Zwitterionic materials
    2.
    发明授权
    Zwitterionic materials 失效
    两性离子材料

    公开(公告)号:US5645883A

    公开(公告)日:1997-07-08

    申请号:US464677

    申请日:1995-06-07

    摘要: The present invention provides materials which comprise a surface having pendant zwitterionic groups Z comprising, as anion, a phosphate, sulphonate, carboxylate or phosphate-ester group or a phosphate ester group in which one or more of the ester oxygen atoms is replaced by --S--, --NH-- or by a valence bond and, as cation, an ammonium, phosphonium or sulphonium moiety, provided that where the anion is a phosphate-ester group or derivative thereof or sulphonate and the cation is a trialkyl quaternary ammonium group (the alkyl groups each containing from 1 to 4 carbon atoms) and the group linking the anion and cation moieties is an alkylene group, the alkylene group, contains at least 5, preferably at least 6, and more preferably at least 7, carbon atoms. The materials have improved biocompatibility for instance as evidenced by reduced protein deposition and reduced platelet activation.

    摘要翻译: PCT No.PCT / GB94 / 00178 Sec。 371日期:1995年6月7日 102(e)1995年6月7日PCT PCT 1994年1月28日PCT公布。 第WO94 / 16749号公报 日期1994年8月4日本发明提供了包含具有侧向两性离子基团Z的表面的材料,其包含作为阴离子的磷酸盐,磺酸盐,羧酸盐或磷酸酯基团或磷酸酯基团,其中一个或多个酯氧原子 由-S-,-NH-或价键取代,并且作为阳离子,铵,鏻或锍部分,其中阴离子是磷酸酯基团或其衍生物或磺酸盐并且阳离子是三烷基 季铵基(各自含有1至4个碳原子的烷基)和连接阴离子和阳离子部分的基团是亚烷基,亚烷基含有至少5个,优选至少6个,更优选至少7个 ,碳原子。 这些材料具有改善的生物相容性,例如通过减少的蛋白质沉积和减少的血小板活化来证明。

    Medico-surgical devices
    3.
    发明授权
    Medico-surgical devices 有权
    医疗器械

    公开(公告)号:US07258669B2

    公开(公告)日:2007-08-21

    申请号:US10259495

    申请日:2002-09-30

    IPC分类号: A61B8/14

    摘要: An embryo-transfer catheter has an extruded shaft with a gas-filled lumen that extends helically along the catheter to provide an ultrasound marker. The catheter has a side opening close to a closed rounded patient end. The catheter could be completely transparent to x-rays or the plastics from which it is formed could incorporate an x-ray opaque filler, such as barium sulphate.

    摘要翻译: 胚胎移植导管具有挤出轴,其具有气体填充内腔,其沿着导管螺旋地延伸以提供超声波标记。 导管具有靠近闭合的圆形患者端的侧开口。 导管可以对X射线完全透明,或者从其形成的塑料可以包含x射线不透明填料,例如硫酸钡。

    Materials and their use in the preparation of biocompatible surfaces
    4.
    发明授权
    Materials and their use in the preparation of biocompatible surfaces 失效
    材料及其在生物相容性表面的制备中的应用

    公开(公告)号:US5739237A

    公开(公告)日:1998-04-14

    申请号:US682536

    申请日:1996-07-29

    摘要: New materials having improved biocompatibility have novel zwitterionic groups at the surface. The zwitterion is characterized by having at least one monovalent substituent at the atom carrying the cationic charge which is an aryl group. Preferably the atom carries at least two, and preferably three such aryl, usually phenyl, groups. The cationic group is preferably a triphenylphosphonium. Treatment of surfaces to provide pendant zwitterionic groups of the specified type have reduced platelet activation, whilst they do not appear to reduce platelet adhesion. The invention has utility in the field of blood contacting device, especially devices for implantation, such as vascular grafts.

    摘要翻译: PCT No.PCT / GB95 / 00161 Sec。 371日期:1996年7月29日 102(e)日期1996年7月29日PCT 1995年1月27日PCT PCT。 WO95 / 20407 PCT出版物 日期1995年8月3日具有改善的生物相容性的新材料在表面具有新的两性离子基团。 两性离子的特征在于在携带作为芳基的阳离子电荷的原子上具有至少一个一价取代基。 优选地,原子携带至少两个,优选三个这样的芳基,通常为苯基。 阳离子基团优选为三苯基鏻。 处理表面以提供指定类型的侧基两性离子基团具有降低的血小板活化,而它们似乎不降低血小板粘附。 本发明在血液接触装置领域具有实用性,尤其是用于植入的装置,例如血管移植物。