Patent Application

App. No. 13/249,978

Abstract

Claims (18)

1 . A device for adhesion prevention comprising a first absorbable nonwoven oxidized regenerated cellulose layer and a second absorbable woven oxidized regenerated cellulose layer attached to the first absorbable nonwoven oxidized regenerated cellulose layer.

2 . The device of claim 1 wherein the first nonwoven oxidized regenerated cellulose layer is an absorbable hemostat.

3 . The device of claim 1 wherein the second woven oxidized regenerated cellulose layer is an absorbable adhesion prevention barrier.

4 . The device of claim 1 wherein the first nonwoven oxidized regenerated cellulose layer is an absorbable hemostat and the second woven oxidized regenerated cellulose layer is an absorbable adhesion prevention barrier.

5 . The device of claim 2 wherein the absorbable hemostat has a carboxyl content of 18 to 21%.

6 . The device of claim 3 wherein the absorbable adhesion prevention barrier has a carboxyl content of 9% to 21%.

7 . The device of claim 4 wherein the absorbable hemostat has a carboxyl content of 18 to 21% and the absorbable adhesion prevention barrier has a carboxyl content of 9% to 21%.

8 . The device of claim 1 wherein the first absorbable nonwoven oxidized regenerated cellulose layer has a thickness of about 0.25 to 6 mm.

9 . The device of claim 1 wherein the first absorbable nonwoven oxidized regenerated cellulose layer has a basic weight of about 0.01 to 0.2 g/in 2 .

10 . The device of claim 1 wherein the first absorbable nonwoven oxidized regenerated cellulose layer has a weight percent from about 5 to 90 percent of a total weight of the device.

11 . A method of making a device for adhesion prevention comprising the steps of:

providing a regenerated cellulose woven fabric;

oxidizing the regenerated cellulose woven fabric with a solution of nitrogen dioxide in a perfluorocarbon solvent to achieve an oxidized regenerated cellulose woven fabric having a carboxyl content ranging from 9% to 21%;

providing an oxidized regenerated cellulose nonwoven fabric; and

attaching the oxidized regenerated cellulose nonwoven fabric to the oxidized regenerated cellulose woven fabric.

12 . The method of claim 11 wherein the oxidized regenerated cellulose woven fabric is an absorbable adhesion prevention barrier.

13 . The method of claim 11 wherein the oxidized regenerated cellulose nonwoven fabric is an absorbable hemostat.

14 . The method of claim 11 wherein the oxidized regenerated cellulose nonwoven fabric is an absorbable hemostat and the oxidized regenerated cellulose woven fabric is an absorbable adhesion prevention barrier.

Assignments (9)