Stentless artificial mitral valve

• US 8,603,162 B2
• Filed: 07/06/2011
• Issued: 12/10/2013
• 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
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US13/177,183
• Publication Number:
  US 20130013058A1
• Time in Patent Office: 888 Days
• Field of Search: 623/1.24, 623/1.26, 623 212- 219
• 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 has a ring, an anterior cusp-side region, a posterior cusp-side region and a valve leaflet connected along an outer edge of the ring. The valve leaflet includes an anterior cusp forming member connected to the anterior cusp-side region and a posterior cusp forming member connected to the posterior cusp-side region. The anterior cusp forming member has an upper edge joined to the ring and a lower edge that forms a bifurcated portion. The upper edge is made up of a pair of right and left edges that incline inward and upward from the right and left sides, and a curved edge interposed between the inclined edges that curves along the anterior cusp-side region. The posterior cusp forming member has an upper edge joined to the ring and a lower edge that forms a bifurcated portion.

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 leaflets comprise an anterior cusp forming member connected to the anterior cusp-side region and a posterior cusp forming member 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;

wherein the bifurcated portion of the anterior cusp forming member is separate and unattached from the bifurcated portion of the posterior cusp forming member, and thus the bifurcated portions are adapted to be sewn onto native heart tissues during implantation.