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    • 1. 发明授权
    • Multi-layer delivery system
    • 多层交付系统
    • US4957494A
    • 1990-09-18
    • US283631
    • 1988-12-13
    • Patrick S. L. WongFelix TheeuwesJames B. Eckenhoff
    • Patrick S. L. WongFelix TheeuwesJames B. Eckenhoff
    • A61K9/00A61M31/00
    • A61M31/002A61K9/0004
    • A dispenser for use in a fluid environment which is capable of delivery of plurality of discrete drug containing layers in any desired delivery pattern or profile. The dispenser comprises a rigid housing containing a plurality of drug layers which may be separated by drug-free layers. An outlet is provided at one end of the housing and a fluid actuated driving means is provided between the other end of the housing and the drug layers. The portion of the housing in proximity to the driving means has a controlled permeability to water whereby, upon immersion in a fluid environment the drug layers are driven towards the outlet. Various delivery patterns are possible by appropriate selection of the comparison and dimensions of the drug and drug-free layers.
    • 一种在流体环境中使用的分配器,其能够以任何期望的输送模式或轮廓递送多个离散的含药层。 分配器包括容纳多个药物层的刚性壳体,其可由无药物层分离。 出口设在壳体的一端,并且流体驱动的驱动装置设置在壳体的另一端和药物层之间。 壳体靠近驱动装置的部分对水具有受控的渗透性,因此当浸入流体环境中时,药物层朝着出口被驱动。 可以通过适当选择药物和无药物层的比较和尺寸来实现各种递送模式。