion. Compared with the prior art, the radiopaque mechanism can enhance fluoroscopic visibility of radiopaque dots disposed at a distal end of a laser-cut thrombectomy device and solves the problem that not all metal struts in the laser-cut thrombectomy device can be seen under fluoroscopic imaging. The radiopaque structure can be used in any types of stent and is not limited to being used in a thrombectomy device.

Developing structure, stent, and thrombectomy system

A biodegradable cross-linked polymer and methods of preparing same are provided. The biodegradable cross-linked polymer is formed from a biodegradable polymeric material having two or more arms, which is a random copolymer formed of a first monomer and a second monomer different from the first monomer. The first monomer is selected from the group consisting of L-lactide, DL-lactide, glycolid, &#x3b5;-caprolactone, trimethylene carbonate, p-dioxanone, amino acid-derived polycarbonates and polyorthoesters. The second monomer is one or two selected from the group consisting of D-lactide, DL-lactide, glycolide, &#x3b5;-caprolactone, trimethyl carbonate, salicylic acid, carbonates, amino acids and derivatives thereof. The biodegradable polymeric material has a molecular weight of from 5,000 to 1,200,000 and an intrinsic viscosity of from 0.1 to 9.0 dl/g. Each of the terminal groups on the arms of the biodegradable polymeric material is selected from the group consisting of hydroxyl amino and carboxyl groups.

Biodegradable cross-linked polymer and methods of preparing the same

The present invention relates to the field of medical instruments. Specifically, a biodegradable cross-linked polymer and a manufacturing method therefor are provided. The cross-linked polymer is obtained by bonding crosslinkable reactive groups to terminal groups of a biodegradable prepolymer having two or more arms and further subjecting the prepolymer to thermal polymerization and/or light irradiation. The cross-linked polymer has an elastic modulus of 10-4,500 MPa, and a degradation rate of 3-36 months. A biodegradable vascular stent and a preparation method therefor are also provided. The vascular stent is formed by laser cutting of polymeric tubing having a three-dimensional cross-linked network structure. The vascular stent has ample mechanical strength, a high elastic modulus at body temperature, and a regulatable degradation rate.

Biodegradable cross-linked polymer, vascular stent and manufacturing methods therefor

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Shanghai, China

Juan Hou