Objective To explore the relationship between serum levels of soluble triggering receptor expressed on myeloid cells-1(sTREM-1),procalcitonin(PCT)combined with endotoxin(ET)and prognosis of patients with severe pneumonia.Methods 200 cases of severe pneumonia and 100 cases of common pneumonia admitted to Jinhua People's Hospital from January 2022 to January 2023 were selected as study group and control group respectively.Patients in study group were divided into death group and survival group according to the prognosis of 28 days.Serum sTREM-1,PCT and ET levels were detected in all patients,and the differences among all groups were compared;The relationship between serum indexes and acute physiology and chronic health evaluation Ⅱ(APACHE Ⅱ)on the first day of admission was analyzed;Receiver operating characteristic(ROC)curve was used to analyze the diagnostic efficacy of serum sTREM-1,PCT and ET levels on the first day after admission to the hospital.Results Serum sTREM-1,PCT and ET levels in study group were significantly higher than those in control group on the 1st day after admission(P＜0.05).Serum sTREM-1,PCT,ET levels and APACHE Ⅱ score in death group were significantly increased on the 4th and 7th day after admission compared with the 1st day(P＜0.05),while the above indexes in survival group were significantly decreased on the 4th and 7th day after admission compared with the 1st day(P＜0.05).Serum sTREM-1,PCT,ET levels and APACHE Ⅱ scores in severe pneumonia death group were significantly higher than those in survival group on the 1st day,4th day and 7th day after admission(P＜0.05).Serum sTREM-1,PCT,ET levels were positively correlated with APACHE Ⅱ score(P＜0.05),and serum indexes were positively correlated in severe pneumonia patients on the 1st day after admission(P＜0.05).When serum sTREM-1＞56.90ng/L on the 1st day after admission,the sensitivity and specificity of patients with severe pneumonia was 89.13％and 75.32％respectively;When PCT＞12.97μg/L,the sensitivity and specificity was 76.09％and 85.06％;When ET＞13.62pg/ml,the sensitivity was 73.91％and the specificity was 66.88％;The sensitivity and specificity was 89.13％and 96.75％respectively detected by the three indexes combined.Conclusion Serum sTREM-1,PCT,ET levels are highly expressed in severe pneumonia,which is closely related to the prognosis of patients,and the combined detection of the three indexes is of great value in predicting the death of patients with severe pneumonia.

Objective To explore the relationship between serum levels of soluble triggering receptor expressed on myeloid cells-1(sTREM-1),procalcitonin(PCT)combined with endotoxin(ET)and prognosis of patients with severe pneumonia.Methods 200 cases of severe pneumonia and 100 cases of common pneumonia admitted to Jinhua People's Hospital from January 2022 to January 2023 were selected as study group and control group respectively.Patients in study group were divided into death group and survival group according to the prognosis of 28 days.Serum sTREM-1,PCT and ET levels were detected in all patients,and the differences among all groups were compared;The relationship between serum indexes and acute physiology and chronic health evaluation Ⅱ(APACHE Ⅱ)on the first day of admission was analyzed;Receiver operating characteristic(ROC)curve was used to analyze the diagnostic efficacy of serum sTREM-1,PCT and ET levels on the first day after admission to the hospital.Results Serum sTREM-1,PCT and ET levels in study group were significantly higher than those in control group on the 1st day after admission(P＜0.05).Serum sTREM-1,PCT,ET levels and APACHE Ⅱ score in death group were significantly increased on the 4th and 7th day after admission compared with the 1st day(P＜0.05),while the above indexes in survival group were significantly decreased on the 4th and 7th day after admission compared with the 1st day(P＜0.05).Serum sTREM-1,PCT,ET levels and APACHE Ⅱ scores in severe pneumonia death group were significantly higher than those in survival group on the 1st day,4th day and 7th day after admission(P＜0.05).Serum sTREM-1,PCT,ET levels were positively correlated with APACHE Ⅱ score(P＜0.05),and serum indexes were positively correlated in severe pneumonia patients on the 1st day after admission(P＜0.05).When serum sTREM-1＞56.90ng/L on the 1st day after admission,the sensitivity and specificity of patients with severe pneumonia was 89.13％and 75.32％respectively;When PCT＞12.97μg/L,the sensitivity and specificity was 76.09％and 85.06％;When ET＞13.62pg/ml,the sensitivity was 73.91％and the specificity was 66.88％;The sensitivity and specificity was 89.13％and 96.75％respectively detected by the three indexes combined.Conclusion Serum sTREM-1,PCT,ET levels are highly expressed in severe pneumonia,which is closely related to the prognosis of patients,and the combined detection of the three indexes is of great value in predicting the death of patients with severe pneumonia.