Resorbable thin membranes
First Claim
1. A resorbable adhesion-inhibition membrane for inhibiting adhesions and scarring comprising a substantially uniform composition of a polymeric material, the polymeric material being capable of resorbing into a mammalian body within a period greater than 6 months and less than 24 months from an initial implantation of the adhesion-inhibition membrane into the mammalian body, the polymeric material having a biased molecular orientation in the membrane that is biased to at least one axis, with a viscosity property greater than about 1 g/dL to 3.5 g/dL and an anti-inflammatory characteristic comprising a first substantially-smooth non-porous surface, and the membrane having an opposing second surface and a thickness of about 0.001 mm to about 0.300 mm as measured between the first substantially-smooth non-porous surface and the opposing second surface.
2 Assignments
0 Petitions
Accused Products
Abstract
Resorbable lactide polymer thin membranes are disclosed. The thin membranes are constructed of polylactide resorbable polymers, which are engineered to be absorbed into the body relatively slowly over time in order to reduce potential negative side effects. The membranes are formed to have very thin thicknesses, for example, thicknesses between about 0.010 mm and about 0.300 mm. The membranes can be extruded from polylactide polymers having a relatively high viscosity property, can be preshaped with relatively thick portions, and can be stored in sterile packages.
26 Citations
30 Claims
- 1. A resorbable adhesion-inhibition membrane for inhibiting adhesions and scarring comprising a substantially uniform composition of a polymeric material, the polymeric material being capable of resorbing into a mammalian body within a period greater than 6 months and less than 24 months from an initial implantation of the adhesion-inhibition membrane into the mammalian body, the polymeric material having a biased molecular orientation in the membrane that is biased to at least one axis, with a viscosity property greater than about 1 g/dL to 3.5 g/dL and an anti-inflammatory characteristic comprising a first substantially-smooth non-porous surface, and the membrane having an opposing second surface and a thickness of about 0.001 mm to about 0.300 mm as measured between the first substantially-smooth non-porous surface and the opposing second surface.
- 22. A resorbable adhesion-inhibition membrane for inhibiting adhesions and scarring, comprising a substantially uniform composition of a polymeric material extruded into a membrane, the adhesion-inhibition membrane being capable of resorbing into a mammalian body within a period greater than 6 months to 24 months from an initial implantation of the membrane into the mammalian body, the membrane having an anti-inflammatory characteristic with a viscosity property greater than about 2.5 to 3.5 g/dL, the anti-inflammatory characteristic comprising a substantially-smooth anti-inflammatory surface and the membrane being about 0.001 mm to about 0.300 mm thick as measured between the substantially-smooth anti-inflammatory surface and a second opposing surface of the membrane.
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29. A resorbable anti-adhesive membrane comprising a substantially uniform composition of a polymeric material, the polymeric material being capable of resorbing into a mammalian body within a period greater than 6 months to 24 months from an initial implantation of the anti-adhesive membrane into the mammalian body, the polymeric material comprising a polylactide and having a biased molecular orientation in the membrane that is biased to at least one axis and a viscosity property of about 1 g/dL to 3.5 g/dL, the membrane having at least one substantially-smooth-anti-adhesive surface and being non-porous, the membrane also having a thickness of about 0.00 1 mm to about 0.300 mm as measured between the substantially-smooth anti-adhesive surface and an opposing surface of the membrane, wherein the membrane has a glass transition temperature and a thickness of the membrane increases by at least 5 times when the membrane is brought to its glass transition temperature.
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30. A resorbable anti-adhesive membrane comprising a substantially uniform composition of a polymeric material capable of resorbing into a mammalian body within a period greater than 6 months to 24 months from an initial implantation of the anti-adhesive membrane into the mammalian body, the polymeric material comprising a polylactide and having a biased molecular orientation in the membrane that is biased to at least one axis and a viscosity property that is of about 1.25 g/dL to 1.75 g/dL, the membrane having at least one substantially-smooth anti-adhesive surface and being non-porous, the membrane further having a thickness of about 0.00 1 mm to about 0.300 mm as measured between the substantially-smooth anti-adhesive surface and an opposing surface of the membrane, wherein the membrane has a glass transition temperature and a thickness of the membrane increases by at least 10 times when the membrane is brought to its glass transition temperature.
Specification