摘要:
A method of producing a stent-balloon assembly is disclosed which includes providing a stent having a polymeric component; exposing the stent to a relative humidity of 20% to 100%; and crimping the stent on a balloon of a catheter assembly. The polymeric component could be at least part of the material from which the stent is made or could be a constituent of a coating for the stent, such as a drug delivery coating. In lieu of or in addition to the application of humidity, a plasticizing agent can be applied to the polymeric component. A crimping device is also disclosed which allows the stent to be exposed to humidity during the crimping process.
摘要:
Embodiments of coatings for implantable medical devices, such as stents, are disclosed. The devices may include at least one structural element having an abluminal side, luminal side, and sidewalls between the abluminal and luminal sides. The coating may include at least two continuous coating layers. In some embodiments, the luminal side, and all or a majority of the sidewalls are free of at least two of the coating layers.
摘要:
A polymer coating for medical devices based on a polyolefin derivative. A variety of polymers are described to make coatings for medical devices, particularly, for drug delivery stents. The polymers include homo-, co-, and terpolymers having at least one olefin-derived unit and at least one unit derived from vinyl alcohol, allyl alcohol and derivatives thereof.
摘要:
Provided herein is a poly(ester amide) (PEA) polymer blend and a polymeric coating containing the PEA polymer blend. The PEA polymer blend has a Tg above the Tg of poly(ester amide benzyl ester) (PEA-Bz) or the Tg of poly(ester amide TEMPO). The PEA polymer blend can form a coating on an implantable device, one example of which is a stent. The coating can optionally include a biobeneficial material and/or optionally with a bioactive agent. The implantable device can be used to treat or prevent a disorder such as one of atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, and combinations thereof.
摘要翻译:本文提供了聚(酯酰胺)(PEA)聚合物共混物和含有PEA聚合物共混物的聚合物涂层。 PEA聚合物共混物在聚(酯酰胺苄酯)(PEA-Bz)或T N g N T T上方具有T N' 的聚(酯酰胺TEMPO)。 PEA聚合物共混物可以在可植入装置上形成涂层,其一个实例是支架。 涂层可任选地包括生物有益材料和/或任选地含有生物活性剂。 可植入装置可用于治疗或预防动脉粥样硬化,血栓形成,再狭窄,出血,血管解剖或穿孔之一,血管动脉瘤,易损斑块,慢性完全闭塞,跛行,静脉和人造移植物的吻合增殖等障碍 导管阻塞,输尿管阻塞,肿瘤阻塞及其组合。
摘要:
A system, nozzle assembly, and method for coating a stent with a solvent and polymer are provided. The polymer can include a therapeutic substance or a drug. The polymer and solvent can be discharged from separate tubes disposed within another tube carrying moving air. The polymer and the solvent mix together when they are discharged and are atomized by the air. The ends of the tubes can be concentric with each other.
摘要:
A polymer blend that contains a polymer of fluorinated monomers and another biocompatible polymer. The polymer blend can form a coating on a medical device. The medical device can be used for treat, prevent or ameliorate a medical condition.
摘要:
An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent includes rings aligned along a common longitudinal axis and connected by links, where the stent has one or more portals for aligning with and partially expanding into the opening to the side branch vessel. The stent is implanted at a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel. Radiopaque markers on the stent and on the tip of the delivery catheter assist in aligning the portal section with the opening to the side branch vessel.
摘要:
Provided herein is a poly(ester amide) (PEA) polymer blend and a polymeric coating containing the PEA polymer blend. The PEA polymer blend has a Tg above the Tg of poly(ester amide benzyl ester) (PEA-Bz) or the Tg of poly(ester amide TEMPO). The PEA polymer blend can form a coating on an implantable device, one example of which is a stent. The coating can optionally include a biobeneficial material and/or optionally with a bioactive agent. The implantable device can be used to treat or prevent a disorder such as one of atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, and combinations thereof.
摘要翻译:本文提供了聚(酯酰胺)(PEA)聚合物共混物和含有PEA聚合物共混物的聚合物涂层。 PEA聚合物共混物在聚(酯酰胺苄酯)(PEA-Bz)或T N g N T T上方具有T N' 的聚(酯酰胺TEMPO)。 PEA聚合物共混物可以在可植入装置上形成涂层,其一个实例是支架。 涂层可任选地包括生物有益材料和/或任选地含有生物活性剂。 可植入装置可用于治疗或预防动脉粥样硬化,血栓形成,再狭窄,出血,血管解剖或穿孔之一,血管动脉瘤,易损斑块,慢性完全闭塞,跛行,静脉和人造移植物的吻合增殖等障碍 导管阻塞,输尿管阻塞,肿瘤阻塞及其组合。
摘要:
An expandable metallic stent has discontinuities of non-conducting material. These eliminate electrically conducting paths in the stent rings and cells. This makes the stent easier to image with magnetic resonance imaging (MRI). The non-conducting material can include adhesives, polymers, ceramics, composites, nitrides, oxides, silicides, and carbides. The discontinuity is preferably shaped so that during expansion the discontinuity is placed in primarily a compressive stress.