摘要:
According to an aspect of the invention, implantable or insertable medical devices are provided which contain the following: (a) one or more porous regions comprising pores and (b) one or more therapeutic agents which are (i) contained within the porous region, (ii) disposed beneath the porous region, or (iii) both. Moreover, the porous regions are capable of undergoing a change in configuration, such that the pores undergo a change in configuration, upon subjecting the porous regions to activating stimuli.
摘要:
An endoprosthesis such as a coronary stent includes a polymeric reservoir of drug and an over coating formed of ceramic or metal for controlling elution of drug from the reservoir.
摘要:
According to an aspect of the present invention, long term medical articles are provided which include the following: (a) first and second body contacting (e.g., tissue and/or body-fluid contacting) porous polymeric layers; (b) a polymeric barrier layer disposed between the first and second porous polymer layers; and (c) a reinforcement element. According to another aspect of the present invention, tubular medical articles for long term implantation are provided, which comprise: (a) a reinforcement element; (b) a blood contacting porous polymeric layer having a surface energy ranging between 20 and 30 dynes/cm disposed over an inner surface of the reinforcement element; and (c) an additional porous polymeric layer formed over an outer surface of the reinforcement element.
摘要:
Methods and apparatuses for coating surfaces of medical devices by electroplating are disclosed. In one embodiment, the invention includes a coating method in which a mixture of a therapeutic agent, and a plating material are electroplated onto the surface of the medical device. The electroplating method may be performed at a relatively low temperature to avoid destruction of the therapeutic agent. In another embodiment, a coating method is disclosed in which the coating is formed by suspending a therapeutic agent in an electrolytic solution and electroplating a plating material onto the medical device wherein the plating material carries the supended therapeutic agent. Thus, the coating of plating material contains the suspended therapeutic agent. These methods and apparatuses are used to apply one or more coating materials, simultaneously or in sequence by varying the electroplating voltage. In certain embodiments of the invention, the coating materials include therapeutic agents and cationic drugs.
摘要:
A method includes: providing a substrate, depositing a ceramic and an extractable material onto the substrate, forming a porous structure in the ceramic by removing the extractable material, and utilizing the ceramic in an endoprosthesis. An endoprosthesis, such as a stent, including a coating formed of a ceramic and an extractable material that can be removed from the coating to form voids is also disclosed.
摘要:
According to an aspect of the invention, implantable or insertable medical devices are provided which contain the following: (a) one or more porous regions comprising pores and (b) one or more therapeutic agents which are (i) contained within the porous region, (ii) disposed beneath the porous region, or (iii) both. Moreover, the porous regions are capable of undergoing a change in configuration, such that the pores undergo a change in configuration, upon subjecting the porous regions to activating stimuli.