Wound dressings, apparatus, and methods for controlling severe, life-threatening bleeding
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United States of America Patent
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Oct 26, 2010
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N/A
app pub date -
Oct 31, 2007
filing date -
Jun 14, 2001
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Abstract
A chitosan biomaterial is frozen in aqueous solution to form a frozen chitosan structure from which water is removed by a prescribed freeze-drying process to form a sponge-like chitosan structure having a thickness and a density. The sponge-like chitosan structure is compressed by application of heat and pressure to reduce the thickness and increase the density of the sponge-like chitosan structure to form a densified chitosan structure. The densified chitosan structure is further preconditioned by heating the densified chitosan structure according to prescribed conditions to form a wound dressing. The wound dressing possesses an adhesion strength and resistance to dissolution in high blood flow bleeding situations.
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