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1. (WO2018139647) HIGH PERFORMANCE BIOABSORBABLE STENT

Pub. No.:    WO/2018/139647    International Application No.:    PCT/JP2018/002753
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Tue Jan 30 00:59:59 CET 2018
IPC: A61L 31/02
A61F 2/82
A61L 31/12
Applicants: JAPAN MEDICAL DEVICE TECHNOLOGY CO., LTD.
株式会社日本医療機器技研
FUJI LIGHT METAL CO., LTD.
不二ライトメタル株式会社
Inventors: SASAKI, Makoto
佐々木 誠
KOGA, Yuki
古閑 雄貴
OKAZAWA, Yuki
岡澤 祐輝
UEDA, Hironori
上田 祐規
INOUE, Masashi
井上 正士
Title: HIGH PERFORMANCE BIOABSORBABLE STENT
Abstract:
Provided is a stent which has excellent deformation characteristics, is capable of maintaining a radial force for an extended period of time, and is bioabsorbable. Provided is a bioabsorbable stent which has a core structure comprising a magnesium alloy, characterized in that the core structure has a smooth surface formed from a magnesium alloy which contains at least 90% by mass Mg as a main component, and Zn, Zr and Mn as secondary components, does not contain aluminum or at least one type of rare earth from among Sc, Y, Dy, Sm, Ce, Gd and La, and in which the content of unavoidable impurities selected from the group comprising Fe, Ni, Co and Cu is at most equal to 30 ppm, and in that a corrosion protection layer having a hydrophilic smooth surface and having magnesium fluoride as a main component is formed on the smooth surface of the core structure comprising said magnesium alloy. Also provided is a method of manufacturing said bioabsorbable stent.