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    • 38. 发明授权
    • Laminated osmotic system for dispensing beneficial agent
    • 用于分配有益剂的层压渗透系统
    • US4014334A
    • 1977-03-29
    • US654194
    • 1976-02-02
    • Felix TheeuwesAtul D. Ayer
    • Felix TheeuwesAtul D. Ayer
    • A61F9/00A61K9/00A61M31/00
    • A61K9/0004A61F9/0017
    • An osmotic system for delivering a beneficial agent to an environment of use is disclosed. The system comprises a laminate surrounding a compartment and has a passageway through the laminate for releasing agent from the compartment. The laminate comprises at least two laminae; one consisting of a semipermeable, polymeric material that is permeable to the passage of an external fluid and maintains its physical and chemical integrity in the environment of use, and one consisting of a semipermeable polymeric material that is permeable to the passage of the fluid, substantially impermeable to the passage of agent and maintains its physical and chemical integrity in the presence of agent. The compartment comprises an active agent that is either soluble in the external fluid and exhibits an osmotic pressure gradient across the laminate against the fluid, or the agent has limited solubility in the fluid and it is mixed with an osmotically effective compound that is soluble in the fluid and exhibits an osmotic pressure gradient across the laminate against the fluid. In operation, agent is released from the system by fluid being imbibed through the laminate into the compartment at a rate controlled by the permeability of the laminate and the osmotic pressure gradient across the laminate producing a solution containing agent, or a solution of compound containing agent which solution in either operation is released through the passageway at a controlled and continuous rate over a prolonged period of time.
    • 公开了一种用于将有益剂递送到使用环境的渗透系统。 该系统包括围绕隔室的层压板,并具有通过层压板的通道,用于将隔离物释放。 层压体包括至少两层; 一种由可渗透外部流体通道并在使用环境中保持其物理和化学完整性的半透性聚合材料组成,并且由可渗透流体的半透性聚合物材料组成,基本上 通过试剂不渗透,并在试剂存在下保持其物理和化学完整性。 隔室包含可溶于外部流体的活性剂,并且表现出横跨该层压体的流体的渗透压梯度,或者该试剂在流体中具有有限的溶解度,并且与渗透性有效的化合物混合,该化合物可溶于 并且表现出跨过层压体抵抗流体的渗透压梯度。 在操作中,通过流体通过层压体被吸收到隔室中的剂量从层压体的渗透性控制的速率和穿过层压体的渗透压梯度产生包含溶液的试剂或含化合物的溶液 任何操作中的解决方案在长时间内以受控和连续的速率通过通道释放。