STENTLESS ARTIFICIAL MITRAL VALVE, ARTIFICIAL VALVE LEAFLET, TEMPLATE AND CUTTER

• US 20130013058A1
• Filed: 07/06/2011
• Published: 01/10/2013
• Est. Priority Date: 07/06/2011
• Status: Active Grant

• Current Assignee: Waseda University (Waseda University Educational Association)
• Original Assignee: Waseda University (Waseda University Educational Association)
• Inventors: Umezu, Mitsuo, Kasegawa, Hitoshi
• Granted Patent: US 8,603,162 B2
• Time in Patent Office: Days
• US Class Current: 623/2.12
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• 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 2240/005 Templates
• CPC Class Codes: A61F 2250/0082 specially designed for children, e.g. having means for adjusting to their growth

Abstract

An artificial mitral valve 10 is provided with a ring 12 divided along the circumferential direction into two; an anterior cusp-side region 44 and a posterior cusp-side region 45 and an artificial valve leaflet 11 connected along an outer edge of the ring 12. The artificial valve leaflet 11 is made up of a symmetric anterior cusp forming member 14 connected to the anterior cusp-side region 44 and a symmetric posterior cusp forming member 15 connected to the posterior cusp-side region 45. The anterior cusp forming member 14 is provided with an upper edge 17 joined to the ring 12 and a lower edge 22 connected to the upper edge 17 and forming a bifurcated portion 20. The upper edge 17 is made up of a pair of right and left inclined edges 24 inclined inward and upward from the right and left sides and a curved edge 25 interposed between the inclined edges 24 and curve-shaped along a reference region 48 of the anterior cusp-side region 44. The posterior cusp forming member 15 is provided with an upper edge 31 joined to the ring 12 and a lower edge 37 connected to the upper edge 31 and forming a bifurcated portion 35.

Claims

1. A stentless artificial mitral valve comprising a ring and artificial valve leaflets connected along an outer edge of the ring,

wherein the ring is divided along the circumferential direction into two;

an anterior cusp-side region and a posterior cusp-side region,

the artificial valve leaflet includes anterior cusp forming members connected to the anterior cusp-side region and symmetric posterior cusp forming members connected to the posterior cusp-side region,

the anterior cusp forming member includes an upper edge joined to the ring and a lower edge connected to the upper edge and forming a bifurcated portion which is open downward,

the upper edge is made up of a pair of right and left inclined edges inclined inward and upward from right and left ends and a curved edge interposed between the inclined edges and having a curved shape of part of the anterior cusp-side region, and

the posterior cusp forming member includes an upper edge joined to the ring and a lower edge connected to the upper edge and forming a bifurcated portion which is open downward.

3. A template for forming the artificial valve leaflet according to claim 1 or 2, comprising:

an anterior cusp hole having an inner edge portion corresponding to an outside shape of the anterior cusp forming member; and

a posterior cusp hole having an inner edge portion corresponding to an outside shape of the posterior cusp forming member.

4. A cutter for forming the artificial valve leaflet according to claim 1 or 2, comprising a blade portion having a shape corresponding to the outside shape of the anterior cusp forming member and/or the outside shape of the posterior cusp forming member.

2. An artificial valve leaflet implanted into the heart and functioning as an artificial valve, comprising an anterior cusp forming member and a posterior cusp forming member,

wherein the anterior cusp forming member includes an upper edge sewn to a valve annulus of the heart and a lower edge connected to the upper edge and forming a bifurcated portion which is open downward,

the upper edge is made up of a pair of right and left inclined edges inclined inward and upward from right and left ends and a curved edge interposed between the inclined edges and having a curved shape, and

the posterior cusp forming member includes an upper edge sewn to the valve annulus and a lower edge connected to the upper edge and forming a bifurcated portion which is open downward.