Prosthesis for hernia repair

• US 20170209251A1
• Filed: 12/20/2016
• Published: 07/27/2017
• Est. Priority Date: 01/25/2016
• Status: Active Grant

• Current Assignee: Sofradim Production
• Original Assignee: Sofradim Production
• Inventors: Francois, Sebastien, Prost, Nicolas, Therin, Michel
• Granted Patent: US 10,646,321 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2002/0068 having a special mesh pattern
• CPC Class Codes: A61F 2002/009 for hindering or preventing attachment of biological tissue of bone tissue onto implantable joints A61F2002/30932
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0019 rectangular
• CPC Class Codes: A61F 2240/00 Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
• CPC Class Codes: A61F 2250/0051 differing in tissue ingrowth capacity, e.g. made from both ingrowth-promoting and ingrowth-preventing parts

Abstract

The present invention relates to a prosthesis (1) for hernia repair comprising a reinforcement layer (2), a first barrier layer (3) of anti-adhesion material covering at least a part of a surface of the reinforcement layer, and a second barrier layer of anti-adhesion material covering a remaining part of the surface of the reinforcement layer, the second barrier layer being formed of one or more flap member(s) (4).

Claims

1. A prosthesis for treating a hernia defect in an abdominal wall comprising:

at least one reinforcement layer, comprising a biocompatible porous material, said reinforcement layer including a first surface intended to face the abdominal wall and a second surface opposite said first surface, said reinforcement layer being delimited by an outer edge,

at least one first barrier layer, comprising a biocompatible anti-adhesion material, said first barrier layer including a first surface and a second surface opposite said first surface of the first barrier layer, the first surface of the first barrier layer covering substantially at least a central part of an area of the second surface of said reinforcement layer, the second surface of said first barrier layer being intended to face the abdominal cavity, said first barrier layer being delimited by an outer edge,

at least one second barrier layer, said second barrier layer being shaped and dimensioned so as to cover at least a part of the area of the second surface of said reinforcement layer that is not covered by the first barrier layer, said second barrier layer comprising one or more flap members, each flap member being formed of a piece of sheet of biocompatible anti-adhesion material, and having at least an outer edge attached to the second surface of the reinforcement layer and a free inner edge.

2. The prosthesis of claim 1, wherein the second barrier layer comprises at least a first flap member having the form of an annular band, an outer edge of said first flap member being substantially attached to the second surface of the reinforcement layer along the outer edge of said reinforcement layer.

3. The prosthesis of claim 2, wherein the second barrier layer further comprises at least a second flap member, the an outer edge of said second flap member being substantially attached to the second surface of the reinforcement layer along a line located between the outer edge of the reinforcement layer and the outer edge of the first barrier layer.

4. The prosthesis of claim 3, wherein said second flap member has the form of a second annular band, said first and second flap members being concentrically positioned one with respect to the other, so that the outer edge of said second flap member is substantially attached to the second surface of the reinforcement layer along a line substantially parallel to the outer edge of the reinforcement layer, said line being located between the outer edge of the reinforcement layer and the outer edge of the first barrier layer.

5. The prosthesis of claim 3, wherein the second barrier layer further comprises a third flap member having an outer edge, each of said second and third flap member having the form of a tape portion, the respective outer edges of said second and third flap members being substantially attached to the second surface of the reinforcement layer along line(s) located between the outer edge of the reinforcement layer and the outer edge of the first barrier layer, said line(s) being intended to be positioned in regards of the vicinity of the edges of the hernia defect.

6. The prosthesis of claim 2, wherein said second barrier layer consists in said first flap member.

7. The prosthesis of claim 2, wherein the outer edge of said first flap member is attached along the outer edge of said reinforcement layer in a continuous way.

8. The prosthesis of claim 2, wherein the outer edge of said first flap member is attached to the second surface of the reinforcement layer so as to define an attaching line which is offset towards a center of the prosthesis from about 0.5 to about 2 cm from the outer edge of said reinforcement layer.

9. The prosthesis of claim 1, wherein said first barrier layer covering the entire area of the second surface of the reinforcement layer, the outer edge of said one or more flap members is attached to the second surface of the reinforcement layer via an intermediate of the first barrier layer.

10. The prosthesis of claim 1, wherein the outer edge of said one or more flap members is attached to the second surface of the reinforcement layer by attaching means selected from the group comprising ultrasonic welding, hot compression welding, gluing and combinations thereof.

11. The prosthesis of claim 1, wherein an area resulting from the addition of each area of the one or more flap members is less than 120% of the part of the area of the second surface of said reinforcement layer that is not covered by the first barrier layer.

12. The prosthesis of claim 1, wherein said second barrier layer is provided with markings intended to indicate to the surgeon where to locate one or more fixing means for fixing the prosthesis to the abdominal wall.

13. The prosthesis according to claim 12, wherein said markings are colored spots located on a surface of said second barrier layer intended to face the abdominal cavity.

14. The prosthesis according to claim 13, wherein said markings are regularly spaced from one another along a perimeter of said second barrier layer.

15. The prosthesis of claim 1, wherein the free inner edge(s) of said one or more flap members is provided with one or more projecting tabs intended to help the surgeon lift said one or more flap members from said reinforcement layer.

16. The prosthesis of claim 1, wherein a smallest dimension of a shape of the piece of sheet of anti-adhesion material forming the one or more flap members ranges from about 1 cm to 4 cm.

17. The prosthesis of claim 1, wherein the one or more flap members forming the second barrier layer is provided on a surface facing the reinforcement layer or the first barrier layer with a tacky layer of biocompatible materials capable of sticking to said reinforcement layer or first barrier layer.

18. The prosthesis of claim 16, wherein the smallest dimension of the shape of the piece of sheet of anti-adhesion material forming the one or more flap members ranges from about 2 cm to 3 cm.

19. The prosthesis of claim 2, wherein the outer edge of said first flap member is attached to the second surface of the reinforcement layer so as to define an attaching line which is offset towards a center of the prosthesis from about 1 cm from the outer edge of said reinforcement layer.