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    • 3. 再颁专利
    • Method for preparing two-layer bicomposite collagen material for preventing post-operative adhesions
    • 制备双层双层复合胶原材料以防止手术后粘连的方法
    • USRE39172E1
    • 2006-07-11
    • US10761055
    • 1999-09-16
    • Yves BayonPhilippe GravagnaJean-Louis Tayot
    • Yves BayonPhilippe GravagnaJean-Louis Tayot
    • A61L15/16C12N11/02C12M5/06C12M5/08C08H1/00
    • A61L15/325A61L31/044
    • A bicomposite material based on collagen is prepared which has two closely bound layers and is biocompatible, non-toxic, hemostatic and biodegradable in less than a month, and can be used in surgery to achieve hemostasis and prevent post-surgical adhesion. To prepare the material, a solution of collagen or gelatin, which may contain glycerine and a hydrophilic additive such as polyethylene glycol or a polysaccharide, is poured onto an inert support to form a layer 30 μm to less than 100 μm thick. Then a polymeric porous fibrous layer is applied during gelling of the collagen or gelatin, and the resultant material is dried. The polymeric porous fibrous layer may be made of collagen or a polysaccharide, and have a density of not more than 75 mg/cm2, a pore size from 30 μm to 300 μm and a thickness of 0.2 cm to 1.5 cm.
    • 制备基于胶原的双组分材料,其具有两个紧密结合的层,并且在不到一个月的时间内具有生物相容性,无毒性,止血性和生物降解性,并且可用于手术以实现止血并防止手术后粘连。 为了制备材料,将可能含有甘油和亲水性添加剂如聚乙二醇或多糖的胶原蛋白或明胶溶液倒入惰性支持体中以形成30μm至小于100μm厚的层。 然后在胶原或明胶的胶凝过程中施加聚合物多孔纤维层,并将所得材料干燥。 聚合物多孔纤维层可以由胶原或多糖制成,并且具有不大于75mg / cm 2的密度,30μm至300μm的孔径和0.2cm的厚度 至1.5厘米。