Patent ID: 8518429

Claim:
An arsenic trioxide medical elution scaffold comprising a scaffold, a polymer coating covering the scaffold and arsenic trioxide loaded in the polymer coating, characterized in that the arsenic trioxide is loaded in the polymer coating as single particles or as isolated and scattered conglomerated particles, wherein at least a portion of the single particles or conglomerated particles are embedded in polymer microspheres, the single particles, the conglomerated particles or the polymer microspheres with embedded arsenic trioxide particles having a particle size of 0.01 to 50 μm, the weight ratio of arsenic trioxide to the polymer being 0.5 to 1.5, the content of arsenic trioxide being 0.47-1.11 μg/mm 2 , and the polymer being a degradable polymer, wherein the degradable polymer is one or more polymers selected from the group consisting of polysaccharide, polyhydroxyalkyl alcohol ester, poly(β-malate), poly-α-hydroxyacid esters, polyamino acid, pseudo-polyamino acid, polycarbonate, and polyanhydride.