ALB and hydronephrosis: The characteristics of the post-PCNL SIRS group, compared to the non-SIRS group, were marked by elevated stone density (p < 0.001), prolonged operative duration (p = 0.002), negative hydronephrosis (p < 0.001), increased white blood cell (WBC) counts (p = 0.039), low serum albumin levels (p = 0.030), positive urine leukocytes (p = 0.043), positive urine detection for bacteria (p < 0.001), and decreased percentage of Tph cell (p < 0.001) (Tables 1, 2).