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US 4,727,868 AGranted
Anisotropic wound dressing
AssigneeThermedics Inc.
InventorsMichael Szycher, Jonathan L. Rolfe
Life of this patent
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AssigneeThermedics Inc.
InventorsMichael Szycher, Jonathan L. Rolfe
Estimating the term…
An anisotropic wound dressing comprised of a knitted reinforcing fabric which is sandwiched between a crosslinked aliphatic polyurethane. The wound dressing is fabricated by dipping the fabric into a polyurethane-forming coating solution to form a thin film which coates the fibres of the fabric and fills the interstices with a film or layer. The film which coats the fabric is cured by ultraviolet radiation and one side of the film is coated with pressure sensitive adhesive to form a wound dressing. In the most preferred embodiments, the knitted reinforcing fabric is an anisotropic fabric formed with a basic stitch construction to create equally spaced and sized hexagonal interstices. Because of the fabric reinforcement, the resulting oxygen permeable product can be made thin, and yet be anisotropic and strong. The resulting product does not wrinkle easily and holds its shape so it is also easily applied.
An anisotropic wound dressing comprising a polyurethane encapsulated fabric layer comprising:
An anisotropic wound dressing comprising a biocompatable polyurethane fabric layer comprising:
An anisotropic wound dressing comprising a biocompatable polyurethane encapsulated fabric layer comprising;
Dependencies are inferred from the claim text.