METHOD OF USING A HIGHLY POROUS SELF-COHERED WEB MATERIAL
The present invention is directed to methods of using implantable bioabsorbable non-woven self-cohered web materials having high degrees of porosity, particularly at anastomotic sites. The web materials can be formed into a variety of shapes and forms suitable for use as implantable medical devices or components thereof.
1 . A method of using a highly porous bioabsorbable web material as an external wrap at an anastomotic site, said method comprising:
providing an implantable article comprising 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 implantable article has a percent porosity greater than ninety in the absence of additional components; and
placing said porous web in contact with an anastomosis.
2 . The method of claim 1 further comprising:
securing said porous web.
3 . The method of claim 1 further comprising:
forming said porous web into a sleeve around said anastomosis.
4 . The method of claim 1 wherein said percent porosity is greater than ninety-one in the absence of additional components.
5 . The method of claim 1 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
6 . The method of claim 5 wherein the components comprise a block copolymer.
7 . The method of claim 1 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
8 . The method of claim 7 wherein at least one of the components is a block co-polymer.
9 . The method of claim 1 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).
10 . A method of using a highly porous bioabsorbable web material as an external wrap at an anastomotic site, said method comprising:
providing an implantable article comprising 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 a first semi-crystalline polymeric component covalently bonded to or blended with at least one additional semi-crystalline polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety in the absence of additional components; and
placing said porous web in contact with an anastomosis.
11 . The method of claim 10 further comprising:
securing said porous web.
12 . The method of claim 10 further comprising:
forming said porous web into a sleeve around said anastomosis.
13 . The method of claim 10 wherein said percent porosity is greater than ninety-one in the absence of additional components.
14 . The method of claim 10 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
15 . The method of claim 14 wherein the components comprise a block copolymer.
16 . The method of claim 10 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
17 . The method of claim 16 wherein at least one of the components is a block co-polymer.
18 . The method of claim 10 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).