Stent and securely-installed artificial valve replacement device having same

• US 10,098,763 B2
• Filed: 09/17/2015
• Issued: 10/16/2018
• Est. Priority Date: 03/18/2013
• Status: Active Grant

• Current Assignee: Venus Medtech (Hangzhou), Inc.
• Original Assignee: Venus Medtech (Hangzhou), Inc.
• Inventors: Lei, Rongjun, Zhang, Zhifei, Zhang, Qiming
• Primary Examiner(s): Sharma, Yashita
• Assistant Examiner(s): Preston, Rebecca
• Application Number:
  US14/856,872
• Publication Number:
  US 20160000591A1
• Time in Patent Office: 1,125 Days
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0019 rectangular
• CPC Class Codes: A61F 2230/0021 square
• CPC Class Codes: A61F 2230/0052 : T-shaped
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61F 2250/0037 : differing in height or in length
• CPC Class Codes: A61F 2250/0039 : differing in diameter
• CPC Class Codes: A61F 2250/0052 : differing in bone ingrowth capacity

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.

Claims

1. A foldable stent, comprising:

a cylindrical structure having a top edge,

at least one fixed ear provided at the top edge, each fixed ear includes;

a neck portion connected to the top edge of the stent, and

a head portion configured to engage with a stent fixing head, the head portion having a width greater than a width of the neck portion in a circumferential direction of the stent, wherein

each head portion has a fixed end connected to the neck portion and a free end extending from the fixed end, the free end being bent relative to the fixed end, and an overall radial thickness of the head portion being increased by the bent free end, and

and wherein the fixed end and the free end of the head portion are arranged next to one another in a radial direction of the stent.

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

3. The stent according to claim 2, wherein a ratio of a radial thickness of the whole head portion or the part of the head portion that is bent to a radial thickness of the neck portion equals 2:

1.

4. The stent according to claim 1, wherein the free end is formed by a top edge of the head portion bending towards the neck portion.

5. The stent according to claim 4, wherein a bent angle of the top edge is from 160-180 degrees.

6. The foldable stem according to claim 1, wherein the fixed end and the free end of the head portion are substantially parallel to each other.

7. The foldable stent according to claim 1, wherein the head portion is bent in an axial direction of the stent.

8. A stably-mounted artificial valve replacement device, comprising a stent according to claim 1 and a prosthesis valve fixed to the stent.