Xu H, et al. - This study is carried out to evaluate the safety and efficacy of 1.9μm Vela laser in treating of primary non-muscle-invasive bladder cancer. Researchers noticed that en bloc transurethral resection with 1.9μm Vela laser had an advantage over conventional transurethral resection of bladder tumor in reducing intra-operative complications, improving the quality of the specimens admitted for pathological assessment, and shortening the duration of postoperative continuous bladder irrigation.