Composite self-cohered web materials

• US 7,655,288 B2
• Filed: 07/29/2005
• Issued: 02/02/2010
• Est. Priority Date: 07/29/2005
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: Gore Enterprise Holdings Incorporated (W.L. Gore and Associates)
• Inventors: Bauman, Ann M., Gabrys, Daniel S., White, Charles F., Flynn, Charles, Farnsworth, Ted R.
• Primary Examiner(s): Chriss; Jennifer A
• Application Number:
  US11/192,748
• Publication Number:
  US 20070026031A1
• Time in Patent Office: 1,649 Days
• Field of Search: None
• US Class Current: 428/36.4
• CPC Class Codes: A61B 17/07292 Reinforcements for staple line, e.g. pledgets
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61B 2017/00654 entirely comprised between the two sides of the opening
• CPC Class Codes: A61B 2017/00659 located only on one side of the opening
• CPC Class Codes: A61L 27/48 with macromolecular fillers
• CPC Class Codes: A61L 27/56 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 27/58 Materials at least partially resorbable by the body
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1362 Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
• CPC Class Codes: Y10T 428/1372 Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
• CPC Class Codes: Y10T 442/608 Including strand or fiber material which is of specific structural definition
• CPC Class Codes: Y10T 442/681 Spun-bonded nonwoven fabric
• CPC Class Codes: Y10T 442/686 Containing polymeric and natural strand or fiber materials
• CPC Class Codes: Y10T 442/688 Containing polymeric strand or fiber material
• CPC Class Codes: Y10T 442/69 Autogenously bonded nonwoven fabric

Abstract

The present invention is directed to implantable bioabsorbable non-woven self-cohered web materials having a high degree of porosity. The web materials are very supple and soft, while exhibiting proportionally increased mechanical strength in one or more directions. The web materials often possess a high degree of loft. The web materials can be formed into a variety of shapes and forms suitable for use as implantable medical devices or components thereof.

Claims

1. A medical device comprising a substantially rectangular, implantable, pledget material releasably attached along opposite sides of said rectangular pledqet material to a porous, bioabsorbable, non-woven web having a percent porosity greater than ninety to form a substantially tubular shape;

said porous web having melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise at least one semi-crystalline polymeric component covalently bonded to or blended with at least one amorphous polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state,

wherein said porous web is dimensioned to retain said pledqet material on a surgical stapler.

2. The medical device of claim 1 wherein the web has a percent porosity greater than ninety-one.

3. The medical device of claim 1 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.

4. The medical device of claim 3 wherein the components comprise a block copolymer.

5. The medical device of claim 1 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.

6. The medical device of claim 5 wherein at least one of the components is a block co-polymer.

7. The medical device of claim 1 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80°

C.).

8. The medical device of claim 1 wherein the pledget material is a bioabsorbable material.

9. The medical device of claim 8 wherein the bioabsorbable material is in the form of a melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise at least one semi-crystalline polymeric component covalently bonded to or blended with at least one amorphous polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state.

10. The medical device of claim 1 further comprising at least one perforation in said pledget material.