ObjectiveTo investigate the potential role and mechanism of hydrogen sulfide (H2S) in regulating arterial baroreflex (ABR) in septic rats. MethodsThe rat model of cecal ligation and puncture (CLP) induced sepsis was established. Fortyseven male SpargueDawley rats were randomly divided into 9 groups: ① Sham operation (SO)+0.9% NaCl (NS) intravenous injection (i.v.) group; ② SO+NaHS i.v. group; ③ CLP+NaHS i.v. group; ④ SO+artificial cerebrospinal fluid (aCSF) bilater nucleus tractus solitarii (NTS) microinjection group; ⑤ SO+NaHS bilater NTS microinjection group; ⑥ SO+vehicle (DMSO)+NaHS group; ⑦ SO+Gli+NaHS group; ⑧ CLP+vehicle (DMSO) group; ⑨ CLP+Gli group. The ABR function was measured before administration and 5 min and 30 min after administration. Results① The ABR value of rats at different time in the same group: Compared with the ABR value before administration in the SO+NaHS i.v. group, CLP+NaHS i.v. group, SO+NaHS bilater NTS microinjection group, and SO+vehicle+NaHS group, the ABR values of rats significantly decreased at 5 min and 30 min after administration (Plt;0.05, Plt;0.01), which significantly increased in the CLP+Gli group at 5 min and 30 min after administration (Plt;0.05). ② The ABR value of rats at the same time in the different groups: Before administration, the ABR value of rat in the CLP+NaHS i.v. group was significantly lower than that in the SO+NS i.v. group or SO+NaHS i.v.group (Plt;0.05). At 5 min and 30 min after adminis tration, the ABR value of rat in the CLP+NaHS i.v. group was significantly lower than that in the SO+NS i.v. group or SO+NaHS i.v. group (Plt;0.05), which in the SO+NaHS i.v. group or SO+NaHS bilater NTS microinjection group was significantly lower than that in the SO+NS i.v. group or SO+aCSF bilater NTS microinjection group, respectively (Plt;0.05, Plt;0.01), in the SO+Gli+NaHS group or CLP+Gli group was significantly higher than that in the SO+vehicle+NaHS group or CLP+vehicle group, respectively (Plt;0.05). ConclusionsH2S plays an adverse role in septic ABR function, and opening KATP channel located at the pathway of ABR, may be the mechanism involved in the downregulation of ABR function in septic rat. Notably, the NTS may be also responsible for reduction of ABR value.
Objective To explore independent risk factors for 30-day mortality in critical patients with pulmonary infection and sepsis, and build a prediction model. Methods Patients diagnosed with pulmonary infection and sepsis in the MIMIC-Ⅲ database were analyzed. The CareVue database was the training cohort (n=934), and the Metavision database was the external validation cohort (n=687). A COX proportional hazards regression model was established to screen independent risk factors and draw a nomogram. We conducted internal cross-validation and external validation of the model. Using the receiver operator characteristic (ROC) curve, Calibration chart, and decision curve analysis, we detected the discrimination, calibration, and benefit of the model respectively, comparing with the SOFA scoring model. Results Age, SOFA score, white blood cell count≤4×109/L, neutrophilic granulocyte percentage (NEU%)>85%, platelet count (PLT)≤100×109/L, PLT>300×109/L, red cell distribution width >15%, blood urea nitrogen, and lactate dehydrogenase were independent risk factors. The areas under the ROC curve of the model were 0.747 (training cohort) and 0.708 (external validation cohort), respectively, which was superior to the SOFA scoring model in terms of discrimination, calibration, and benefit. Conclusion The model established in this study can accurately and effectively predict the risk of the disease mortality, and provide a visual assessment method for early identification of high-risk patients.
Objective To investigate the clinical value of peripheral serum cell-free DNA/neutrophil extracellular traps (cf-DNA/NETs) level in diagnosis and severity assessment of sepsis patients. Methods Forty patients with sepsis and 40 patients with non-infectious systemic inflammatory response syndrome (nf-SIRS) were enrolled in this study. The cf-DNA/NETs level in serum of all subjects were measured. Receiver operating characteristic (ROC) curve was used to evaluate the diagnostic ability of the cf-DNA/NETs, white blood cell count (WBC), procalcitonin (PCT) and interleukin-6 (IL-6). The sepsis patients were stratified into a survival group and a death group according to the prognosis. Sequential organ failure (SOFA) score were recorded in the sepsis patients, and the correlations between SOFA and cf-DNA/NETs, PCT, WBC, IL-6 were analyzed. Results Compared with the nf-SIRS group, cf-DNA/NETs and PCT levels were significantly higher in the sepsis group (both P<0.05). WBC and IL-6 showed no significant differences between the two groups (bothP>0.05). The area under the ROC curve (AUC) of cf-DNA/NETs was 0.884 for diagnosis of sepsis, and it was higher than the AUC of PCT (0.803). The cf-DNA/NETs showed better sensitivity (81.2% and 79.2%) and specificity (81.0% and 82.4%) than PCT. cf-DNA/NETs and PCT were significantly higher in the death group than those in the survival group. Bivariate collection analysis revealed positive correlations between SOFA score and the two biomarkers of cf-DNA/NETs and PCT (r1=0.573, r2=0.518; both P<0.01). Conclusions cf-DNA/NETs and PCT have certain value in early diagnosis of sepsis, and cf-DNA/NETs shows better diagnostic value in distinguishing sepsis from nf-SIRS than PCT. cf-DNA/NETs can be used as a routine monitoring index to help assess disease severity in sepsis.
Objective To evaluate the predicting effect of quick Sequential Organ Failure Assessment (qSOFA) on septic shock, and investigate the probability of improving the predicting effect. Methods Patients with sepsis diagnosed in Emergency Department from July 2015 to June 2016 were enrolled. They were divided into shock group and non-shock group based on whether or not they had septic shock during 72 hours after admission. The multivariate logistic regression analysis was used to find out the independent risk factors affecting the incidence of septic shock. Receiver operating characteristic (ROC) curve was used to analyze those risk factors. Modified Early Warning Score (MEWS), Mortality in Emergency Department Sepsis Score (MEDS), Sequential Organ Failure Assessment (SOFA), Acute Physiology and Chronic HealthEvaluation (APACHE)Ⅱ and qSOFA were also compared with ROC curve analysis. The possibility of improvement of qSOFA predicting effect was discussed. Results A total of 821 patients were enrolled, with 108 in septic shock group and 713 in non-septic shock. The result of multivariate logistic regression analysis indicated that respiratory rate, systolic blood pressure, pH value, oxygenation index, lactate, albumin, Glasgow Coma Score and procalcitonin were the independent risk factors (P<0.05). The result of ROC analysis showed that the area under curve (AUC) of pH value, lactate and procalcitonin was 0.695, 0.678 and 0.694, respectively. Lactate had the highest value of specificity (0.868), positive predictive value (0.356) and positive likelihood ratio (3.644), while the sensitivity (0.889) and negative predictive value (0.961) of procalcitonin were the highest. MEWS, MEDS, SOFA, APACHEⅡ and qSOFA were compared with ROC. SOFA had the best predicting effect with the statistical results of AUC (0.833), sensitivity (0.835), specificity (0.435), positive predictive value (0.971), negative predictive value (0.971), and positive likelihood ratio (5.048); and MEWS had the highest negative likelihood ratio (0.581). qSOFA did not show a best predicting value. Conclusion qSOFA is not the best choice to predict the possibility of septic shock, but its predicting value might be improved when combined with pH value, lactate and procalcitonin.
Sepsis, a serious clinical syndrome known as organs dysfunction caused by an unbalanced host inflammatory response to infection, is of great concern in emergency medicine. Over the past two decades, the definition of sepsis has changed from systemic inflammatory response syndrome lead by infection to organs damage caused by infection. Under the new diagnostic criterion, septic patients are too serious to be treated in Emergency Department, and need intensive treatment of Intensive Care Unit. In this paper, by analyzing the development process from infection to sepsis and expounding the role of cytokines in the development of sepsis, we think that measures should be taken at the early stage of infection in order to prevent and block the occurrence of sepsis.
Objective To investigate the effects of ulinastatin on Treg/Th17 and immune status in patients with severe sepsis.Methods A total of 80 patients with severe sepsis, who were hospitalized in ICU during October 2011 to July 2012, were randomly divided into a routine group and a ulinastatin group. The patients in the ulinastatin group were intravenously administered 30mg ulinastatin three times per day for 5 days in addition to routine bundle treatment. The expression of Treg, Th17 and HLA-DR were detected on the first day in ICU and 5 days after treatment. 20 healthy individuals served as controls. Results Compared with the control group, the severe sepsis group had overexpression of Treg and Th17 ( P lt;0. 01) , higher ratio of Treg/Th17( P lt;0. 01) , and decreased HLA-DR expression of CD14 monocyte ( P lt; 0. 01) . In the severe sepsis patients, ulinastatin injection reduced the abnormal expression of Treg and Th17 ( P lt; 0. 01) , decreased the ratio of Treg/Th17( P lt; 0. 01) , and improved the expression of HLA-DR ( P lt; 0. 01) more effectively compared with the routine treatment. Ulinastatin also lowered 28-day mortality of the patients with sepsis, but the difference between the ulinastatin group and the routine group was not significant. Conclusions In severe sepsis patients, there were abnormal overexpression of Treg and Th17, imbalance of Treg/Th17, and underexpression of HLA-DR which imply an immune suppression. Ulinastatin can decrease the expression of Treg and Th17, inverses the ratio of Treg/Th17, and improve the expression of HLA-DR, so as to improve the prognosis of severe sepsis patients.
目的:探讨应用血必净注射液对严重烧伤患者休克期并发脓毒症的治疗效果。方法:依据脓毒症感染诊断标准,对44例严重烧伤患者休克期并发脓毒症的患者,随机分为2组,对照组22例给予常规治疗,治疗组22例,加用血必净注射液,疗程7日。分别观察2组患者治疗前后体温(T)、心率(HR)、白细胞计数(WBC)、中性粒细胞率、血小板记数(PLT)及病死率。结果:血必净注射液治疗后,治疗组的HR、WBC、PLT与对照组比较有显曹改善(Plt;005);病死率较对照组显著降低(Plt;001)。结论:烧伤后早期应用血必净注射液是防治休克期烧伤脓毒症的重要措施,对烧伤脓毒症起到早期保护组织、防治MODS的作用。
Objective To investigate the expression of oncostatin M (OSM) in patients with sepsis and its role in early recognition of sepsis. Methods Thirty-four patients with sepsis admitted in Shanxi Bethune Hospital fromJune 3, 2021 to January 18, 2022 were selected as a sepsis group, 15 patients with community acquired pneumonia (CAP) as a case control group, and 16 adults who underwent physical examination in the same period were selected as a healthy control group. The patients in the sepsis group were followed up for 28 days and divided into a survival group and a death group. The serum OSM level and its correlation with clinical indexes (white blood cell, neutrophil, lymphocyte, sequential organ failure assessment score and acute physiology and chronic health evaluation Ⅱ) were analyzed, and the diagnostic value of OSM expression level in the early identification of sepsis was analyzed. Results Compared with the case control group and the healthy control group, the expression level of OSM in the sepsis group was significantly higher [(502.07±209.93)pg/mL vs. (368.22±65.95)pg/mL and (382.09±73.04)pg/mL, P<0.05]. However, the high expression of OSM had no significant correlation with white blood cell, neutrophil, lymphocyte or disease severity score (P>0.05), and there was no significant difference in serum OSM level between the sepsis survival group and the death group. Compared with white blood cell count, the high expression of OSM has certain diagnostic value in the early identification of sepsis. The area under the receiver operator characteristic curve of OSM in predicting sepsis was 0.794 (95% confidence interval 0.666 - 0.922, P<0.05), with the sensitivity of 79.4% and the specificity of 73.3%. Conclusion The expression of OSM in patients with sepsis is significantly increased, and the high expression of OSM has a certain diagnostic value in the early identification of sepsis.
ObjectiveTo evaluate the clinical efficacy of fish oil containing lipid emulsion (FO) in sepsis. MethodsRandomized controlled trials about fish oil containing lipid emulsion in sepsis,which were published from 1980,were searched from the following electronic databases:PubMed,Embase,Foreign Medical Journal Service,Cochrane Library,CNKI,Wanfang Database,and VIP Database. The articles screening,quality assessment and data extraction were conducted by two reviewers independently. The methodological quality of trials was assessed by Jadad's scale. All data was analyzed by Review Manager 5.2 software. ResultsFifteen studies involving 794 participants met the inclusion criteria. The meta-analysis results were as follows:compared with the control group,①FO could shorten the length of ICU stay[WMD=-5.59,95%CI(-7.65,-3.53)] and the length of hospital stay[WMD=-10.48,95%CI(-14.67,-6.29)],and also decrease the 28-day mortality[RR=0.69,95%CI(0.52,0.93)]. ②FO could reduce the concentration of TNF-α[WMD=31.78,95%CI(5.63,57.92)] and improve oxygenation index[WMD=41.95,95%CI(30.80,53.11)] in septic patients. ③There was no statistical significance in the decrease of C-reactive protein (CRP) between two groups(P>0.05). ConclusionThe administration of FO in septic patients can significantly shorten the length of ICU stay and hospital stay,decrease the 28-day mortality,reduce the concentration of TNF-α and improve oxygenation index. However,it shows no significant difference in the decrease of CRP compared with the administration of traditional lipid emulsion. All of the above results show that the septic patients can benefit from the administration of fish oil containing lipid emulsion.
Objective To explore the possible anti-inflammatory mechanism of intensive insulin therapy （IIT） by studying the effect of IIT on the levels of TNF-α, IL-6, C-reactive protein （CRP） and APACHE Ⅱ score in biliary pyemia. Methods Twenty eight patients with biliary pyemia who were admitted by our department and given an operation within 24 h form Jan. 2005 to Dec. 2008 were randomly divided into two groups by using random number table numbers: one group treated with IIT （IIT group, n=14） and another group treated with routine insulin therapy （RIT group, n=14）. The inflammatory factors, such as TNF-α, IL-6 and CRP were detected dynamically and the APACHEⅡ score was calculated. ResultsThe level of CRP and APACHEⅡ score on day 5 and 7 and the levels of TNF-α and IL-6 on day 3, 5 and 7 after operation in IIT group were significantly lower than those in RIT group （P＜0.05, P＜0.0１）. Compared with preoperative levels, the IL-6 and APACHEⅡ score in IIT group commenced to decrease on day 3 after operation （P＜0.05）, that was earlier than control group. Conclusion The treatment with IIT can suppress the composition of TNF-α, IL-6 and CRP, protect impaired hepatic cells, and reduce APACHEⅡ score, the degree of systemic inflammation and incidence of MODS.