摘要:
Provided is a coated medical device (e.g., a stent) comprising one or more surfaces having dispersed thereon a plurality of microparticles comprising an active pharmaceutical ingredient (API) and a polymer. Specifically, the microparticles are disposed on a device surface in a microparticulate phase coating, i.e., as discrete microparticles in the absence of a continuous phase coating. The medical device effectively adheres one or more APIs to its surface, and allows controlled release of the APIs from the device surface to a desired treatment area by using a minimal amount of polymer. The medical device is suitable for insertion or implantation into a subject, preferably a human. Also provided are methods for preparing and using the coated medical device.
摘要:
A stent for implantation in a body lumen is described comprising at least one strut having an inner surface, an outer surface, a first side surface disposed between the inner surface and the outer surface, and a second side surface disposed between the inner surface and the outer surface; wherein the first side surface and the second side surface converge toward one another in the direction of the outer surface; and a coating comprising a therapeutic agent disposed on at least a portion of a surface of the strut.
摘要:
A system for delivering therapeutic agent to a target location in a body in accordance with one embodiment is provided comprising a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, and a magnetic device for attracting the magnetic particles to a target location. The magnetic particles may be delivered by a catheter into a blood vessel upstream from the target location so that they travel toward the target location. A method for delivering therapeutic agent to a target location in a body in accordance with another embodiment comprises providing a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, placing a magnetic device in a position to attract the magnetic particles to a target location, and allowing the magnetic particles to infuse the target location by the attraction of the magnetic particles to the magnetic device. The therapeutic agent may comprises a therapeutic agent for preventing or treating reperfusion injury, and the step of providing the plurality of magnetic particles may comprise delivering the plurality of magnetic particles through a blood vessel.
摘要:
A catheter assembly comprising a first polymer, a second polymer and a first weld region. The first polymer forms a balloon having a first waist. The second polymer forms a catheter shaft. The first waist is positioned about a portion of the catheter shaft thereby forming the first weld region. The first weld region comprises a first weld and a second weld which engage the first waist to the catheter shaft. The first weld has a first longitudinal position and the second weld has a second longitudinal position, where the first longitudinal position is different from the second longitudinal position.
摘要:
A system for delivering therapeutic agent to a target location in a body in accordance with one embodiment is provided comprising a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, and a magnetic device for attracting the magnetic particles to a target location. The magnetic particles may be delivered by a catheter into a blood vessel upstream from the target location so that they travel toward the target location. A method for delivering therapeutic agent to a target location in a body in accordance with another embodiment comprises providing a plurality of magnetic particles, each magnetic particle carrying a therapeutic agent, placing a magnetic device in a position to attract the magnetic particles to a target location, and allowing the magnetic particles to infuse the target location by the attraction of the magnetic particles to the magnetic device. The therapeutic agent may comprises a therapeutic agent for preventing or treating reperfusion injury, and the step of providing the plurality of magnetic particles may comprise delivering the plurality of magnetic particles through a blood vessel.
摘要:
A method of creating a porous carbon coating on a medical device by applying a precursor carbon material on the medical device and then pyrolysing the precursor carbon material by laser irradiation. The laser irradiation may be focused to carbonize only certain portions of the medical device and any uncarbonized areas can be removed by solvent washing. Also provided is a medical device having a carbonized coating created according to the method of the present invention.
摘要:
A medical device includes a support structure formed of a metal that is absorbable by a mammalian body. A polymer is disposed on the support structure in at least partially overlying relationship. The polymer has a thickness and a rate of absorption by a mammalian body such that said polymer is substantially completely absorbed, exposing the underlying portion of the support structure, before the underlying portion of the support structure is absorbed. In another embodiment, the medical device includes a support structure formed of a first material, the first material being absorbable by a mammalian body. An absorption inhibitor disposed on the support structure in at least partially overlying relationship and formed of a second material different from the first material. The second material being absorbable by the mammalian body The absorption inhibitor reducing a rate of absorption of the portion of the support structure.
摘要:
According to an aspect of the invention, implantable and insertable medical devices are provided that include (a) a substrate, (b) a porous layer comprising interconnected pores disposed over the substrate, (c) at least one first therapeutic agent disposed within and/or beneath the porous layer, (d) a composite layer disposed over the porous layer that includes (i) at least one therapeutic agent eluting region containing at least one second therapeutic agent and at least one matrix material and (ii) at least one bioerodible region containing at least one bioerodible material that extends from the surface of the composite layer to the porous layer.
摘要:
A medical device comprising: (a) a substrate having first and second surfaces, (b) a therapeutic-agent-eluting polymeric layer disposed over the first substrate surface and (c) a textured polymeric layer that is textured to promote cell attachment, cell growth, or both, disposed over the second surface.