公开(公告)号：US07964209B2

公开(公告)日：2011-06-21

申请号：US11005852

申请日：2004-12-07

申请人： Shrirang V. Ranade ,  Robert E. Richard ,  Kinh-Luan (Lenny) D. Dao ,  Samuel P. Gido ,  Akinbode Idowu Isaacs-Sodeye

发明人： Shrirang V. Ranade ,  Robert E. Richard ,  Kinh-Luan (Lenny) D. Dao ,  Samuel P. Gido ,  Akinbode Idowu Isaacs-Sodeye

IPC分类号： A61F13/00 ,  A61F2/00 ,  B05D3/02 ,  A61M31/00

CPC分类号： A61L31/10 ,  A61L31/14 ,  A61L31/16 ,  A61L2300/60 ,  A61L2300/602

摘要： The present invention provides a method for the formation of a medical device that comprises a therapeutic agent and a release region, which regulates the rate at which the therapeutic agent is released from the medical device. The method comprises providing a precursor region that comprises a polymer composition comprising two or more microphase separated polymer domains that are immiscible with one another, and forming said release region by a process that comprises applying an orienting field comprising an electric field, a magnetic field, a mechanical shear field, or a solvent gradient field, or a combination of two or more fields to said precursor region, wherein said field or combination of fields changes the spatial orientation of the microphase separated polymer domains within the release region. The electric, magnetic, mechanical shear or solvent gradient field is of sufficient strength to change the spatial orientation of the microphase separated domains. Moreover, the spatial orientation of the immiscible microphase separated polymer domains affects the rate of release of the therapeutic agent from the medical device. Hence, the present invention is further directed to methods of modulating the rate of release of a therapeutic agent from a medical device. Other aspects of the invention are directed to medical devices formed from the above techniques.

摘要翻译： 本发明提供一种形成医疗装置的方法，其包括治疗剂和释放区域，其调节治疗剂从医疗装置释放的速率。 该方法包括提供包含聚合物组合物的前体区域，所述聚合物组合物包含彼此不混溶的两个或更多个微相分离的聚合物区域，并且通过包括施加包括电场，磁场的取向场的方法形成所述释放区域， 机械剪切场或溶剂梯度场，或两个或更多个场的组合与所述前体区域，其中所述场或场的组合改变了微相分离的聚合物区域在释放区域内的空间取向。 电，磁，机械剪切或溶剂梯度场具有足够的强度来改变微相分离域的空间取向。 此外，不混溶的微相分离的聚合物区域的空间取向影响治疗剂从医疗装置释放的速率。 因此，本发明进一步涉及从医疗装置调节治疗剂的释放速率的方法。 本发明的其它方面涉及由上述技术形成的医疗装置。