An expandable medical device includes a plurality of elongated struts, forming a substantially cylindrical device which is expandable from a first diameter to a second diameter. A plurality of different beneficial agents may be loaded into different openings within the struts for delivery to the tissue. For treatment of conditions such as restenosis, different agents are loaded into different openings in the device to address different biological processes involved in restenosis and are delivered at different release kinetics matched to the biological process treated. The different agents may also be used to address different diseases from the same drug delivery device. In addition, anti-thrombotic agents may be affixed to at least a portion of the surfaces of the medical device for the prevention of sub-acute thrombosis. Primer layers may be used to ensure that the different agents remain affixed to the device as well as to each other.
一种可膨胀的医疗设备包括多个细长的支柱,形成一个可从第一直径膨胀到第二直径的基本圆柱形设备。可将多种不同的有益制剂装入支杆内的不同开口,以输送到组织中。在治疗再狭窄等疾病时,可将不同的药剂装入装置的不同开口,以解决再狭窄所涉及的不同
生物过程,并以与所治疗的
生物过程相匹配的不同释放动力学进行输送。不同的药剂也可用于通过同一给药装置治疗不同的疾病。此外,抗血栓药剂可粘附在医疗器械的至少部分表面,以预防亚急性血栓形成。底层可用于确保不同的药剂保持粘附在装置上以及相互粘附。