Drug releasing coatings for medical devices
First Claim
1. A balloon catheter for delivering a therapeutic agent to a target site of a blood vessel, the balloon catheter comprising:
- a coating layer overlying an exterior surface of a balloon, wherein;
the coating layer comprises an initial drug load of a hydrophobic therapeutic agent, and a combination of a water-soluble first additive and a water-soluble second additive;
the hydrophobic therapeutic agent is selected from the group consisting of paclitaxel, rapamycin, and combinations thereof;
the water-soluble first additive is selected from the group consisting of PEG sorbitan monolaurates, PEG sorbitan monooleates, and combinations thereof;
the water-soluble second additive is selected from the group consisting of sorbitol, sorbitan, xylitol, gluconolactone, and combinations thereof.
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Accused Products
Abstract
The invention relates to a medical device for delivering a therapeutic agent to a tissue. The medical device has a layer overlying the exterior surface of the medical device. The layer contains a therapeutic agent, an antioxidant, and an additive. In certain embodiments, the additive has a hydrophilic part and a drug affinity part, wherein the drug affinity part is at least one of a hydrophobic part, a part that has an affinity to the therapeutic agent by hydrogen bonding, and a part that has an affinity to the therapeutic agent by van der Waals interactions. In some embodiments, the additive is a liquid. In other embodiments, the additive is at least one of a surfactant and a chemical compound, and the chemical compound has one or more hydroxyl, amino, carbonyl, carboxyl, acid, amide or ester groups.
493 Citations
18 Claims
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1. A balloon catheter for delivering a therapeutic agent to a target site of a blood vessel, the balloon catheter comprising:
a coating layer overlying an exterior surface of a balloon, wherein; the coating layer comprises an initial drug load of a hydrophobic therapeutic agent, and a combination of a water-soluble first additive and a water-soluble second additive; the hydrophobic therapeutic agent is selected from the group consisting of paclitaxel, rapamycin, and combinations thereof; the water-soluble first additive is selected from the group consisting of PEG sorbitan monolaurates, PEG sorbitan monooleates, and combinations thereof; the water-soluble second additive is selected from the group consisting of sorbitol, sorbitan, xylitol, gluconolactone, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A balloon catheter for delivering a therapeutic agent to a target site of a blood vessel, the balloon catheter comprising:
a coating layer overlying an exterior surface of a balloon, wherein; the coating layer comprises a water-soluble first additive, a water-soluble second additive, and a hydrophobic therapeutic agent with an initial drug load of from 2 μ
g to 6 μ
g of the hydrophobic therapeutic agent per square millimeter of the balloon;the hydrophobic therapeutic agent is selected from the group consisting of paclitaxel, rapamycin, and combinations thereof; the hydrophobic therapeutic agent is not enclosed in micelles or liposomes and is not encapsulated in polymer particles; the water-soluble first additive is selected from the group consisting of PEG-20 sorbitan monolaurate and PEG-20 sorbitan monooleate, and combinations thereof; the water-soluble second additive is selected from the group consisting of sorbitol, xylitol, gluconolactone, lactobionic acid, and combinations thereof; and the ratio by weight of the hydrophobic therapeutic agent in the coating layer to the total weight of the water-soluble first and second additives in the coating layer is from about 0.1 to 5. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A balloon catheter for delivering a therapeutic agent to a target site of a blood vessel, the balloon catheter comprising:
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a coating layer overlying an exterior surface of a balloon, wherein; the coating layer comprises a water-soluble first additive, a water-soluble second additive, and an initial drug load of a hydrophobic therapeutic agent; the hydrophobic therapeutic agent is selected from the group consisting of paclitaxel, rapamycin, and combinations thereof; the water-soluble first additive is selected from the group consisting of PEG-20 sorbitan monolaurate, PEG-20 sorbitan monooleate, and combinations thereof; the water-soluble second additive is selected from the group consisting of sorbitol, xylitol, gluconolactone, lactobionic acid, and combinations thereof, whereby the combination of the water-soluble first additive and the water-soluble second additive promotes a rapid release of the hydrophobic therapeutic agent from the balloon, and whereby the rapid release comprises a residual drug amount of the hydrophobic therapeutic agent remaining on the balloon after the balloon is inflated at the target site of the blood vessel for an inflation period of from about 0.1 minutes to 2 minutes and subsequently removed from the blood vessel. - View Dependent Claims (16, 17, 18)
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Specification