Cardiac valve, system, and method

• US 8,932,349 B2
• Filed: 08/22/2011
• Issued: 01/13/2015
• Est. Priority Date: 09/02/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Jenson, Mark L., Drasler, William J., Lafontaine, Daniel M.
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US13/214,520
• Publication Number:
  US 20110301705A1
• Time in Patent Office: 1,240 Days
• Field of Search: 623/1.26, 623/2.12, 623/2.14, 623/2.38
• US Class Current: 623/2.14
• 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 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2230/008 paraboloidal

Abstract

A cardiac valve with a support frame having a first end member and a second end member opposing the first end member in a substantially fixed distance relationship, and a cover extending over the support frame to allow for unidirectional flow of a liquid through the valve.

Claims

1. A cardiac valve, the cardiac valve having a first valve end and a second valve end, the first end being open, the cardiac valve comprising:

a support frame having a uniform longitudinal frame length, an outer surface and an inner surface, the inner surface defining a lumen, the support frame comprising;

a first frame end member forming a first frame end, the first frame end positioned at the first valve end, the first frame end member comprising a sequence of convex curves and concave curves forming a closed ring;

a second frame end member forming a second frame end, the second frame end positioned at the second valve end, the second frame end member comprising a sequence of convex curves and concave curves forming a closed ring;

the first frame end member and the second frame end member in a fixed distance relationship; and

a cover, the cover comprising;

a first cover portion, the first cover portion being in contact with the outer surface of the support frame, the first cover portion having a uniform longitudinal length equal to the uniform longitudinal frame length;

a first valve leaflet and a second valve leaflet extending from the first cover portion, each leaflet having a variable longitudinal length;

the cardiac valve having a closed valve configuration wherein the first and second valve leaflets extend over the second frame end and between the convex curves of the second frame end member so that each leaflet projects into the lumen of the support frame thereby obstructing flow of a fluid through the lumen of the support frame; and

the cardiac valve having an open valve configuration wherein each leaflet extends away from the lumen of the support frame so that fluid freely flows through the lumen of the support frame.

2. The cardiac valve of claim 1, the cardiac valve being a bi-leaflet cardiac valve, the second frame end member comprising only two convex curves, a first convex curve and a second convex curve, the first valve leaflet extending between the first and second convex curves and the second valve leaflet extending between the first and second convex curves.

3. The cardiac valve of claim 2, each valve leaflet having an arcuate edge and a concave shape extending from the second end member to the arcuate edge when the valve is in the closed valve configuration.

4. The cardiac valve of claim 1, the cardiac valve being a tri-leaflet cardiac valve, the second frame end member comprising only three convex curves, a first convex curve, a second convex curve, and a third convex curve, the cover end portion further comprising a third valve leaflet, the first valve leaflet extending between the first and second convex curves, the second valve leaflet extending between the second and third convex curves, the third valve leaflet extending between the third and first convex curves.

5. The cardiac valve of claim 4, each valve leaflet having an arcuate edge and a concave shape extending from the second frame end member to the arcuate edge when the valve is in the closed valve configuration.

6. The cardiac valve of claim 1, wherein the cover further extends over the inner surface of the support frame and extends between the convex curves of the second frame end member to form at least a portion of the first valve leaflet and the second valve leaflet.

7. The cardiac valve of claim 6, further including a layer of material positioned between the cover extending over the inner surface and the outer surface of the support frame.

8. The cardiac valve of claim 1, wherein the first cover portion entirely covers the outer surface of the support frame.

9. The cardiac valve of claim 3, wherein the arcuate edge is positioned between the first and second frame ends when the valve is in the closed configuration.