Knitted surgical mesh

• US 6,287,316 B1
• Filed: 03/26/1999
• Issued: 09/11/2001
• Est. Priority Date: 03/26/1999
• Status: Expired due to Term

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Agarwal, Vishvaroop, Dougherty, Robert
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): King, Anthony S.
• Application Number:
  US09/277,671
• Time in Patent Office: 900 Days
• Field of Search: 661/95, 128/336, 128/334, 606/151
• US Class Current: 606/151
• 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: D04B 21/12 characterised by thread material
• CPC Class Codes: D10B 2509/08 Hernia repair mesh

Abstract

A knitted surgical mesh formed from a yarn. The knitted mesh has from 18 to 24 courses per inch and from 5 12 to 16 wales per inch, a flexibility of from 400-950 mg-cm/cm, a burst strength greater than 175 pounds per square inch, and a pore size percentage greater than 37%.

Claims

1. A knitted surgical mesh comprised of a knitted yarn, the knitted mesh having from 19 to about 24 courses per inch and from 12 to 16 wales per inch two bar warp knit construction with a bar pattern set-up of back bar 1/0, 2/3;

front bar 1/2, 1/0, wherein the mesh has a burst strength from 210 to 250 pounds per square inch.

2. The surgical mesh of claim 1, wherein the yarn is a polypropylene yarn.

3. The surgical mesh of claim 2, wherein the yarn is a monofilament polypropylene yarn.

4. The surgical mesh of claim 3, wherein the yarn has a denier of from 30 to 300.

5. The knitted surgical mesh of claim 1, wherein the pore size percentage mesh is from about 35% to 60%.

6. The knitted surgical mesh of claim 5, wherein the pore size percentage of the mesh is from about 45% to about 50%.

7. The knitted surgical mesh of claim 1, wherein the mesh has a thickness of from 18 to 25 mils.

8. The knitted surgical mesh of claim 7, wherein the thickness of the mesh is from 18 to 21 mils.

9. The surgical mesh of claim 1, wherein the yarn is a multifilament yarn.

10. The surgical mesh of claim 9, wherein the yarn is made from polypropylene fiber.

11. The surgical mesh of claim 1, wherein the yarn is a monofilament yarn.

12. The surgical mesh of claim 11, wherein the yarn is made from polypropylene fiber.

13. The surgical mesh of claim 1, wherein the mesh includes a key-hole shaped opening within an interior region of the mesh.

14. The surgical mesh of claim 1, wherein the yarn is a nonabsorbable yarn made from a material selected from the group consisting of cotton, linen, silk, polyamides, polyesters, fluoropolymers, polyolefins and combinations thereof.

15. The surgical mesh of claim 1, wherein the yarn is an absorbable yarn made from a material selected from the group consisting of homopolymers and copolymers of lactide (which includes lactic acid d-, l- and meso lactide), glycolide (including glycolic acid), ε

-caprolactone, p-dioxanone (1,4-dioxan-2-one), trimethylene carbonate (1,3-dioxan-2-one), alkyl derivatives of trimethylene carbonate, δ

-valerolactone, β

-butyrolactone, γ

-butyrolactone, ε

-decalactone, hydroxybutyrate, hydroxyvalerate, 1,4-dioxepan-2-one (including its dimer 1,5,8,12-tetraoxacyclotetradecane-7,14-dione), 1,5-dioxepan-2-one, 6,6-dimethyl-1,4-dioxan-2-one and polymer blends thereof.