https://www.selleckchem.com/products/apx2009.html ve. To investigate the impact of two different ureteral stents on the quality of life and erectile function of young and middle-aged men after ureteral laser lithotripsy. A total of 118 male patients aged 22－45 years underwent ureteral laser lithotripsy followed by indwelling of the traditional double-J stent (the DJS group, n = 60) or Polaris loop stent (the PLS group, n = 58). We obtained the general information, intra- and post-operative clinical data, and scores on QOL, IPSS, Visual Analogue Scale (VAS) and IIEF, and compared them between the two groups of patients. There were no statistically significant differences in the body mass index, height, stone diameter, hydronephrosis degree, operation time, intra-operative adverse events, or post-operative stenting time between the two groups of patients. The PLS outperformed the DJS group in such clinical indexes as inflammation markers, lower urinary tract symptoms (LUTS), backache at urination, and QOL, IPSS and VAS scores during stenting at 4 weeks after operation(P < 0.05). The IIEF scores of the PLS and DJS groups were 8.44 ± 2.10 vs 12.50 ± 1.78 (P = 0.003) at 2 weeks, 8.65 ± 1.90 vs 13.42 ± 1.88 (P = 0.002) at 4 weeks, and 13.57 ± 1.01 vs 17.38 ± 2.47 (P = 0.003) at 6 weeks after operation, with no statistically significant difference between the two groups at 8 weeks. Ureteral stenting affects the quality of life and erectile function of young and middle-aged male patients after ureteral laser lithotripsy. The Polaris loop stent affects less the quality of life and erectile function of the patients than the traditional double-J stent during postoperative stenting. Ureteral stenting affects the quality of life and erectile function of young and middle-aged male patients after ureteral laser lithotripsy. The Polaris loop stent affects less the quality of life and erectile function of the patients than the traditional double-J stent during postoperative stenting