Patent application number | Description | Published |
20100166829 | ACTIVE AGENT ELUTING MATRICES WITH PARTICULATES - The present invention is directed to polymeric matrices for the controlled release of a hydrophilic bioactive agent. Generally, the elution control matrix includes a polymeric matrix having a first polymer and a plurality of microparticles that include the hydrophilic bioactive agent. In one embodiment, the matrix includes a polymer comprising hydrophilic and hydrophobic portions. In another embodiment, the microparticles include a crosslinked hydrophilic polymer. | 07-01-2010 |
20110054417 | BIOACTIVE AGENT RELEASE COATING AND CONTROLLED HUMIDITY METHOD - A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate). | 03-03-2011 |
20120082713 | PHOTOCHROME- OR NEAR IR DYE-COUPLED POLYMERIC MATRICES FOR MEDICAL ARTICLES - The invention provides polymers comprising pendent photochrome or near IR dye groups, as well as polymeric matrices made from these polymers, which can be used as or in association with a medical article. The polymers can be synthesized using methods that facilitate the preparation of medical articles having good biocompatibility. Exemplary polymeric matrices are in the form of lubricious coatings on medical devices, such as catheters. Visualization by irradiation of the photochrome or near IR dye can improve detection of the polymeric matrix on a device or in the body. This, in turn can improve aspects of a medical procedure, such as device insertion or matrix formation, as well as being useful for assessing the quality of the matrix. | 04-05-2012 |
Patent application number | Description | Published |
20090186059 | DEVICES AND METHODS FOR ELUTION OF NUCLEIC ACID DELIVERY COMPLEXES - Embodiments of the invention include devices and methods for the controlled elution of nucleic acid delivery complexes. In an embodiment, the invention includes a method of making a medical device. The method can include complexing nucleic acids with a carrier agent to form a delivery complex solution, applying the delivery complex solution to a substrate, and applying a polymeric solution to the substrate. In another embodiment, the invention includes a method of making a medical device including complexing nucleic acids with a carrier agent to form nucleic acid delivery complexes, combining the nucleic acid delivery complexes with a polymer solution and a cross-linking agent, wherein the cross-linking agent is positively charged or charge neutral. In an embodiment, the invention includes an implantable medical device including a substrate and a coating disposed on a surface of the substrate, the coating comprising a polymeric matrix and a plurality of disperse nucleic acid delivery complexes disposed within the polymeric matrix. Other embodiments are included herein. | 07-23-2009 |
20090263449 | DELIVERY OF NUCLEIC ACID COMPLEXES FROM MATERIALS INCLUDING NEGATIVELY CHARGED GROUPS - Embodiments of the invention include devices and methods for the controlled elution of nucleic acid delivery complexes. In an embodiment, the invention includes a medical device including a substrate surface, a polymeric coating disposed on the surface, the polymeric coating coupled to the substrate surface through the reaction product of a photoreactive group; the polymeric coating comprising negatively charged species on the surface; and a plurality of nucleic acid delivery complexes disposed on the polymeric coating, the nucleic acid delivery complexes comprising a nucleic acid and a cationic carrier agent complexed to the nucleic acid. Other embodiments are included herein. | 10-22-2009 |
20100008966 | Medical Devices and Methods for Delivery of Nucleic Acids - Embodiments of the invention include devices for the release of nucleic acids and related methods. In an embodiment, the invention includes an active agent eluting coating including a polymeric matrix, a cationic carrier agent disposed with the matrix, and an active agent disposed within the matrix, the active agent including nucleic acids substantially uncomplexed with the cationic carrier agent. In an embodiment, the invention includes a method of making an implantable medical device including selecting a concentration of a cationic carrier agent corresponding to a desired elution profile, combining a matrix forming polymer, an active agent, a solvent, and the cationic carrier agent to form a coating composition having the selected concentration of the cationic carrier agent, the active agent comprising nucleic acids, and depositing the coating composition onto the surface of a substrate. Other embodiments are included herein. | 01-14-2010 |