Objective To build a new biodegradable ureteral drug-eluting stent(DES), and investigate its degradation characteristics, drug release property and histocompatibility in vivo and vitro. Methods Two typical specimens were constructed with Poly-L-Lactide(PLLA), Poly-DL-Lactide(PDLLA) and rapamycin. The flaky specimens were dipped into fresh urine sample with gentle agitation in vitro. Scanning Electron Microscope(SEM) and mass measurement were performed to investigate the biodegradation characteristics of ste...