Mono Cusped Patch and Valved Conduit for Repairing Cardiac Outflow Tract

• US 20080312737A1
• Filed: 07/07/2006
• Published: 12/18/2008
• Est. Priority Date: 07/08/2005
• Status: Active Grant

• Current Assignee: Beijing Balance Medical Technology Co., Ltd.
• Original Assignee: Beijing Balance Medical Company Limited
• Inventors: Jin, Lei
• Granted Patent: US 8,267,994 B2
• Time in Patent Office: Days
• US Class Current: 623/2.15
• 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

Abstract

A mono cusped patch for repairing cardiac outflow tract is disclosed in the present invention, which comprises an inner patch, an external supporting patch and a leaflet. An approximate semicircular slit is provided on the inner patch. The inferior border of the leaflet is set between the inner patch and the external supporting patch along the slit. The inner patch, the inferior border of the leaflet and the external supporting patch are stitched together along the slit edge of the inner patch with sutures. The inferior border of the leaflet is fixed between the inner patch and the external supporting patch. According to this special stitching structure, the present invention also provides a valved conduit of good performance. The leaflets of mono cusped patch and valved conduit are sutured with the inner patch/conduit and external supporting patch/conduit to repair cardiac outflow tract, and the inferior border of leaflet is provided between the inner patch/conduit and external supporting patch/conduit, so that the present invention avoids fixing leaflet only with sutures, makes leaflets more durable and improves postoperative longtime treatment effect of patients significantly.

Claims

1. A mono cusped patch for repairing cardiac outflow tract, characterized in that, the mono cusped patch comprises an inner patch, an external supporting patch and a leaflet, an approximate semicircular slit is provided on the inner patch, the inferior border of the leaflet is set between the inner patch and the external supporting patch along the slit, and a natural valve leaflet is formed between the superior border of the leaflet and the inner patch;

the inner patch, the inferior border of the leaflet and the external supporting patch are stitched together with sutures along the slit edge of the inner patch, while the inferior border of the leaflet is fixed between the inner patch and the external supporting patch.

2. The mono cusped patch for repairing cardiac outflow tract according to claim 1, characterized in that, the part above the superior border of the leaflet of mono cusped patch for repairing heart is of monolayer structure, which only has inner Patch.

3. The mono cusped patch for repairing cardiac outflow tract according to claim 1 or claim 2, characterized in that, the inner patch extends 3.5-8.5 cm from the superior border of the leaflet while the external supporting patch and the inner patch are sutured together along the superior border of the leaflet, and the inner patch and the external supporting patch extend 1.5-6.5 cm from the inferior border of the leaflet.

4. The mono cusped patch for repairing cardiac outflow tract according to claim 1, characterized in that, the inner patch, leaflet and external supporting patch are homologous tissue patches or heterologous tissue patches treated by chemical modification.

5. The mono cusped patch for repairing cardiac outflow tract according to claim 1, characterized in that, the heterologous tissue patches treated by chemical modification are bovine pericardial patches treated by modified anti-calcification.

6. The mono cusped patch for repairing cardiac outflow tract according to claim 1, characterized in that, several incisions are set in the part of the inferior border of the leaflet which are also between the inner patch and the external supporting patch in order to make the suture of the inferior border of the leaflet smoother.

7. A valved conduit for repairing cardiac outflow tract, characterized in that, the valved conduit consists of an inner conduit, three pieces of leaflets and an external supporting conduit;

three approximate semicircular slits are provided around the inner conduit wall;

the inferior borders of three pieces of leaflets are set between the inner conduit and the external supporting conduit respectively along three slits;

the inner conduit, peripheral parts of three pieces of leaflets and the external supporting conduit are stitched together along the slit edge of the inner conduit with sutures to make the superior borders of three pieces of leaflets matched in the inner conduit symmetrically and smoothly, and two ends of the inner conduit and the external supporting conduit of valved conduit extend to be upper conduit and lower conduit with pericardial stentless valve.

8. The valved conduit for repairing cardiac outflow tract according to claim 7, characterized in that, the inner conduit, leaflets and the external supporting conduit are homologous tissue patches or heterologous tissue patches treated by chemical modification.

9. The valved conduit for repairing cardiac outflow tract according to claim 8, characterized in that, the heterologous tissue patches treated by chemical modification are bovine pericardial patches treated by modified anti-calcification.

10. The valved conduit for repairing cardiac outflow tract according to claim 7, characterized in that, several incisions are set in the part which is around the leaflets, and also between the inner conduit and the external supporting conduit in order to make the suture and fixation smoother.

11. The valved conduit for repairing cardiac outflow tract according to claim 7, characterized in that, the upper conduit is upward extension part along the leaflets of the inner conduit, and the lower conduit with pericardial stentless valve is inferior arc descending part along the leaflets of the inner conduit and the external supporting conduit.

12. The valved conduit for repairing cardiac outflow tract according to claim 7, characterized in that, rigid supporting structure made of medical polymer materials or metal materials is set outside of the external supporting conduit.