A woven fabric comprising at least one thread (101) and a thread structure (102) having a contracted and expanded shape, the structure comprising a proximal portion (103) and a distal portion (104) A longitudinal axis (105) extending between the proximal and distal portions, wherein at least one of the proximal and distal portions is generally perpendicular to the longitudinal axis Includes a peripheral edge (107, 108) having a first radius of curvature (109, 109 ′) and a second radius of curvature (110, 110 ′), wherein the first radius of curvature is the second radius of curvature. Different medical implantable occlusion devices (100, 200) are disclosed. [Selection] Figure 2少なくとも１本の糸（１０１）と、収縮形状及び膨張形状を有する糸の構造体（１０２）とから成る織布を備え、構造体は、近位部分（１０３）及び遠位部分（１０４）と、近位部分と遠位部分との間に延出する長手方向軸（１０５）とを備え、近位部分及び遠位部分のうち少なくとも一方の部分は、長手方向軸に対してほぼ垂直な方向に第１の曲率半径（１０９、１０９’）及び第２の曲率半径（１１０、１１０’）を有する周囲縁部（１０７、１０８）を備え、第１の曲率半径は第２の曲率半径とは異なる医療用植え込み型閉塞デバイス（１００、２００）が開示される。【選択図】 図２
