Coating for dexamethasone-eluting intravascular stent and its drug sustained release in vitro
- VernacularTitle:地塞米松血管内支架的涂层制备及体外缓释实验研究
- Author:
Yongpeng CHEN
;
Guixue WANG
;
Yan CHEN
;
Xianchun JIN
;
Yanbin HOU
;
Lailong LUO
;
Dagui SUN
- Publication Type:Journal Article
- Keywords:
dexamethasone;
stents;
in vitro;
sustained release
- From:Journal of Third Military Medical University
2003;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To prepare the coating of dexamethasone-eluting intravascular stent and observe the features of its delayed release in vitro.Methods Spray painting and dipping coating were used respectively to prepare stent coating,and then high performance liquid chromatography(HPLC)was used to detect the drug loading.The stents prepared by dipping coating were set in a flow of 50 ml PBS buffer at a velocity of 20 ml/min,and 0.5 ml buffer was collected at 6 h and 1,2,4,6,8,10,12,15 d respectively with another 0.5 ml fresh PBS being added immediately.The drug content of the 0.5 ml buffer was detected by HPLC for drug sustained release in vitro.Results The drug loading of stents prepared by spray painting was(24.26?5.23)?g,while that stents prepared by dipping coating for 4 d was(93.15?7.83)?g.Drugs were released slowly and the release rate reached 84% at 15 d.Conclusion The dipping coating-prepared stents have evident effect of sustained release.
