Man-made skin composed of two layers: collagen and a poly-alpha-amino
acid
    3.
    发明授权
    Man-made skin composed of two layers: collagen and a poly-alpha-amino acid 失效
    人造皮肤由两层组成:胶原蛋白和聚-α-氨基酸

    公开(公告)号:US4642118A

    公开(公告)日:1987-02-10

    申请号:US741835

    申请日:1985-06-06

    CPC分类号: A61L27/60 A61L27/34

    摘要: This invention concerns a double-layered man-made skin which is prepared by laminating a collagen sponge sheet and a poly-.alpha.-amino acid membrane that has a good affinity with tissue cells and an appropriate permeability for moisture. When the man-made skin is applied on burns, cuts or wounds, the fibroblasts proliferate in the collagen sponge sheet forming a three-dimensional structure, while the epidermal cells proliferate in the region between the poly-.alpha.-amino acid membrane and a collagen sponge sheet. The poly-.alpha.-amino acid membrane plays a role in protecting affected part and in providing an optimum condition for the proliferation of fibroblasts and epidermal cells, and then it falls off as the epidermis completely regenerates. On the other hand, the collagen sponge sheet assimilates in the living tissue after having played a general role of the dermis.

    摘要翻译: 本发明涉及一种双层人造皮肤,其通过层叠胶原海绵片和与组织细胞具有良好亲和性并具有适当的渗透性的聚-α-氨基酸膜制备。 当人造皮肤应用于烧伤,切口或伤口时,成纤维细胞在形成三维结构的胶原海绵片中增殖,而表皮细胞在聚-α-氨基酸膜和胶原之间的区域中增殖 海绵片。 聚-α-氨基酸膜在保护受影响部位和为成纤维细胞和表皮细胞增殖提供最佳条件方面发挥作用,随着表皮完全再生,其脱落。 另一方面,在发挥真皮的一般作用后,胶原蛋白海绵片在活组织中被吸收。

    Wound covering
    5.
    发明授权
    Wound covering 失效
    伤口覆盖

    公开(公告)号:US5035893A

    公开(公告)日:1991-07-30

    申请号:US440197

    申请日:1989-11-22

    摘要: The present invention relates to a wound covering comprising a sheet of biopolymeric material and a film of a polyurethane resin obtained by reacting a diisocyanate and a random copolymer of tetrahydrofuran and ethylene oxide to produce a urethane prepolymer, and extending the molecular chain of said prepolymer by using a chain extender, said random copolymer containing 20 to 80% by weight of the ethylene oxide unit in the molecular chain thereof and having a number-average molecular weight of 800 to 3000.The wound covering of the present invention is excellent in adhesion flexibility, durability, easy handling, preservation, sterile filtration, compatibility with cell, blood starching, water-vapor permeability. Therefore, it is quite suitable for practical use.

    摘要翻译: 本发明涉及包含生物聚合物材料片和通过二异氰酸酯与四氢呋喃和环氧乙烷的无规共聚物反应得到的聚氨酯树脂的薄膜以产生氨基甲酸酯预聚物并将所述预聚物的分子链延伸通过 使用扩链剂,所述无规共聚物含有20〜80重量%的分子链中的环氧乙烷单元,数均分子量为800〜3000。本发明的伤口覆盖物具有优异的粘合柔韧性 ,耐久性,易于处理,保存,无菌过滤,与细胞相容性,血液淀粉,水蒸气渗透性。 因此,适用于实际应用。