摘要:
A medical device and methods of making the medical device such as a stent having selected regions with different material properties than other regions are disclosed. Selection and modification of the regions may be based on facilitating a desired mechanical behavior and/or therapeutic prophylactic property of the device.
摘要:
The invention provides an implantable medical device comprising: a structural element, wherein the structural element includes: a continuous phase comprising a first polymer; a discrete phase within the continuous phase, wherein the discrete phase has a second polymer including discrete phase segments; and anchor segments that have substantially the same chemical make up as the first polymer of the continuous phase; wherein at least some of the anchor segments have partially or completely phase-separated from the discrete phase into the continuous phase.
摘要:
The present invention relates to a method of polishing an implantable medical device. The method may include positioning an implantable medical device on a support. At least a portion of a surface of the implantable medical device may include a polymer. A fluid may be contacted with at least a portion of the surface of the positioned implantable medical device. In an embodiment, the fluid may be capable of dissolving at least a portion of the polymer at or near the surface of the implantable medical device. The method may further include allowing the fluid to modify at least a portion of the surface of the positioned medical device. A majority of the contacted fluid may be removed from the surface of the implantable medical device. In certain embodiments, the modified portion of the surface may be substantially less thrombogenetic and substantially more mechanically stable than an unmodified surface.
摘要:
Implantable medical devices for treating bodily disorders local and distally to a region of implantation are disclosed. The devices include a body structure including an active agent, erodable particles acting as a carrier of the active agent, and an erodable binder. The binder releasably binds the particles together such that after implantation the binder erodes to release the particles.
摘要:
The present invention relates to a method of polishing an implantable medical device. The method may include positioning an implantable medical device on a support. At least a portion of a surface of the implantable medical device may include a polymer. A fluid may be contacted with at least a portion of the surface of the positioned implantable medical device. In an embodiment, the fluid may be capable of dissolving at least a portion of the polymer at or near the surface of the implantable medical device. The method may further include allowing the fluid to modify at least a portion of the surface of the positioned medical device. A majority of the contacted fluid may be removed from the surface of the implantable medical device. In certain embodiments, the modified portion of the surface may be substantially less thrombogenetic and substantially more mechanically stable than an unmodified surface.
摘要:
Implantable medical devices fabricated from polymer/bioceramic composites with different types of bioceramic particles are disclosed. The plurality of bioceramic particles can include acidic particles and basic particles, the acidic particles and basic particles having different particle size distributions. The degradation of a selected type of particle can be reduced or prevented during a selected time frame by encapsulating some or all of the selected type of particles with a bioabsorbable polymer.
摘要:
An implantable medical device is disclosed having a helical construct including a set of spiral coils for local in vivo application of a therapeutic substance in a biological lumen. The helical construct is configured to apply less than 0.75 Bar of pressure to the biological lumen wall. The helical construct can have at least two sets of spiral coils having opposing helical directions. The device can be used for the treatment of vascular disorders such as restenosis and vulnerable plaque.
摘要:
A bioabsorbable polymeric stent with time dependent structure and properties and methods of treating a diseased blood vessel with the bioabsorable polymeric stent are disclosed. The structure and properties of the stent change with time and allow the vessel to be restored to a natural unstented state. The bioabsorbable stent loses mechanical integrity in a controlled manner due to modification of selected structural elements.