Coating for use with medical devices and method of making same
First Claim
1. A flexible coating for a medical device, the coating comprising:
- RTV silicone and urethane, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-trimethoxysilyl)propyl] isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane.
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Accused Products
Abstract
The inventive coating may be employed to deliver a pharmaceutical agent to a selected body area that is involved within the insertion or application of a medical device. Such medical devices may include silicone based urinary catheters and other medical implants as well as other silicone based devices having deformable portions which could benefit from the release of a pharmaceutical agent from its surface. The coating allows the introduction of the pharmacological additive having a release rate that is within acceptable pharmacokinetic criteria. The release rate is adjusted by utilizing different salt forms of the additive and adjusting the concentration of urethane and RTV silicone. The coating incorporates additive compounds such as anti-microbial, anti-fungals and other organic compounds. Methods are also provided for the manufacture of the subject coating and for the application of the same to surfaces of medical devices.
30 Citations
41 Claims
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1. A flexible coating for a medical device, the coating comprising:
- RTV silicone and urethane, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-trimethoxysilyl)propyl] isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- 14. A flexible coating including RTV silicone and urethane for a silicone based medical device, the flexible coating being disposed on a deformable surface of the silicone based medical device and retaining adhesion to the deformable surface, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-trimethoxysilyl)propyl] isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane.
- 17. A flexible silicon based medical device coating comprising RTV silicone and urethane said coating being adherently disposed on a deformable surface of said device, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-trimethoxysilyl)propyl], isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane.
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28. A method for producing a coating for a medical article comprising:
- blending RTV silicone, urethane, in a solvent until dissolved, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-(trimethoxysilyl)propyl] isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane.
- View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of controlling the release rate of a medicinal additive from a coating vehicle comprising:
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providing a coating vehicle including urethane, RTV silicone and a medicinal additive, wherein said RTV silicone is selected from the group consisting of methyltri-methoxy silane, methyltri-acetoxy silane, tetrachlorosilane, vinyl trimethoryl silane, organosilane ester tris[3-(trimethoxysilyl)propyl] isocyanurate, bis[trimethoxysilyl)propyl] amine and gamma-ureidopropyl trimethoxy silane;
determining a therapeutic dosing range of the pharmacological additive;
determining pharmacokinetic properties of the pharmacological additive; and
adjusting concentration of the urethane to the RTV silicone to achieve a desired release rate.
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Specification