In this work a new method was described to prepare 32 P-radioactive stents which was used to reduce the restenosis after PTCA. This new method included four steps: electroplating Ni film which can catalyze the chemical plating reaction; chemical plating Ni-( 32P)P film; electroplating Au film and heat treating on 620-640℃. The second step was most important. 32 P-calcium hypophosphite was adopted as the radioactive source. 22 of 32 P-stents with the radioactivity range from 0.3 to 1.4 were achieved successfully.
