Preparation technology of nano arsenic trioxide/poly (lactic-co-glycolic acid) coated bracket

A nano arsenic trioxide/poly (lactic-co-glycolic acid) coated bracket comprises a bracket body which is coated by a nano arsenic trioxide coating. The preparation method comprises: a certain amount of arsenic trioxide powder is fully dissolved in a sodium hydroxide solution, and the pH value is adjusted to form A solution; a certain amount of poly (lactic-co-glycolic acid) is dissolved in dichloromethane to form B solution; A solution is added to B solution, and the mixed solution is phacoemulsified to form C solution; polyvinyl alcohol is added to C solution to be ultrasonically dispersed in ice water, and D solution forms; D solution is stirred to form nano arsenic trioxide/poly (lactic-co-glycolic acid) colloidal solution, which is E solution; the stainless steel bare metal stent is ultrasonically cleaned, dried, then kept to stand in B solution; after dried the stent is kept to stand in E solution; the stent is kept in an oven to be dried after the E solution is removed, and the nano arsenic trioxide/poly (lactic-co-glycolic acid) coating stent forms at last.