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    • 43. 发明授权
    • Delayed onset transdermal delivery device
    • 延迟发作透皮递送装置
    • US5071656A
    • 1991-12-10
    • US271207
    • 1988-11-14
    • Eun Soo LeeFelix TheeuwesPatrick S. L. WongSu Il YumAlejandro Zaffaroni
    • Eun Soo LeeFelix TheeuwesPatrick S. L. WongSu Il YumAlejandro Zaffaroni
    • A61K9/70A61K31/21
    • A61K9/7069A61K31/21A61K9/7084A61K9/7092
    • A diffusional drug delivery device is described which can provide for delayed onset of therapeutic effect and for delivery of the therapeutic agent in predetermined temporal patterns at optimum rates. Delay means are provided between the agent reservoir and the surface through which the agent is released by diffusion to delay the release of agent at a therapeutic rate for predetermined times after application. Suitable means include a delay membrane disposed between the releasing surface and the agent reservoir which membrane is preferably free of undissolved agent and/or is initially impermeable to the agent and thereafter becomes permeable. One or more agent chambers defined by one or more of such membranes may be provided, whereby agents are released in a predetermined temporal pattern at optimal release rates. Delayed permeability enables programmed washout periods to be obtained from the sequential and concurrent application of devices for the administration of drugs, such as nitrates, to which patients may develop a tolerance on continuous administration over extended time periods.
    • 描述了扩散药物递送装置,其可以提供治疗效果的延迟开始和以最佳速率以预定时间模式递送治疗剂。 在药剂储存器和通过扩散释放药剂的表面之间提供延迟装置,以在施用后以治疗速率延迟药剂释放预定时间。 合适的方法包括设置在释放表面和试剂储存器之间的延迟膜,该膜优选不含未溶解的试剂和/或最初对试剂不渗透,然后变为可渗透的。 可以提供由一个或多个这样的膜限定的一个或多个试剂室,由此以最佳释放速率以预定的时间模式释放试剂。 延迟渗透性使得能够从连续和同时使用用于施用诸如硝酸盐的药物的装置获得程序性洗脱期,患者可以在延长的时间段内持续施用耐受性。
    • 45. 发明授权
    • Delayed release osmotically driven fluid dispenser
    • 延迟释放渗透驱动的流体分配器
    • US4976966A
    • 1990-12-11
    • US291725
    • 1988-12-29
    • Felix TheeuwesPatrick S. L. Wong
    • Felix TheeuwesPatrick S. L. Wong
    • A61K9/00A61K9/22
    • A61K9/0004
    • An osmotically driven pump is provided that is capable of being miniaturized to a size suited for swallowing or implanting in an animal. The pump may be used to administer a drug in fluid form after an initial activation period during which substantially no drug is administered. The basic components of the pump are a shaped semipermeable membrane that encapsulates an osmotically effective solute and preferably a drug or other beneficial agent and a discharge port through which the drug or other beneficial agent is dispensed. A semipermeable or microporous outer cover surrounds the semipermeable membrane and seals it from an external aqueous environment. A water-swellable composition is operatively positioned between the end of the semipermeable membrane and the outer cover. Preferably, a water wicking layer at least partially surrounds the semipermeable membrane and is also sealed within the outer cover. In operation, the pump is placed in an aqueous environment. Water from the environment passes through the semipermeable/microporous portion of the outer cover into the water-swellable composition. The water-swellable composition absorbs water, expands, and in piston-like fashion displaces the outer cover, thereby exposing the semipermeable membrane to the aqueous environment and activating the osmotic pump. The time required for the water-swellable composition to absorb water, expand and displace the outer cover provides an initial activation period during which substantially no drug is delivered by the pump.
    • 提供了一种渗透驱动的泵,其能够被小型化成适合于在动物中吞咽或植入的尺寸。 在基本上不施用药物的初始活化期之后,泵可以用于以流体形式施用药物。 泵的基本组分是封装渗透有效溶质,优选药物或其它有益剂的成形半透膜和药物或其它有益剂通过其分配的排出口。 半透膜或微孔外壳围绕半透膜并将其与外部水性环境密封。 可水膨胀组合物可操作地定位在半透膜的端部和外覆盖件之间。 优选地,吸水层至少部分地包围半透膜并且也被密封在外盖内。 在操作中,将泵放置在水性环境中。 来自环境的水通过外盖的半透/微孔部分进入水溶胀性组合物。 水溶胀性组合物吸收水,膨胀,并且以活塞样的方式取代外盖,从而将半透膜暴露于水性环境并激活渗透泵。 水溶胀性组合物吸收水,膨胀和置换外盖所需的时间提供初始激活期,在此期间基本上没有药物由泵输送。