Coated bioabsorbable beads for wound treatment
AssigneeJohnson & Johnson Medical, Inc.
InventorsJames McGregor, Paul W. Watt
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Abstract
The invention provides a material for use in a wound dressing or wound implant, the material comprising a plurality of beads, wherein each bead comprises a porous core of a first bioabsorbable material and a substantially non-porous layer of a second bioabsorbable material around the core. The porous core is preferably a sponge formed by freeze-drying a liquid suspension of the first bioabsorbable material. The preferred diameter of the beads is 0.1-4.0 mm, and the beads are preferably dispersed in a liquid or solid matrix. The invention also provides a method of making beads for use in the materials of the invention.
Claims10
A material for use in a wound dressing or a wound implant, the material comprising a plurality of beads, wherein each bead comprises a porous core of a first bioabsorbable material and a substantially non-porous layer of a second bioabsorbable material around said core.
A method of making bioabsorbable beads for use in wound dressings or implants, the method comprising:
- providing a dispersion of a first bioabsorbable material in a liquid solvent;
- generating droplets of said dispersion;
- freezing said droplets to form frozen droplets;
- freeze-drying or solvent-drying the frozen droplets to form discrete porous cores of said first bioabsorbable material;
- and
- coating said porous cores with a substantially non-porous layer of a second bioabsorbable material.
Dependencies are inferred from the claim text.