[Analysis of healthy life expectancy and related socioeconomic influencing factors among the middle-aged and elderly in China, the United States, and the European Union]

Objective: To calculate and compare the healthy life expectancy (HLE) of the middle-aged and elderly in China, the United States, and developing and developed countries in the European Union(EU) and analyze the impact of socioeconomic factors on HLE in different countries or regions. Methods: Four surveys from 2010 to 2019 were brought into the research. The data were collected from the China Health and Retirement Longitudinal Study, Health and Retirement Study, and the Survey of Health, Ageing and Retirement in Europe. Developed and developing countries in the EU were divided into two groups for calculation. Education level, total family wealth, and work retirement status were selected to measure socioeconomic status, and activities of daily living were used as health status indicators. We used the multi-state life cycle table method to calculate the transition probability between different health states and estimate life expectancy and HLE. Results: A total of 69 544 samples were included in the study. In terms of age, the middle-aged and elderly in the United States and developed countries of the EU have higher HLE in all age groups. In terms of gender, only Chinese women have lower HLE than men. Regarding socioeconomic factors, the middle-aged and elderly with higher education levels and total family wealth level have higher HLE. In China, working seniors have higher HLE, while for USA women and developed countries of the EU, retired or unemployed seniors have higher HLE. Conclusions: Demographic and socioeconomic factors impact HLE in different countries or regions. China should pay more attention to the health of women and the middle-aged and elderly retired with lower education and less total family wealth.

Study of the Structure and Properties of ZnS Utilized in a Fluorescence Biosensor

ZnS materials have been widely used in fluorescence biosensors to characterize different types of stem cells due to their excellent fluorescence effect. In this study, ZnS was prepared by vulcanizing nano-Zn particles synthesized using a DC arc plasma. The composition and structure of the ZnS materials were studied by X-ray diffraction (XRD), and their functional group information and optical properties were investigated by using IR spectrophotometry and UV-vis spectrophotometry. It has been found that the synthesized materials consist of Zn, cubic ZnS, and hexagonal ZnS according to the vulcanization parameters. Crystalline ZnS was gradually transformed from a cubic to a hexagonal structure, and the cycling properties first increase, then decrease with increasing sulfurization temperature. There is an optimal curing temperature giving the best cycling performance and specific capacity: the material sulfurized thereat mainly consists of cubic β-ZnS phase with a small quantity of Zn and hexagonal α-ZnS. The cubic phase ZnS has better conductivity than hexagonal ZnS, as evinced by electrochemical impedance spectroscopy (EIS). The ZnS (as prepared) shows board absorption, which can be used in fluorescence biosensors in cell imaging systems.

[Effect of continuous blood purification for acute renal injury after acute Stanford type A aortic dissection]

Objective: To investigate the effect of continuous renal replacement therapy (CRRT) on acute kidney injury (AKI) after acute Stanford type A aortic dissection (ATTAD). Methods: In this study, 120 patients with AKI after ATTAD surgery treat in Gansu Provincial People's Hospital were selected as research objects. Among them, there were 86 males (71.7%) and 34 females (28.3%) with a mean age of (55±5) years. These patients were randomly divided into experimental group (n=60) and control group (n=60) with stratified random sampling. CRRT and intermittent hemodialysis (IHD) were performed in the experimental group and the control group respectively. The therapeutic effect of CRRT on ATTAD patients with AKI was evaluated by blood purification index, renal function index, Sequential Organ Failure Assessment (SOFA) score, inflammatory level, hemodynamic index and fluid infusion volume. Results: The two treatment schemes both had considerable therapeutic effects on the condition of patients, but the therapeutic effect of CRRT was more superior. In the patients treated with CRRT, the levels of serium creatinine (SCr), blood urea nitrogen (BUN) and blood lactic acid (Lac) were all lower than those in the control group (all P<0.05). The time of staying in intensive care units (ICU), the period of oliguria, the times of renal replacement therapy, the time from the first dialysis to the last dialysis and the total hospital stay in the experimental group were all shorter than those in the control group (all P<0.05). The volume of fluid infusion was less and the hemodynamic index was better than that in the control group, but there was no significant difference in hospital mortality between the two groups (P>0.05). The levels of interleukin (IL)-6, IL-8 and C-reactive protein (CRP) in the experimental group were (21.9±1.8) ng/L, (18.6±1.4) ng/L and (22.7±2.2) mg/L, respectively, which were all significantly lower than those in control group ((27.9±3.2) ng/L, (28.3±1.4) ng/L, (60.1±2.5)mg/L, respectively; t=14.527, 13.255, 11.247, all P<0.05). The scores of SOFA at all time points in the experimental group were all lower than those in the control group (all P<0.05). Conclusion: Compared with IHD, CRRT brings no significant reduction in hospital mortality in patients with AKI after ATTAD, but shows better prognosis.

[Revision of Schatzker type Ⅵ tibial plateau fracture failure focus on the recovery of lower limb alignment]

Objective: To explore the influence of the lower extremity abnormal alignment and the joint surface, and to explore the surgical skills. Methods: Twenty-two cases of tibial plateau Schatzker Ⅵ fracture internal fixation failure revision from January 2012 to January 2017 in Department of Orthopedics, Shanghai 10(th) Hospital.One year follow-up after initial surgery to make sure of failure.Three-dimensional CT scan, radiography, infection index, gait analysis, knee joint ROM, femur tibia angle, tibial plateau tibial shaft angle and posterior slope if tibial plateau were observed. The medial approach and bi-planer osteotoma were used.Autogenous iliac bone graft, postoperative fast recovery channel were used.Follow-up point included preoperative and postoperative 7 days, 6 weeks, 3 months, and 6 months.Obvervational index included double lower limbs radiography, knee society score(KSS), complications such as infection, skin necrosis, joint main passive activity, double lower limbs alignment the last follow-up SF-36 scale.Rate was compared by χ(2) test, measurement data using paired sample t test.Correlation was analyzed by Pearson correlation regression testing. Results: Twenty-two patients received follow-up.KSS, more than 21 cases were benign, with good gait.One case was poor, with claudication gait.Not skin necrosis, no deep infection cases, 1 case get blisters 2 days postoperatively, and disappear after 5 days with detumescence and cold therapy.Whether restoring force line affect the KSS significantly(χ(2)=22.000, P=0.000). Knee joint ROM, SF-36 score, KSS and lower limb alignment were improved significantly. In different individual the articular surface and anatomical angle recovered greatly but the posterior slope angle was quite difference which has no correlation with KSS and SF-36 scale(P>0.01). Conclusions: Revision of Schatzker type Ⅵ tibial plateau fracture failure should focus on the recovery of lower limb alignment.moderate overcorrect bone cutting and joint surface height can bring benefits to the postoperative knee function.Revision surgery patients have greater psychological pressure, more early psychological intervention is necessary.

[The association between the prognosis and the localization and expressionof heparanase in human laryngeal squamous cell carcinoma]

Objective:The aim of this study is to explore the expression of heparanase(HPA) in human laryngeal squamous cell carcinoma and its correlation with the clinical pathologic features, such as clinical stage, T grade, lymph node metastasis and cellular differentiation. At the same time, to evaluate the relationship between heparanse localization and expression in human laryngeal squamous cell carcinoma (HLSCC) and tumor prognosis and patients survival. Method: The expression levels of HPA in HLSCC tissues of 73 cases and benign lesions of 38 cases(control) were detected via immunohistochemistry. The correlation of HPA expression with various clinical pathologic features was evaluated with single factor analysis.The Fisher exact test and chisquare tests were used to compare categorical data. Univariate survival was evaluated by KaplanMeier curves and tested using logrank test. Multivariate Cox proportionalhazards regression was used to evaluate independent prognostic factors associated with survival. Result: The positive expression rate of HPA in 73 HLSCC patients and benign lesions of 38 cases were 76.71%（56/73）and 21.05%（8/38）respectively（P<0.05）. The clinical pathologic analysis showed that HPA level had a relationship with the clinical stage, T grade, cellular differentiation and lymph node metastasis(P<0.05), while not with gender, age and clinical types(P>0.05). Survival analysis showed that the patients with high HPA expression had significantly poorer outcome as compared with the patients with low HPA expression. The medium survival time and the 5year survival rate were 24 months and 43.33% in highheparanase group, 56 months and 61.54% in the lowheparanase group and 65 months and 70.59% in the noneheparanse group(P=0.010). The survival was related to clinical stage, T grade, lymph node metastasis, and cellular differentiation(P<0.05), but not with age, sex and clinical types(P>0.05).In multivariate Cox proportionalhazards regression analysis, the results suggested that lymph node metastasis, hepanranase expression level and heparanase localization were independent prognosis factor for HLSCC. Moreover, hepanranase localization correlated with patient outcome. Kaplan Meier analysis demonstrated statistically significantly difference for 5-years overall survival rate between the patients with HPA nuclear staining and the patients with HPA cytoplasmic staining(P<0.05).Conclusion:HPA was related with worse overall survival and could be considered as a potential marker of poor prognosis. Cytoplasmic staining of heparanase inversely correlated with patients survival and predicts poor prognosis, whereas nuclear heparanase predicts a favourable outcome.

Micromechanical testing with microstrain resolution

Simple test equipment has been developed for studying the elastic limit and plastic deformation of thin metal wires and thin foils (down to 10 μm) under torsion, tension, and bending. Using load-unload methods and gauge lengths up to 1 m, plastic strain as low as 10(-6) can be measured accurately.