The present invention relates to polymeric compositions for controlled release or delivery of pharmacologically active agents. Each polymeric composition comprises a biocompatible polymeric matrix containing at least one pharmacologically active agent that is susceptible to oxidative degradation. The biocompatible polymeric matrix comprises at least a first polymeric material with an active antioxidant functional moiety covalently bound thereto in sufficient amount for protecting the at least one pharmacologically active agent against oxidative degradation. Optionally, the biocompatible polymeric matrix further comprises a second polymeric material that is essentially free of covalently bound active antioxidant functional moiety. The present invention also relates to a medical device that comprises an implantable structure, while at least a portion of the implantable structure either comprises or is coated with at least one of the above-described polymeric compositions.
本发明涉及用于控制释放或输送药理活性剂的聚合物组合物。每种聚合物组合物都包括一种
生物相容性聚合物基质,其中含有至少一种易氧化降解的药理活性剂。
生物相容性聚合物基质至少包括第一种聚合物材料,其上共价结合有足够量的活性抗氧化官能团,可保护至少一种药理活性剂不被氧化降解。可选地,
生物相容性聚合物基质还包括基本上不含共价结合的活性
抗氧化剂官能团的第二种聚合物材料。本发明还涉及一种医疗设备,该设备包括一个可植入结构,而该可植入结构的至少一部分包括或涂覆有上述至少一种聚合物组合物。