摘要:
According to one aspect, the present invention provides implantable or insertable medical devices that comprise a substrate and a coating over the substrate that comprises at least one type of conductive polymer and at least one type of additional polymer.
摘要:
According to an aspect of the present invention, at least one ionic therapeutic agent is delivered from an implantable or insertable medical device that comprises an ion-conductive polymeric region that is disposed on a metallic region. The metallic region is in electrical contact with a dissimilar metallic region, such that a galvanic current is generated by the dissimilar metals when the device is implanted or inserted into a patient. Delivery of the ionic therapeutic agent from the ion-conductive polymeric region may be, for example, either accelerated or retarded by the galvanic current. According to another aspect of the present invention, implantable or insertable medical devices are provided which comprise: (a) a first metallic region having a first corrosion potential, (b) a second metallic region in electrical contact with the first metallic region and having a second corrosion potential that is greater than the first corrosion potential, and (c) a solid ion-conductive polymeric region, comprising an ion conducting polymer and an ionic therapeutic agent, disposed on the first metallic region, the second metallic region, or both.
摘要:
An endoprosthesis includes a body defining a flow passage therethrough. The body is capable of maintaining patency in a blood vessel and includes iron or an alloy thereof. The body has a nano-structured surface comprising iron oxide in which the individual nano-structures have a height to thickness aspect ratio of at least 5:1.
摘要:
According to one aspect, the present invention provides implantable or insertable medical devices that comprise a substrate and a coating over the substrate that comprises at least one type of conductive polymer and at least one type of additional polymer.
摘要:
An endoprosthesis includes a composite. The composite includes a matrix comprising a bioerodible iron or a bioerodible iron alloy and particles within the matrix. The particles include palladium, manganese oxide, a transition metal oxide, or a combination thereof.
摘要:
An endoprosthesis includes a body defining a flow passage therethrough. The body is capable of maintaining patency in a blood vessel and includes iron or an alloy thereof. The body has a nano-structured surface comprising iron oxide in which the individual nano-structures have a height to thickness aspect ratio of at least 5:1.
摘要:
Medical devices, such as endoprostheses, and methods of making the devices are described. In some implementations, a stent has a surface region of magnesium with a protective surface layer of magnesium hydride obtained by hydrogen surface modification through an H-EIR process, offering enhanced corrosion resistance.