RESUMEN
Objective To investigate changes in coagulation function and inflammation levels during sepsis.Methods A rat model of sepsis was established using the multiple infection sepsis model(MIM)based on cecal ligation and puncture.Forty-eight male Sprague-Dawley rats were assigned randomly to the following groups:control group,sham group,4 h sepsis group,8 h sepsis group,12 h sepsis group,and 16 h sepsis group(n=8 per group).Inflammatory markers and coagulation-related indicators were measured by enzyme-linked immunosorbent assay and coagulation analysis.Results(1)Lipopolysaccharide(LPS)and interleukin-6(IL-6)levels were significantly higher in the model rats at all time points compared with the sham group(P＜0.001).LPS and IL-6 levels increased gradually with disease progression,with no further changes in LPS after 12 hours.(2)Prothrombin time(PT)was significantly prolonged in the middle and late stages of the sepsis model,starting from 8,compared with the sham group(P＜0.01).(3)Partially activated prothrombin time(APTT)time was significantly prolonged in the 8,12,and 16 h groups compared with the sham group(P＜0.05,P＜0.01).APTT gradually lengthened from 8 h,but approached control levels thereafter.(4)Fibrinogen(Fbg)content was significantly higher in all sepsis groups,except for the 8 h group,compared with the sham group(P＜0.01).(5)Fibrin degradation products(FDP)differed significantly between the control and sham groups(P＜0.01),but not between the sham and sepsis groups.(6)Antithrombin-Ⅲ(AT-Ⅲ)levels decreased significantly throughout each stage of sepsis progression compared with the sham group(P＜0.01),and AT-Ⅲ showed a downward trend with the course of disease,with significant differences among the 4,8,and 16 h groups.Conclusions The MIM rat model can reflect the development of inflammatory and blood coagulation disorders and their relationship during the course of sepsis,and may thus provide a good foundation for further research into the disease course of sepsis.