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    • 27. 发明授权
    • Delayed onset transdermal delivery device
    • 延迟发作透皮递送装置
    • US5284660A
    • 1994-02-08
    • US933423
    • 1992-08-21
    • Eun Soo LeeFelix TheeuwesPatrick S. L. WongSu Il YumRobert M. GaleAlejandro Zaffaroni
    • Eun Soo LeeFelix TheeuwesPatrick S. L. WongSu Il YumRobert M. GaleAlejandro Zaffaroni
    • A61K9/00A61K9/22A61K9/70A61F13/00
    • A61K9/7084A61K9/7069A61K9/7092
    • 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 predetermined temporal patterns 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药剂储存器之间的延迟膜,该膜优选不含未溶解的试剂和/或最初不能渗透到试剂中,然后变得可渗透。 可以提供由一种或多种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。
    • 30. 发明授权
    • Osmotic releasing system for administering ophthalmic drug to eye of
animal
    • 渗透性释放系统,用于将眼药物用于动物眼
    • US4135514A
    • 1979-01-23
    • US775989
    • 1977-03-09
    • Alejandro ZaffaroniAlan S. MichaelsFelix Theeuwes
    • Alejandro ZaffaroniAlan S. MichaelsFelix Theeuwes
    • A61F6/14A61F9/00A61K9/00A61M31/00
    • A61K9/0051A61F6/14A61F6/144A61F9/0017A61K9/0004A61K9/0039
    • An osmotic device for releasing a useful agent at different release rate patterns from the device in a selected environment is disclosed. The device is comprised of a wall surrounding and forming a compartment as a means for containing a useful agent and having a passageway for releasing the agent. The wall is comprised in at least a part of a material permeable to an external fluid and impermeable to the agent. A layer of a pattern rate controlling material that erodes in a selected environment for changing the release rate pattern of the device is carried on the semipermeable wall distant from the compartment. The agent is soluble in the fluid and exhibits an osmotic pressure gradient across the semipermeable wall against the fluid, or the agent has limited solubility and is admixed with an osmotically effective solute soluble in the fluid that exhibits an osmotic pressure gradient across the semipermeable wall against the fluid. In operation, agent is released from the device at different release rate patterns by the pattern rate controlling material eroding at a controlled rate to increase the amount of fluid available to the semipermeable wall for imbibition, which fluid is imbibed through the wall into the compartment producing a solution of the soluble agent or a solution of the osmotically effective solute containing the agent which is released through the passageway to the exterior of the device at a rate controlled by the permeability of the semipermeable wall and the osmotic pressure gradient across the wall of the device.
    • 公开了一种用于在所选环境中从设备以不同释放速率模式释放有用试剂的渗透装置。 该装置包括围绕并形成隔室的壁,作为用于容纳有用试剂并具有用于释放试剂的通道的装置。 所述壁包括在对外部流体可渗透并且对所述试剂不可渗透的材料的至少一部分中。 在选择的环境中侵蚀以改变装置的释放速率图案的图案速率控制材料层被承载在远离隔室的半透壁上。 该试剂可溶于流体并且表现出跨越半透性壁抵抗流体的渗透压梯度,或者该试剂具有有限的溶解度,并且与可溶于流体的渗透压有效溶质混合,该溶质表现出穿过半透壁的渗透压梯度,抵抗 流体。 在操作中,通过模式速率控制材料以受控的速率以不同的释放速率模式从设备释放试剂,以增加半渗透壁可用于吸入的流体的量,该流体通过壁被吸入隔室产生 将可溶性试剂或含有该试剂的渗透有效溶质的溶液的溶液以通过该通道释放的渗透压力通过半透壁的渗透率和穿过该壁的渗透压梯度 设备。