Objective To analyze the epidemiological characteristics of reported emergency public health events at schools from 2006 to 2013, and provide a scientific basis for better disposal of school-related events. Methods The reported emergency public health events at schools in Tianjin from 2006 to 2013 were collected, and descriptive epidemiological analysis was conducted on data. Results A total of 267 reported emergency public health events at school in Tianjin during 2006-2013, of which 257 infectious disease events, accounting for 96.25%. The incident occurred in primary schools and nurseries. The peak was from March to June and October to December for the incident. The top three species of disease onset were influenza (2 360 cases), chicken pox (2 032 cases) and mumps (1 813 cases). There was a correlation between the duration and interval from onset of the first case to report of emergency public health events(rs=0.522,P＜0.05). Conclusion In recent years, school public health emergency events are high momentum, mainly in rural areas, primary schools and nurseries. Timely detection and disposal of emergency public health events can reduce the harm generated by them.

Objective To investigate the expression of stromal cell-derived factor-1(SDF-1)and its clinical significance in blood plasma of patients with breast tumor.Methods The level of SDF-1 protein was examined by enzyme linked immunosorbent assay(ELISA)in blood plasma of 26 patients with breast benign tumor and 52 patients with breast cancer.Results The SDF-1 protein in blood plasma was detected in both breast benign tumor patients and breast cancer ones.The level of SDF-1 protein in patients with breast cancer was higher than that in ones with breast benign tumor,and there was a statistical difference between them(P=0.000).In patients with breast cancer,the level of SDF-1 protein in axillary lymph node(ALN)metastasis positive patients was significantly higher than that in ALN metastasis negative ones(P=0.036).Conclusion The level of SDF-1 protein in blood plasma may be a specific tumor marker.Its level is correlated with lymph node involvement in breast cancer.

Objective:To explore the effect of mild cognitive impairment on the subjective well-being of the elderly and the mediating role of self-efficacy in it. To provide an effective basis for health management and clinical intervention in the elderly with mild cognitive impairment.Methods:A total of 164 patients with mild cognitive impairment from December 2018 to June 2019 were surveyed by the General Self-efficacy Scale, the Montreal Cognitive Assessment Scale, and the Memorial University of Newfoundland Scale of Happiness Scale.Results:The overall score of self-efficacy was 21.41±3.98, and subjective well-being was 26.44±7.35. There was a positive correlation among cognitive function, self-efficacy and subjective well-being, except that there was no significant correlation between self-efficacy and cognitive function( r values were 0.263-0.687, P<0.01). Self-efficacy played a part in mediating between cognitive function and subjective well-being in patients with mild cognitive impairment, accounting for 37.8% of the total effect. Conclusions:Mild cognitive impairment can also have a negative impact on the subjective well-being of the elderly. Among them, self-efficacy plays a particularly important role in mediating. Interventions about self-efficacy on the elderly with mild cognitive impairment may have more significant effects.

Objective:To explore the influence of mindfulness meditation intervention on the professional identity and turnover tendency of the second victim of nurses.Methods:The convenience sampling method was used to select the second victim of 46 nurses who experienced medical adverse events within six months from January to June 2019 in Zhongnan Hospital of Wuhan University, and then an 8 weeks of mindfulness meditation intervention was carried out for them. In the entire intervention process, a self-control study was conducted, the Second Victim Experience and Support Scale (SVSET) and the Nurse Occupational Identity Scale were used to assess nurses' turnover intentions, absence and professional identity before the intervention and at 2 hours, 4 weeks, and 8 weeks after the intervention.Results:By analyzing the data, the results showed that after the mindfulness meditation intervention, the second victim of the nurse before intervention, 2h, 4 weeks, and 8 weeks of intervention were 3.28±0.87, 3.20±0.83, 2.85±0.92, 2.71±0.87, the difference was statistically significant ( F time value was 6.609, P<0.05). Before and after the intervention of the sense of grasp in professional identity were 4.91±0.83, 5.47±0.81, 5.83±0.91, 5.94±0.80, the difference was statistically significant ( F time value was 20.973, P<0.01). Consensus before and after intervention were 4.61±0.78, 5.09±0.85, 5.54±1.12, 5.76±0.85, the difference was statistically significant ( F time value was 22.237, P<0.01). The meaningful sense before and after intervention were 4.38±1.03, 5.04±0.75, 5.44±0.86, 5.59±0.76, the difference was statistically significant ( F time value was 23.656, P<0.01). The self-efficacy before and after intervention were 4.71±0.82, 5.33±0.63, 5.83±0.84, 5.90±0.77, the difference was statistically significant ( F time value was 28.866, P<0.01). The self-determination before and after intervention were 4.43±0.97, 5.06±0.81, 5.59±0.91, 5.62±0.87, the difference was statistically significant ( F time value was 25.237, P<0.01). Before and after intervention, the influence of tissue was 4.17±0.96, 4.71±0.85, 4.96±0.99, 5.30±0.88, the difference was statistically significant ( F time value was 16.487, P<0.01). Before and after intervention, the patients' feelings were 4.59±0.96, 5.08±0.84, 5.70±0.83, 5.83±0.68, the difference was statistically significant ( F time value was 25.406, P<0.01). Conclusion:This article provides an effective method to help nurses' second victims out of their predicament which confirms that mindfulness meditation intervention can effectively reduce turnover tendency of nurses 'second victims and improve their professional identity.

Objective To investigate the protect effects of Edaravone(Ed)and GM1 on the rat model of parkinson disease(PD).Methods To establish the unilateral PD rat model,6-OHDA was injected at two points of right substantial nigra pars compacta(SNC),ventral tegmental area(VTA),then the old rats were randomly divided into normal,NS,PD,PD + GMI,PD + Ed,FD + GM1 + Ed six groups.14d later,a rotational test induced by apomorphine was performed to determine the successful ratio.Cell apoptosis in SNC of rats were examined by TUNEL methods.Results Normal and NS groups unappeared rotate action by APO,and have no cell apoptosis in SNC.The other groups all appear rotate action(＞7 r/min)by APO,rotate action were in following gradation:PD +GM1 + Ed group(8.0±0.3)＜PD + Ed group(12.0±0.6)＜PD + GM1 group(17.0±1.0)＜PD group(23.0±1.3)(P＜0.01);and cell apoptosis in SNC were in following gradation:PD + GM1 + Ed group(27.63±2.38)＜PD + Ed group(38.42±3.54)＜PD + GM1 group(49.36±3.12)＜PD group(62.61±4.03)(P＜0.01).Conclusion 6-OHDA could induce change of action of rat and cell apoptosis in SNC.GM1,Ed reduce significantly the effect induced by 6-OHDA.GM1 combining with Ed have the best effects.

Objective To evaluate the clinical and radiological results of locking plate for treatment of proximal humerus frac‐tures and the efficacy of anatomical healing of tuberosities .Methods A total of 57 patients with proximal humerus fractures were treated with locking‐plate from July 2008 to March 2012 .A standardized radiological evaluation was conducted .Patients were divid‐ed into two groups :group A (anatomical healing of tuberosities) with 31 cases and group B (without anatomical healing of tuberosi‐ties) with 26 cases .Clinical assessment was performed using the Neer rating scale .Results Considering the entire sample ,the mean Neer score was 87 .96 ± 5 .06 points ,the excellent rate was 94 .74℅ .Comparing these parameters in the two groups ,group A was significant higher in the Neer scores and the range of movement than that of group B (P<0 .05) ,there was no statistic differences in the scores of pain and function (P>0 .05) .Conclusion the locing plate for treatment of complex proximal humerus fractures has a high subjective satisfaction rate .A good functional result depends on anatomical reestablishment of proximal humerus anatomy , particularly the healing of the greater tuberosity .

ObjectiveTo investigate the relationship between fractional exhaled nitric oxide (FeNO) and bronchopulmonary dysplasia (BPD) in extremely/very low birth weight infant (ELBWI/VLBWI). MethodsThirty-five ELBWI/VLBWI (gestational age <34 weeks at birth and birth weight <1 500 g), who were admitted to neonatal intensive care unit of Peking University Third Hospital from October 2014 to March 2015 with respiratory distress soon after birth, were enrolled into the study, and divided into BPD group (n=11) and non-BPD group 1 (n=24) according to the diagnosis at discharge. One day before they left the hospital, FeNO level was determined with Exhalyzer D, an equipment for pulmonary function test. Difference of FeNO and nitric oxide (NO) production between the two groups was compared witht-test or Fisher exact test, and the value of FeNO in predicting BPD was tested by receiver-operating characteristic (ROC) curve.ResultsThe mean gestational age at birth in BPD group was significantly less than that in non-BPD group [(29.7±1.9) vs (32.0±1.5) weeks,t=4.005,P=0.000], and the duration of invasive ventilation [(53.0±91.3) vs (15.0±30.2) h, t=1.598,P=0.002] and oxygenation was longer [(42.1±7.8) vs (8.2±6.4) d,t=13.567,P=0.000]. There were more babies required surfactant treatment, prenatal cortisone administration, and inhalation of cortisone and bronchodilator during hospital stay in BPD group than in non-BPD group[10/11 vs 38%(9/24), 11/11 vs 58%(14/24) and 11/11 vs 21%(5/24), Fisher exact test, allP<0.05]. The age and body weight of the babies at the time of FeNO determination in BPD group were older or higher than those in non-BPD group [(46.4±16.3) vs (20.9±11.7) d,t=5.278,P=0.000; (2 090±164) vs (1 892±153) g,t=3.498,P=0.001], but the corrected gestational age was similar [(36.3±3.1) vs (35.0±2.3) weeks,t=1.407,P=0.169]. Both the mean FeNO level and NO production in BPD group were significantly higher than those in non-BPD group [(13.6±6.9) vs (8.0±3.6) ppb (1 ppb=1×10-9 mol/L), (25.6±10.1) vs (18.1±9.0) nl/min,t=2.967 and 2.478,P=0.006 and 0.018]. The area under the ROC curve was 0.749 (P=0.021, 95%CI: 0.539-0.953) which implied that FeNO provided medium power for discrimination of ELBWI/VLBWI with BPD from those without, with a sensitivity of 72.7% and specificity of 75.0% at the cut-off value of 11.55 ppb.ConclusionsFeNO and NO production in BPD infants are significantly higher than non-BPD infants. Measurement of FeNO for ELBWI/VLBWI through mask before discharge is a simple, safe and invasive procedure to objectively evaluate pulmonary function early after birth.

BACKGROUND:Cirrhosis is a long-term consequence of chronic hepatic injury, which has no effective therapy. Mesenchymal stem cels have been shown to play a potential role in the treatment of liver fibrosis/cirrhosis. OBJECTIVE:To investigate the therapeutic effect and mechanism of human umbilical cord-derived mesenchymal stem cels on CCl4 induced liver fibrosis/cirrhosis in rats. METHODS:A CCl4-induced liver fibrotic/cirrhotic rat model was used, and human umbilical cord-derived mesenchymal stem cels were injectedvia the tail vein after modeling. Liver biochemical profile was measured by Beckman Coulter analyzer. Histopathological changes were assessed by Sirius red staining. The expressions of colagen type I, colagen type III, matrix metaloproteinases-2 and tissue inhibitor of matrix metaloproteinases-2 protein and mRNA in liver tissues were observed by immunohistochemistry, western blot and real-time PCR, respectively. RESULTS AND CONCLUSION:Liver biochemical profile indicated the transplantation of human umbilical cord-derived mesenchymal stem cels could improve the liver function of rats with liver fibrosis and cirrhosis. After cel transplantation, except 1-week cel transplantation group, the expressions of the matrix metaloproteinases-2 mRNA and protein were significantly increased, while the expressions of colagen type I, colagen type III and tissue inhibitor of matrix metaloproteinases-2 mRNA and protein significantly decreased, compared with the corresponding model groups. Human umbilical cord-derived mesenchymal stem cels play a role in the treatment of liver fibrosis and cirrhosis through upregulating the expression of matrix metaloproteinases-2 and lowering the expression of inhibitor of matrix metaloproteinases-2. With the continued presence of pathogenic factors, human umbilical cord-derived mesenchymal stem cel transplantation cannot reverse liver fibrosis or cirrhosis, and only delay the process of liver fibrosis or cirrhosis.

Objective To study the influence of Qingzao Runfei Huazhuo Xingxue decoction on pulmonary tissue and lung function in mouse model of lung injury induced by PM2.5, and to provide an idea of clinical prevention and treatment of respiratory diseases induced by PM2.5. Methods Totally 30 clean level male ICR mice were randomly divided into three groups: normal control group, model group and Qingzao Runfei Huazhuo Xingxue decoction intervention group, with 10 mice in each group. Model of PM2.5-induced respiratory disease in mice was reproduced by instilling nasal cavity drip PM2.5 suspension 40 mg/kg once a day for 6 weeks. In the treatment group, the mice were fed with the Qingzao Runfei Huazhuo Xingxue decoction twice a day from the 4th week of instilling PM2.5 suspension until the end of experiment. In the normal control group, the mice were fed as usual. At the end of the experiment, the total protein content in bronchoalveolar lavage fluid (BALF), and lung wet/dry weight (W/D) ratio was determined. Hematoxylin-eosin (HE) staining was used to observe the histopathological changes in lung tissue under light microscope. The inflammatory mediators levels in lung tissue were determined by antibody-sandwich enzyme linked immunosorbent assay (ELISA). Results Respiratory system damage model was successfully reproduced by dripping of PM2.5 suspension in nasal cavity. Compared with normal control group, inflammatory changes and inflammatory cell infiltration in model group were significant, and lung W/D ratio (4.71±0.33 vs. 3.13±0.12), total protein content in BALF (mg/L: 363.98±18.24 vs. 82.13±12.78), tumor necrosis factor-α [TNF-α (ng/L): 185.72±0.23 vs. 31.03±0.16], interleukin-8 [IL-8 (ng/L): 531.85±37.83 vs. 72.64±16.72], and leukotriene B4 [LTB4 (ng/L): 931.74±48.64 vs. 483.81±41.74] in lung tissue were significantly increased (all P < 0.05). Compared with the model group, the inflammatory changes of lung tissue in Qingzao Runfei Huazhuo Xingxue decoction intervention group were significantly reduced, lung W/D ratio (3.92±0.41 vs. 4.71±0.33), total protein content in BALF (mg/L: 213.21±19.62 vs. 363.98±18.24), TNF-α (ng/L: 124.15±0.27 vs. 185.72±0.23), IL-8 (ng/L: 238.42±35.82 vs. 531.85±37.83) and LTB4 (ng/L: 582.85±31.00 vs. 931.74±48.64) levels in lung tissue in Qingzao Runfei Huazhuo Xingxue decoction intervention group were significantly decreased (all P < 0.05). Conclusion Qingzao Runfei Huazhuo Xingxue decoction can improve PM2.5-induced damage and pathological inflammatory changes in lung tissue, which provided some new ideas for the treatment of PM2.5-induced respiratory diseases.

Objective To find a more suitable approach for the application of tranexamic acid(TXA)on total knee arthroplas‐ty (TKA) .Methods Totally 60 patients who met the inclusion criteria from January 2014 to August 2015 in the First Affiliated Hospital of Shihezi University were selected and divided into two groups according to the different route of administration .Group A (n=30) was intravenously injected with 100 mL TXA ,and group B(n=30) was locally injected with 100 mL TXA .Three hours drainage tubes occlusion were carried out after operation in the two groups .The intraoperative and postoperative dominant blood loss ,hidden blood loss indexes and the amount of total blood loss were recorded ,and coagulation indexes and D‐2 polymer were reg‐ularly monitored ,the incidence of thrombosis and postoperative adverse events were also observed .Results The amount of total blood loss in group B[(895 .41 ± 239 .02)mL] was lower than that in group A[(1 020 .89 ± 210 .83)mL] ,and the difference was statistically significant (P<0 .05);the total drainage volume in group B[(294 .33 ± 54 .25) mL] was lower than that in group A [(373 .33 ± 48 .02)mL] ,and the difference was statistically significant (P<0 .05) .After operation ,there was no significant differ‐ence between the two groups in coagulation indexes ,D‐2 polymer and the amount of hidden blood loss (P>0 .05) .No blood trans‐fusion ,symptomatic deep venous thrombosis and fatal pulmonary embolism occurred in the two groups .Conclusion The hemostatic effect of local application of TXA is better than that of intravenous injection in patients′initial TKA .