Osmotic delivery system, osmotic delivery system semipermeable body assembly, and method for controlling delivery rate of beneficial agents from osmotic delivery systems
First Claim
1. An osmotic delivery system plug for controlling a delivery rate of a beneficial agent in an osmotic delivery system comprising:
- a semipermeable body at least partially positionable in an opening in an enclosure of an osmotic delivery system, the semipermeable body including a cone-shaped, liquid contact surface for contacting a liquid outside of the osmotic delivery system; and
a hollow interior portion having a size selected to obtain a predetermined liquid permeation rate through the semipermeable body, the liquid permeation rate for controlling a delivery rate of a beneficial agent in the osmotic delivery system.
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Accused Products
Abstract
Osmotic delivery system semipermeable body assemblies that control the delivery rate of a beneficial agent from an osmotic delivery system incorporating one of the semipermeable body assemblies are provided. A semipermeable body assembly or plug includes a semipermeable body which is positionable in an opening of an osmotic delivery system. The semipermeable body has a hollow interior portion having a size selected to obtain a predetermined liquid permeation rate through the semipermeable body. Because the beneficial agent in the osmotic delivery system is delivered at substantially the same rate, the osmotic agent imbibes liquid which has permeated through the plug from a surrounding environment, and the liquid permeation rate through the plug controls the delivery rate of the beneficial agent from the osmotic delivery system. The liquid permeation rate through a semipermeable body may be varied to control the delivery rate of beneficial agent from an osmotic delivery system by changing the thickness of the semipermeable body or by changing an amount of surface area of the semipermeable body that is exposed to liquid when the osmotic delivery system is located in a liquid environment of use.
139 Citations
32 Claims
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1. An osmotic delivery system plug for controlling a delivery rate of a beneficial agent in an osmotic delivery system comprising:
a semipermeable body at least partially positionable in an opening in an enclosure of an osmotic delivery system, the semipermeable body including a cone-shaped, liquid contact surface for contacting a liquid outside of the osmotic delivery system; and
a hollow interior portion having a size selected to obtain a predetermined liquid permeation rate through the semipermeable body, the liquid permeation rate for controlling a delivery rate of a beneficial agent in the osmotic delivery system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An osmotic delivery system comprising:
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an enclosure having an opening and a delivery port, the enclosure having an interior holding a liquid swellable osmotic agent and a beneficial agent, the liquid swellable osmotic agent for imbibing liquid from a surrounding environment and causing a delivery rate of said beneficial agent from the enclosure;
a plug having a semipermeable body at least partially positioned in the opening, the semipermeable body including a cone-shaped, liquid contact surface for contacting a liquid outside of the osmotic delivery system; and
a hollow interior portion having a size selected to obtain a predetermined liquid permeation rate through the semipermeable body, the liquid permeation rate for controlling a delivery rate of a beneficial agent in the osmotic delivery system. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method of controlling a delivery rate of a beneficial agent from an osmotic drug delivery system that includes an enclosure having an interior holding a liquid swellable osmotic agent and a beneficial agent, the osmotic drug delivery system also including a plug having a semipermeable body at least partially positioned in an opening of the enclosure, the semipermeable body including a hollow interior portion, the method comprising:
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determining a desired delivery rate of the beneficial agent;
selecting a plug having a cone-shaped, liquid contact surface for contacting a liquid outside of the osmotic delivery system and having a hollow interior portion sized to obtain a predetermined liquid permeation rate through the semipermeable body corresponding to the desired delivery rate of the beneficial agent;
positioning the plug at least partially within the opening of the enclosure; and
locating the osmotic drug delivery system in an environment of use. - View Dependent Claims (26)
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27. An osmotic delivery system comprising:
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an enclosure having an opening and a delivery port, the enclosure having an interior holding a liquid swellable osmotic agent and a beneficial agent, the liquid swellable osmotic agent for imbibing liquid from a surrounding environment and causing a delivery rate of the beneficial agent from the enclosure; and
a plug having a semipermeable body, the plug being at least partially positioned in the opening, the semipermeable body having an exposure surface that is immediately exposed to liquids when the osmotic delivery system is located in a liquid environment of use, the exposure surface including a conical surface. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification