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    • 6. 发明授权
    • Selective sorbent removal system using polycation activated substrates
    • 使用聚阳离子活化底物的选择性吸附剂去除系统
    • US5416198A
    • 1995-05-16
    • US013967
    • 1993-02-05
    • Christopher G. AndersonJames C. McRea
    • Christopher G. AndersonJames C. McRea
    • B01J20/32C07K17/00C08G69/10B01D61/00B01D15/08B01D63/02C07H1/00
    • C07K17/00B01J20/3204B01J20/321B01J20/3212B01J20/3219B01J20/3227B01J20/3272C08G69/10
    • A polycationic system for the removal of polyanions from a fluid medium is formed by, first, activating a biocompatible hydroxylated support with an organic sulfonyl chloride, such as p-toluene-sulfonyl chloride, in the presence of a dialkylamino pyridine activation catalyst, such as 4-dimethylamino-pyridine (DMAP). The activated support is then reacted with a polymer having a polyamide backbone with pendent alkyl amine groups, such as poly-L-lysine (PLL), to form C--N bonds between an activated carbon from the hydroxylated polymer and an amine group from the polymeric polyamide. Finally, any unreacted activated sites on the hydroxylated polymer are capped or removed with an effective amount of capping agent such as a mercapto (--SH), hydroxy (--OH) or amino (--NH.sub.2) containing compound which reacts with the unreacted activated sites. The pendent alkyl amines on the polyamide backbone exist, at the appropriate pH, as polycations. The polyanion, such as heparin, is removed from fluids, such as blood plasma and whole blood, by bringing these fluids in contact with the polycationic system. The polyanion is bound to the polycation system by ionic attraction. The polyanion can then be released from the polycation system by treatment with a basic solution, thereby allowing the system to be reused.
    • 通过首先在二烷基氨基吡啶活化催化剂存在下,用有机磺酰氯如对甲苯磺酰氯活化与生物相容的羟基化载体,形成用于从流体介质中除去聚阴离子的聚阳离子体系, 4-二甲基氨基 - 吡啶(DMAP)。 然后将活化的载体与具有聚酰胺主链的聚合物主链与悬浮的烷基胺基例如聚-L-赖氨酸(PLL)反应,以在羟基化聚合物的活性炭和来自聚合物聚酰胺的胺基之间形成CN键 。 最后,用羟基化聚合物上的任何未反应的活化部位用有效量的封端剂如巯基(-SH),羟基(-OH)或含氨基(-NH 2)的化合物进行封端或除去,该化合物与未反应的活化部位反应 。 聚酰胺主链上的侧链烷基胺在适当的pH下作为聚阳离子存在。 通过使这些流体与聚阳离子系统接触,聚阴离子如肝素从流体(例如血浆和全血)中除去。 聚阴离子通过离子吸附结合聚阳离子体系。 然后可以通过用碱性溶液处理从聚阳离子体系释放聚阴离子,从而允许系统重复使用。
    • 7. 发明授权
    • Plasma filter sorbent system for removal of components from blood
    • 用于从血液中去除组分的等离子体过滤器分离系统
    • US5211850A
    • 1993-05-18
    • US736405
    • 1991-07-26
    • Udipi ShettigarJames C. McRea
    • Udipi ShettigarJames C. McRea
    • A61M1/34B01D61/14B01D63/02
    • B01D61/145A61M1/3472A61M1/3475A61M1/3486B01D63/02B01D63/024B01D2313/40B01D2315/06Y10T436/255
    • A system and method of achieving both convective and diffusive transport of plasma across a membrane accompanied by the selective removal of plasma components using sorbents followed by reinfusion of the purified plasma in a blood circulation system is achieved by pumping blood through a filter comprising a bundle of "U" shaped hollow fibers immersed in a closed plasma chamber containing sorbents in an electrolyte solution. As blood flows through the entry arm, due to positive transmembrane pressure difference, plasma filtration into the plasma chamber occurs. The entering plasma causes an increase in the chamber pressure but does not exceed the pressure in the entry arm. The increase in chamber pressure exceeds the pressure in the exit arm of filter where the transmembrane pressure difference is negative and the direction of filtration reverses causing reverse filtration/reinfusion of plasma from the chamber into the blood in the exit arm. The phenomena of positive and reverse filtration from the hollow fiber filter establishes the circulation of plasma fluid in the plasma chamber. The plasma filtering through the entry arm, which corresponds to the arterial end of the system, passes through the plasma chamber solution containing the sorbents where plasma components get selectively depleted. The sorbents may be in any usable form which are not permeable to the filter. The purified plasma reenters the filter along the exit arm corresponding to the venous end where negative transmembrane pressure exists.
    • 通过使用吸附剂选择性除去血浆成分,随后在血液循环系统中再次输注纯化的血浆,实现等离子体跨越膜的对流和扩散输送的系统和方法,其通过将血液通过包含一束 “U”形中空纤维浸入电解质溶液中含有吸附剂的封闭等离子体室中。 当血液流过入口臂时,由于正跨膜压力差,等离子体过滤进入等离子体室。 进入的等离子体引起室压力的增加,但不超过入口臂中的压力。 腔室压力的增加超过了过滤器出口臂的压力,其中跨膜压力差为负,并且过滤反向的方向反转,导致血浆从腔室到出口臂中的血液的反向过滤/再输注。 中空纤维过滤器的正反过滤现象使等离子体腔中的等离子流体循环。 通过进入臂的等离子体过滤,其对应于系统的动脉端,通过含有吸附剂的等离子体室溶液,其中等离子体组分被选择性地耗尽。 吸附剂可以是不能过滤器渗透的任何可用形式。 纯化的血浆沿着对应于存在负跨膜压力的静脉端的出口臂重新进入过滤器。