| abstract |
An intravascular stent (100, 200, 300) comprises a matrix with a hollowed-out area, and at least one development structure (103, 201, 301). Each development structure (103, 201, 301) comprises a fixed body and a development material (105, 208, 307) filled in the fixed body. The fixed body is connected to the matrix, and is at least partially disposed in the hollowed-out area. An envelope enclosed area of all the development materials (105, 208, 307) in each development structure (103, 201, 301) is less than or equal to 2 mm 2 , and a sum of effective areas of all the development materials (105, 208, 307) in each development structure (103, 201, 301) is greater than or equal to 0.15 mm 2 , wherein a ratio of the sum of the effective materials to the envelope enclosed area is greater than or equal to 1:5. The development structure (103, 201, 301) has a desirable development effect, and basically does not affect a pressed holding diameter of the intravascular stent (100, 200, 300). |