PROSTHETIC DEVICE HAVING DIAGONAL YARNS AND METHOD OF MANUFACTURING THE SAME

• US 20110224703A1
• Filed: 04/25/2011
• Published: 09/15/2011
• Est. Priority Date: 12/15/2008
• Status: Active Grant

• Current Assignee: Allergan Incorporated (Abbvie Incorporated)
• Original Assignee: Allergan Incorporated (Abbvie Incorporated)
• Inventors: Mortarino, Enrico
• Granted Patent: US 9,204,954 B2
• Time in Patent Office: Days
• US Class Current: 606/151
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61F 2002/0068 having a special mesh pattern
• CPC Class Codes: A61L 27/3604 characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
• CPC Class Codes: D04B 1/22 specially adapted for knitting goods of particular configuration
• CPC Class Codes: D04B 21/08 characterised by thread material
• CPC Class Codes: D04B 21/12 characterised by thread material
• CPC Class Codes: D10B 2509/08 Hernia repair mesh

Abstract

A knitted scaffold comprising at least two silk yarns in a knit direction and a yarn member diagonal to the knit direction to thereby provide a knitted fabric or mesh for surgical use that can retain its shape and/or resist collapse when opposing forces are applied at an angle from the knit direction. The knitted scaffold may include at least two yarns laid in a knit direction and engaging each other to define a plurality of nodes. The at least two yarns can include a first yarn and a second yarn extending between and forming loops about two nodes. The second yarn has a higher tension at the two nodes than the first yarn. The second yarn substantially prevents the first yarn from moving at the two nodes and substantially prevents the knitted mesh from unraveling at the nodes.

Claims

1. A knitted scaffold comprising at least two silk yarns in a knit direction and a yarn member diagonal to the knit direction.

2. The knitted scaffold according to claim 1, wherein the diagonal yarn member is at a 45 degree to 60 degree angle from the knit direction.

3. The knitted scaffold according to claim 1, wherein the diagonal yarn member is in a single plane.

4. The knitted scaffold according to claim 1, wherein the diagonal yarn member is in two planes.

5. The knitted scaffold according to claim 1, wherein the at least two yarns laid in a knit direction engage each other to define a plurality of nodes, the at least two yarns including a first yarn and a second yarn extending between two nodes, the second yarn having a higher tension at the two nodes than the first yarn, the second yarn substantially preventing the first yarn from moving at the two nodes and substantially preventing the knitted scaffold from unraveling at the nodes.

6. The knitted scaffold according to claim 1, wherein the first yarn and the second yarn are formed from different materials.

7. The knitted scaffold according to claim 1, wherein the first yarn and the second yarn have different diameters.

8. The knitted scaffold according to claim 1, wherein the first yarn and the second yarn have different elastic properties.

9. A method of making a knitted silk scaffold having at least two yarns in a knit direction that resists collapse when opposing forces are applied at an angle from the knit direction, the method comprising:

placing a yarn member diagonally to the knit direction of the scaffold.

10. The method according to claim 9, further comprising placing the yarn member diagonally at a 45 degree to 60 degree angle to the knit direction.

11. The method according to claim 9, wherein the scaffold comprises at least two yarns laid in a knit direction engage each other to define a plurality of nodes, the at least two yarns including a first yarn and a second yarn extending between two nodes, the second yarn having a higher tension at the two nodes than the first yarn, the second yarn substantially preventing the first yarn from moving at the two nodes and substantially preventing the knitted scaffold from unraveling at the nodes.

12. The method according to claim 9, further comprising placing the yarn member diagonally in a single plane.

13. The method according to claim 9, further comprising placing the yarn member diagonally in two planes.

14. The method according to claim 9, further comprising knitting the scaffold on a single needle bed machine.

15. The method according to claim 9, further comprising knitting the scaffold on a double needle bed machine.

16. The method according to claim 9, further comprising knitting the scaffold using two needle bars.

17. The method according to claim 9, further comprising knitting the scaffold using three needle bars.

18. A method of using a knitted scaffold in surgery, the method comprising:

implanting in a patient a knitted scaffold comprised of at least two silk yarns in a knit direction and having a yarn member diagonal to the knit direction.

19. The method according to claim 18, wherein the diagonal yarn member is at a 45 degree to 60 degree angle from the knit direction.

20. The method according to claim 18, wherein the implanted knitted scaffold having the diagonal yarn member provides load bearing support.