INVASIVE CARDIAC VALVE

• US 20120316642A1
• Filed: 12/30/2010
• Published: 12/13/2012
• Est. Priority Date: 12/30/2009
• Status: Active Grant

• Current Assignee: Shanghai Microport Cardioflow Medtech Co., Ltd. (MicroPort Scientific Corp.)
• Original Assignee: MicroPort Medical (Jiaxing) Co., Ltd. (MicroPort Scientific Corp.)
• Inventors: Luo, Qiyi, Yu, Qifeng, Liu, Xiang, Wang, Yunlei, Yue, Chengyun
• Granted Patent: US 9,095,431 B2
• Time in Patent Office: Days
• US Class Current: 623/2.13
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2415 Manufacturing methods
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2002/3021 frustoconical
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0021 square
• CPC Class Codes: A61F 2230/0023 triangular
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

An invasive cardiac valve comprises a tubular stent (1) and a valve (2). One end of the tubular stent (1) is of a frusto-conical structure, the other end is wide open, and the diameter of the open end is greater than the diameter of the frusto-conical end. The valve (2) is attached to the frusto-conical end of the tubular stent (1); and a delivery and retrieval hole (4) of the cardiac valve is provided at the top of the open end of the tubular stent (1). Because the diameter of the open end is greater than the diameter of the frusto-conical end, the cardiac valve can be effectively fixed in a position of aortic annulus to prevent the cardiac valve displacement caused by the impact of the blood flow. Because the valve (2) is attached to the frusto-conical end of the tubular stent (1), the valve (2) can totally avoid the left and right coronary ostia and does not affect the haemodynamics of the coronary artery. Because a delivery and retrieval hole (4) of the cardiac valve is provided at the top of the open end of the tubular stent (1), the cardiac valve can be retrieved and reset at any time by handle control if it is found to be placed in an improper position during the release process.

Claims

1. An invasive cardiac valve, comprising a tubular stent and a valve, characterized in that

one end of the tubular stent is of a frusto-conical structure, the other end of the tubular stent is wide open, and the diameter of the open end is greater than the diameter of the frusto-conical end;

the valve is attached to the frusto-conical end of the tubular stent;

a delivery and retrieval hole of the cardiac valve is provided at the top of the open end of the tubular stent;

a frusto-cone generatrix of the frusto-conical end of the tubular stent is a straight line, a circular arc or a combination of a straight line and a circular arc.

2. The invasive cardiac valve according to claim 1, characterized in that the open end of the tubular stent is of a horn shape, and the tubular stent is of a structure, in which both ends of the tubular stent are large and a middle part of the tubular stent is small.

3. The invasive cardiac valve according to claim 2, characterized in that the tubular stent is of a grid structure composed of a plurality of rhombic stent units.

4. The invasive cardiac valve according to claim 2, characterized in that except for both ends, the inside grids of the tubular stent are of a closed structure.

5. The invasive cardiac valve according to claim 3, characterized in that the grids of the tubular stent gradually become smaller from the open end to the frusto-conical end.

6. The invasive cardiac valve according to claim 5, characterized in that the grid at the opening is greater than the diameter of left and right coronary arteries.

7. The invasive cardiac valve according to claim 6, characterized in that the grid of the tubular stent is composed of stent rods, and the greater the grid is, the thicker the stent rod is.

8. The invasive cardiac valve according to claim 7, characterized in that the open end of the tubular stent is composed of three rhombic grids which expand towards the surrounding in a petal shape, and there are three delivery and retrieval holes of the cardiac valve, which are provided at the top ends of the three rhombic grids respectively.

9. The invasive cardiac valve according to claim 1, characterized in that the tubular stent is made of a nickel-titanium alloy material.

10. The invasive cardiac valve according to claim 1, characterized in that the valve is fixed inside the tubular stent by means of sewing using a suture line.

11. The invasive cardiac valve according to claim 9, characterized in that the valve is embodied as a leaflet and a skirt;

and

the leaflet and the skirt are designed as an integral structure or a separated structure in which the leaflet is sewed on the skirt.

12. The invasive cardiac valve according to claim 11, characterized in that the leaflet can be made of a biological tissue, a polymer material, a metallic material or a tissue engineered valve.

13. The invasive cardiac valve according to claim 11, characterized in that the leaflet and the skirt adopt the separated structure, the skirt is sewed on the grid of the tubular stent, and the leaflet is sewed on the skirt or sewed on both the skirt and the grid of the stent.

14. The invasive cardiac valve according to claim 13, characterized in that the skirt can be made of a biological tissue, a polymer material, a metallic material or a tissue engineered valve.

15. The invasive cardiac valve according to claim 11, characterized in that the skirt is of a frusto-conical shape sewed by three skirt base bodies of a same trapezoidal shape.

16. The invasive cardiac valve according to claim 13, characterized in that a base of the leaflet is of an arc structure, leaflet suture ears are provided at both ends of the base of the leaflet, the leaflet suture ears are sewed on the tubular stent, any two adjacent leaflet suture ears are sewed together by means of a suture line of one valve and another valve, and the leaflet and the skirt are sewed along an arc line of the base of the leaflet.

17. The invasive cardiac valve according to claim 11, characterized in that the valve adopts the integral structure of the skirt and the leaflet, the valve is sewed on the grid of the tubular stent, and a middle part of the valve is sewed with a transverse arc line using a suture line.

18. The invasive cardiac valve according to claim 17, characterized in that the valve can be made of a biological tissue, a polymer material, a metallic material or a tissue engineered valve.

19. The invasive cardiac valve according to claim 17, characterized in that the valve is formed by three valve base bodies of the same shape;

at one end of the valve base body, both sides are provided with leaflet suture ears, which are sewed on the tubular stent;

roots of any two adjacent leaflet suture ears are sewed together; and

the transverse arc line sewed on the valve base body is sutured with the grid of the stent.