CRP and systemic inflammatory response syndrome: (28) found that preoperative CRP was an independent risk factor for the occurrence of SIRS after PCNL based on a multifactorial logistic analysis, and by constructing a receiver operating characteristic curve (ROC) curve, they found that the preoperative CRP predicted the occurrence of SIRS after PCNL The best cut-off value for predicting SIRS after PCNL was 0.65 mg/dL, with a specificity of 69.4% and sensitivity of 51.4%, which was consistent with the study of Wang et al.