Stent and securely-installed artificial valve replacement device having same

Patent metadata

Field	Value
Publication number	US-2016000591-A1
Application number	US-201514856872-A
Country	US
Kind code	A1
Filing date	Sep 17, 2015
Priority date	Mar 18, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

A stent and a securely-installed artificial valve replacement device having the same, the stent being of a cylindrical structure; the top of the stent is provided with a fixed ear ( 60 ); the fixed ear ( 60 ) has a neck portion ( 601 ) connected to the top of the stent, and a head portion ( 602 ) engaged with the fixed head of the stent; the head portion ( 602 ) has a bending structure for improving the overall radial thickness; and the artificial valve replacement device is comprised of a stent and a prosthetic valve fixed on the stent. The stent with a bending structure overcomes the problem of easily disengaging from the fixed head of the stent, while not affecting the release of the stent.

First claim

What is claimed is:

1 . A stent, wherein the stent is a cylindrical structure, a top edge of the stent is provided with at least one fixed ear, each fixed ear includes a neck portion connected to the top edge of the stent and a head portion engaging with a stent fixing head, and the head portion is provided with a bent structure configured to increase an overall radial thickness of the stent.

2 . The stent according to claim 1 , wherein the whole head portion or a part of the head portion is the bent structure.

3 . The stent according to claim 2 , wherein a ratio of a radial thickness of the bent structure to a radial thickness of the neck portion equals 1.2˜3:1.

4 . The stent according to claim 1 , wherein the head portion is substantially are-shaped, and a concave portion of the arc shape is positioned towards an axis of the stent.

5 . The stent according to claim 1 , wherein the head portion is substantially wave-shaped.

6 . The stent according to claim 1 , wherein two side edges of the head portion are bent towards each other.

7 . The stent according to claim 6 , wherein a bent angle of each of the two side edges is at 160-180 degrees.

8 . The stent according to claim 1 , wherein a top edge of the head portion is bent towards the neck portion.

9 . The stent according to claim 8 , wherein a bent angle of the top edge is at 160-180 degrees.

10 . A stably-mounted artificial valve replacement device, comprising a stent and a prosthesis valve fixed on the stent; wherein the stent is a cylindrical structure, a top edge of the stent is provided with at least one fixed ear, each fixed ear includes a neck portion connected to the top edge of the stent and a head portion engaging with a stent fixing head, and the head portion is provided with a bent structure configured to increase an overall radial thickness of the stent.

Assignees

• Venus Medtech Hangzhou Inc

Inventors

• Lei Rongjun
• Zhang Zhifei
• Zhang Qiming

Classifications

• A61F2230/0019

  rectangular · CPC title

• A61F2/2436

  Deployment by retracting a sheath · CPC title

• A61F2230/0021

  square · CPC title

• A61F2210/0014

  using shape memory or superelastic materials, e.g. nitinol · CPC title

• A61F2230/0006

  circular · CPC title