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US 9,308,298 B2Granted
Drug releasing medical catheters, tubes, and devices
AssigneeMedcatheters, Inc.
InventorJie Zhang
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to medical catheters, tubes, and other medical devices, systems, and methods. The catheter, tube, or other medical device is capable of releasing drugs for extended periods of time. Drugs can be loaded into the wall thereof with a loading solution. The drug in the wall of the device and in the loading solution can be in dynamic equilibrium, yielding stable and easy-to-manufacture products.
Claims11
A system of a loading solution and a medical catheter or tube capable of releasing drug for at least 24 hours when used in a patient, comprising:
- a medical catheter or tube comprising wall material having an outer wall surface and an inner wall surface;
- and
- a loading solution having a pH greater than about 7.0 in which at least a portion of the outer wall surface has been submersed for at least 15 days, said loading solution comprising a drug and at least 90% water by weight,
- wherein a first amount of the drug is in the loading solution and a second amount of the drug is diffused and absorbed into the outer wall surface, and
- wherein at least a part of the outer wall surface has a wall area with a wall concentration of the drug of at least 1 mg/cm2.
2 more elements
Dependencies are inferred from the claim text.