2results about How to "Good radial support" patented technology

The application discloses a large vein stent for treating venous diseases, and particularly discloses a venous stent with radial support and flexibility, which comprises a first stent and a second stent, the first stent comprises a first overlapping section and a first support section connected with the first overlapping section, and the second stent comprises a second overlapping section and a second support section connected with the second overlapping section.The venous stent can realize good overlapping and cooperation of the first stent and the second stent, and the overlapping and fixing of the two stents have better stability without increasing the overlapping length.The first stent has better flexibility, and the second stent has better radial support, so that the whole has both flexibility and radial support.

This invention relates to the field of medical materials technology, and discloses a biodegradable esophageal stent and its preparation method. The esophageal stent is woven from blended monofilaments. The raw materials for the blended monofilaments include polylactic acid, polycaprolactone, and additives, including polyethylene glycol, carbon nanofibers, star-shaped PLA-PCL block copolymer, and talc. The preparation steps are as follows: the raw materials are mixed in proportion, melt-blended and granulated, and then the blended monofilaments are obtained using a high-pressure capillary rheometer; the blended monofilaments are woven into a mesh-like stent framework on a mold using an interlaced pressing method, then heat-set, and demolded after cooling; a thermoplastic polyurethane casting liquid loaded with bioactive substances is cast into a film and coated onto the inner wall of the stent framework; the thermoplastic polyurethane film is heated to fuse with the stent framework, and after cooling, the esophageal stent is formed. The esophageal stent of this invention has good mechanical properties, controllable degradation characteristics, and biocompatibility.