Title:
BIOABSORBABLE STENT
Document Type and Number:
WIPO Patent Application WO/2018/143115
Kind Code:
A1
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.
Inventors:
SHIMIZU ICHIRO (JP)
WADA AKIRA (JP)
SASAKI MAKOTO (JP)
WADA AKIRA (JP)
SASAKI MAKOTO (JP)
Application Number:
PCT/JP2018/002669
Publication Date:
August 09, 2018
Filing Date:
January 29, 2018
Export Citation:
Assignee:
KAKE EDUCATIONAL INSTITUTION OKAYAMA UNIV OF SCIENCE (JP)
JAPAN MEDICAL DEVICE TECH CO LTD (JP)
JAPAN MEDICAL DEVICE TECH CO LTD (JP)
International Classes:
A61F2/915; A61L31/00; A61L31/12; A61P41/00
Domestic Patent References:
| WO2016037115A1 | 2016-03-10 |
Foreign References:
| JP2016214633A | 2016-12-22 | |||
| EP1212986A1 | 2002-06-12 | |||
| JP2013539661A | 2013-10-28 | |||
| US20010044649A1 | 2001-11-22 | |||
| JP2015154925A | 2015-08-27 | |||
| JP2007325921A | 2007-12-20 | |||
| JP3654627B2 | 2005-06-02 | |||
| JP3145720U | 2008-10-16 | |||
| JP5684133B2 | 2015-03-11 | |||
| ES2207407A1 | 2004-05-16 | |||
| JP2013215487A | 2013-10-24 |
Other References:
See also references of EP 3578142A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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