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1. (WO2018143115) BIOABSORBABLE STENT

Pub. No.:    WO/2018/143115    International Application No.:    PCT/JP2018/002669
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Tue Jan 30 00:59:59 CET 2018
IPC: A61F 2/915
A61L 31/00
A61L 31/12
A61P 41/00
Applicants: KAKE EDUCATIONAL INSTITUTION OKAYAMA UNIVERSITY OF SCIENCE
学校法人加計学園岡山理科大学
JAPAN MEDICAL DEVICE TECHNOLOGY CO., LTD.
株式会社日本医療機器技研
Inventors: SHIMIZU, Ichiro
清水 一郎
WADA, Akira
和田 晃
SASAKI, Makoto
佐々木 誠
Title: BIOABSORBABLE STENT
Abstract:
Provided is a bioabsorbable stent that has adequate strength, is highly robust and flexible, and has excellent expandability. This bioabsorbable stent is characterized in that a plurality of first tubular units in which a plurality of substantially U-shaped cells provided with a substantially straight portion and a substantially arcuate portion and opening at one end in an axial direction are linked together, and a plurality of second tubular units which have the same shape as the first tubular unit and have a substantially U-shape opening in a direction opposite to that of first cells are arranged sequentially in such a way as to enclose a central axis of the stent, wherein linking members link the substantially straight portions of some cells from among the plurality of opposing cells in the adjacent tubular units, and a ratio between a width (wT) at a top portion of the arcuate portions of the cells to a width (wS) at the substantially straight portions of the cells and a ratio between a cell height (h) and a cell width (w) are selected such that a maximum principal stress (σmax) during stent expansion is less than a tensile strength (S) of the constituent material of the cells.