A thin-film covered stent device may include a thin-film mesh and a stent backbone covered by the thin-film mesh, thereby forming a dual-layer stent structure. The thin-film covered stent device may have smaller pores and a high pore density compared to conventional stents. For example, the thin-film covered stent device may have a slit length of between 50 and 250 micrometers and a pore density of between 134 and 227 pores per mm2. The thin-film covered stent device facilitates rapid healing of tissue defects such as those encountered during the endovascular treatment of an aneurysm.
