Objective:To evaluate the prognostic value of thromboelastography maximum amplitude(MA)and arterial blood lactate levels for sepsis in elderly patients.Methods:A retrospective analysis was performed on clinical data of 63 sepsis patients(≥60 years old)admitted to the Intensive Care Unit(ICU)of Bethune Hospital of Shanxi Province from December 2018 to February 2020.MA values, white blood cell counts, lymphocyte counts, platelets, acute physiology and chronic health evaluation Ⅱ(APACHE Ⅱ)scores, sequential organ failure assessment(SOFA)scores, underlying diseases, body mass index, laboratory test results and other related treatments were analyzed.The subjects were divided into the survival group and the death group according to the 28-day survival outcome.Differences in MA, APACHE Ⅱ scores, SOFA scores and laboratory test results between the two groups were analyzed, and the correlations of MA with infection parameters and age were examined.Influencing factors of survival outcomes were analyzed using multivariate Logistic regression.The receiver operating characteristic curve(ROC)was used to calculate the prognostic value of MA and arterial lactate for sepsis in elderly patients.Results:The main sources of infections were pulmonary and abdominal(79.4%, 50/63)in 63 elderly patients with sepsis.The incidences of positive blood cultures and deaths were 15.9%(10/63)and 66.7%(42/63), respectively.There existed significant differences in lymphocyte counts, arterial lactate levels, MA and lengths of stay in the ICU between the survival group and the death group( t=3.847, 2.153, 2.745, -3.574, respectively, all P<0.05).MA was correlated with arterial lactate, SOFA score and survival outcome( r=-0.498, -0.506, and -0.358, respectively, all P<0.05).Multivariate Logistic regression analysis showed that MA and arterial lactate were independent factors for the survival outcome( OR=1.626, 0.766, all P<0.05).The area under the ROC curve(AUC, 95% CI)for the combination of MA and arterial lactate was larger than that of either MA or arterial lactate alone(0.89, range: 0.763-0.846; 0.58, range: 0.574-0.730; 0.77, range: 0.521-0.832; all P<0.05). Conclusions:The combination of thromboelastography maximum amplitude and lactate in arterial blood has important clinical value in assessing the prognosis of elderly patients with sepsis.

Objective:To screen lipid biomarker in sepsis patients with different survival outcome based on ultra high performance liquid chromatography-mass spectrometry(UHPLC-MS/MS) technique.Methods:From September 2019 to April 2020, 30 septic patients admitted in Department of Intensive Care Unit and 30 cases of physical examination at the same time in Shanxi Bethune Hospital were studied. Lipid metabolite in serum were detected by UHPLC-MS/MS technique. According to the 28 day survival outcome of sepsis patients, they were divided into survival group (21 cases) and death group (9 cases). The baseline data of case group and control group, survival group and death group were compared respectively. Independent sample t-test and orthogonal partial least squares discriminant analysis (OPLS-DA) were further performed to identify lipid biomarkers related to sepsis survival outcome. Receiver operating characteristic (ROC) curve to evaluate the predictive efficacy of differential lipids on the survival outcome of biomarker sepsis patients. Results:There were 32 lipid subclasses and 1 437 differential lipid molecules in the sepsis group compared with the control group. 196 differential lipid molecules in the sepsis survival group and the death group were screened according to the OPLS-DA model (variable weight of projection (VIP)>1), which were glycerophosphingolipids (129), sphingolipids (52), glycerides (14), and sterols (1).All the original data were statistically analyzed by univariate independent sample t-test. There were statistically significant differences in 15 lipid molecules between the two groups. Combined with VIP > 1 and P < 0.01, three lipid molecules were finally screened, which were sphingomyelin (SM) lipid molecules, SM (d30∶1), SM (d32∶2), SM (d32∶1). ROC curve analysis showed that the areas under curves of the above three lipid molecular were 0.915, 0.892, 0.898, respectively. The sensitivity was 77.27%, 95.45%,72.73%. The specificity was 100.0%, 87.5%,100.0%. Further Z-test showed that there was no significant difference in the area under the ROC curve ( Z(SM (d30∶1) and SM (d32∶1)) =0.36, P=0.722; Z(SM (d30∶1) and SM (d32∶2))=0.34, P=0.732; Z(SM (d32∶1) and SM (d32∶1))=0.07, P=0.942). Conclusions:Sphingomyelin may be involved in the formation of different clinical outcomes of sepsis, and has a good predictive effect on the survival outcome of sepsis.