Long term drug delivery devices with polyurethane based polymers and their manufacture
First Claim
1. A drug delivery device for releasing one or more drugs at controlled rates for an extended period of time to produce local or systemic pharmacological effects, said drug delivery device having a reservoir comprising:
- i. at least one active ingredient optionally, ii. a polyurethane based polymer completely surrounding the reservoir; and
optionally, iii. at least one pharmaceutically acceptable carrier.
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Accused Products
Abstract
This invention is related to the use of polyurethane based polymer as a drug delivery device to deliver biologically active compounds at a constant rate for an extended period of time and methods of manufactures thereof. The device is very biocompatible and biostable, and is useful as an implant in patients (humans and animals) for the delivery of appropriate bioactive substances to tissues or organs. The drug delivery device for releasing one or more drugs at controlled rates for an extended period of time to produce local or systemic pharmacological effects comprises: 1. a reservoir, said reservoir comprising; 2. at least one active ingredient; and, optionally, 3. at least one pharmaceutically acceptable carrier; a polyurethane based polymer completely surrounding the reservoir.
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Citations
17 Claims
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1. A drug delivery device for releasing one or more drugs at controlled rates for an extended period of time to produce local or systemic pharmacological effects, said drug delivery device having a reservoir comprising:
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i. at least one active ingredient optionally, ii. a polyurethane based polymer completely surrounding the reservoir; and
optionally,iii. at least one pharmaceutically acceptable carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17)
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10. A process of manufacturing drug delivery devices made with thermoplastic polyurethanes, said process comprising:
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a) precision extrusion or injection molding step to produce a hollow tube made of thermoplastic polyurethane with two open ends with desired physical dimensions;
b) sealing one of the open ends of the hollow tube;
c) loading a reservoir containing a desired formulation containing an active ingredient and optionally, carriers or filling a reservoir with pre-fabricated pellets;
d) sealing the second open end of the hollow tube;
e) conditioning and priming of the drug delivery devices to achieve the desired delivery rates for the actives. - View Dependent Claims (11)
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12. A process of manufacturing drug delivery devices made with thermoset polyurethanes, said process comprising:
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a) precision reaction injection molding or spin casting a hollow tube having two open ends;
b) curing the hollow tube;
c) sealing one end of the hollow tube;
d) loading a reservoir containing a desired formulation containing actives and, optionally, carriers or filling a reservoir with pre-fabricated pellets;
e) sealing the second end of the hollow tube; and
f) conditioning and priming of the drug delivery devices to achieve the desired delivery rates for the actives. - View Dependent Claims (14, 15, 16)
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13. A process of manufacturing drug delivery devices made with thermoset polyurethanes, said process comprising:
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a) precision reaction injection molding or spin casting a hollow tube having one open end;
b) curing the hollow tube;
c) loading a reservoir containing a desired formulation containing actives and, optionally, carriers or filling a reservoir with pre-fabricated pellets;
d) sealing the open end of the hollow tube; and
e) conditioning and priming of the drug delivery devices to achieve the desired delivery rates for the actives.
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Specification