STENT USED FOR IMPLANTING VALVE-IN-VALVE

WIPO Patent Application WO/2020/207330

A1

A stent used for implanting a valve-in-valve. The stent is a metal tube lattice and is provided with four rows of circumferential support rods (2, 3, 4, 5) that extend horizontally and multiple columns of axial support rods (6, 7, 8) arranged between the circumferential support rods. The axial support rods (6, 7, 8) at different rows are arranged in a criss-crossing pattern, and the axial support rods and the horizontal support rods connected thereto form a criss-crossing honeycomb grid. The area of the honeycomb grid (11) at an inflow end (9) is generally equal to the area of the honeycomb grid (12) at the middle rows, and the area of the honeycomb grid (13) at an outflow end (10) is slightly larger than the area of the honeycomb grid at the other two rows. The present invention takes into account that the valve-in-valve being implanted must be implanted inside of a valve previously implanted by means of a surgery or inside of a valve stent previously implanted but has been damaged and takes into account the fit specificity of the valve-in-valve with the valve that has been damaged or lost the function thereof. Improvement is made to existing implantation valve stents and all grids in a stent are configured to near honeycomb structures. A stent of this type of structure has a certain degree of rigidity while allowing for rapid, synchronous unfolding speed and good fit, thereby achieving better usage.

WO/2016/040382	VALVE LOCKING MECHANISM
WO/2014/102268	APPARATUS AND SET FOR FOLDING OR UNFOLDING A MEDICAL IMPLANT COMPRISING A CLAMPING MECHANISM, IMPLANT AND METHOD
WO/2019/042458	STENT APPARATUS HAVING PULL-WIRE LINKED WITH PLEATABLE SKIRT OF STENT, PROCESSING METHOD THEREFOR, SKIRT PLEATING METHOD, AND CARDIAC VALVE

JIN LEI (CN)
FAN ZHIHAO (CN)
MU HONG (CN)

PCT/CN2020/083086

October 15, 2020

April 03, 2020

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BEIJING BALANCE MEDICAL TECH CO LTD (CN)

A61F2/24

CN108430394A	2018-08-21
CN108888387A	2018-11-27
CN110074899A	2019-08-02
CN109567985A	2019-04-05
CN108904101A	2018-11-30
CN107890382A	2018-04-10
CN105287051A	2016-02-03

See also references of EP 3954329A4

BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)

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