Abstract:Objective To study the serum immunosuppressive acid protein (IAP) level in patients with acute suppurative cholangitis (APC) in order to explore its clinical significance. Methods Totally 160 patients with APC were selected as the APC group, and 160 healthy patients during the same period were selected as the control group (group C) from January 2017 to December 2018. The IAP, neutrophils, lymphocytes, C-reactive protein (CRP), WBC, alkaline phosphatase (ALP) and direct bilirubin (DBIL) levels were determined. The neutrophil/lymphocyte (NLR) values were calculated. Results Before treatment, the levels of serum IAP, NLR, CRP, WBC, ALP and DBIL in APC group were higher than those in group C (P < 0.05). The levels of serum IAP, NLR, CRP, WBC, ALP and DBIL in the severe group were higher than those in the mild group (P < 0.05). After treatment, the serum AAP, NLR, CRP, ALP and DBIL levels in APC patients were lower than those before treatment (P < 0.05). The serum IAP levels in APC patients were positively correlated with NLR(r = 0.702, P < 0.05), CRP(r = 0.684, P < 0.05), WBC(r = 0.573, P < 0.05), ALP(r = 0.487, P < 0.05) and DBIL(r = 0.526, P < 0.05) levels. Conclusion The serum IAP level is elevated in patients with APC, and IAP level has certain guiding value in the severity of APC, inflammatory response and therapeutic effect evaluation.