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    • 7. 发明授权
    • Biodegradable bursting release system
    • 可生物降解爆破释放系统
    • US5429822A
    • 1995-07-04
    • US852372
    • 1992-03-13
    • Joseph D. GresserDonald L. WiseAbdul G. JimohDon C. AugensteinDean O. KuetheDebra J. Trantolo
    • Joseph D. GresserDonald L. WiseAbdul G. JimohDon C. AugensteinDean O. KuetheDebra J. Trantolo
    • A61K9/00A61F2/00
    • A61K9/0024
    • A biodegradable polymeric multiphasic release system of one or more biodegradable bursting units capable of delivering biologically active substances in a burst or pulse at predetermined times and a method for constructing those units is disclosed. The individual bursting units of the system may take the form of a biodegradable, membrane coated capsule surrounding a core material which may include an active agent. The membrane ruptures after a predetermined time upon exposure to water or bodily, or other aqueous environmental fluids. The bursting units may be used in any situation in which a controlled pulsed release of an active substance is desired. The predetermined time release of each bursting unit is controlled by the composition of the core material, the initial radius and wall thickness of the membrane and the porosity of the membrane. The core material may also contain a chemical composition which generates gas as fluid is drawn into the bursting unit thus adding an additional design variable for predetermining bursts.
    • 公开了一种可生物降解的聚合多相释放系统,该系统能够在预定时间内以突发或脉冲递送生物活性物质,以及用于构建这些单元的方法。 系统的各个破裂单元可以采用围绕可以包含活性剂的核心材料的可生物降解的膜包膜的形式。 暴露于水或身体或其他含水环境液体之后,膜会在预定时间后破裂。 爆破单元可以用于需要活性物质的受控脉冲释放的任何情况。 每个破裂单元的预定时间释放由芯材料的组成,膜的初始半径和壁厚度以及膜的孔隙度来控制。 核心材料还可以包含当流体被拉入破裂单元时产生气体的化学组成,从而为预先确定的脉冲串添加额外的设计变量。