Abstract: In an in-vivo indwelling stent, a plurality of annular bodies formed in a circular shape with linear components are arranged in an axial direction, and adjacent annular bodies are connected by connection portions. Each of the annular bodies includes connection linear portions that connect one end side bent portions and other end side bent portions. One of the connection linear portions of the annular bodies located in a central portion of the stent includes axial linear portions that have one end side vertices of the one end side bent portions as starting ends and extend so as to be parallel to the axial direction of the stent, and bent portions that have starting ends at terminal ends of the axial linear portions and extend in a circumferential direction of the stent.

Abstract: A stent includes a plurality of annular bodies formed with linear components, and connection portions. The connection portions being first pattern connection portions that connect one end side apexes and connection linear portions located closer to one end side than the one end side apexes or second pattern connection portions that connect the connection linear portions and the connection linear portions closer to the other end side than the connection linear portions, and other connection portions selected from the first or second pattern connection portions which are not selected, third pattern connection portions that connect the other end side apexes and the connection linear portions closer to the other end side than the other end side apexes, and fourth pattern connection portions that connect the one end side apexes and the other end side apexes located closer to one end side than the one end side apexes.

Abstract: The present invention provides a means for improving water-solubility of polysaccharide. A polysaccharide powder according to the present invention has a particle size distribution in which 30 vol % or more of the total volume of the powder has particle sizes of 200 to 750 ?m.

Abstract: The present invention provides a means for improving water-solubility of polysaccharide. A polysaccharide powder according to the present invention has a particle size distribution in which 30 vol or more of the total volume of the powder has particle sizes of 200 to 750 ?m.

Abstract: A method for producing an active esterified polysaccharide, the method including: subjecting a carboxy group of a carboxy group-containing polysaccharide and an agent for introducing an electrophilic group, to an esterification reaction, wherein an active esterified polysaccharide is formed; bringing the active esterified polysaccharide into contact with a polyvalent carboxylic acid; and after the active esterified polysaccharide is brought into contact with the polyvalent carboxylic acid, precipitating and collecting the resulting active esterified polysaccharide.