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OBJECTIVE: To comprehend the status of knowledge-attitude-practice( KAP) and its effect on blood lead in workers exposed to lead.METHODS: Three hundred and fifty-one first-line lead exposed workers in the smelting industry were chosen as study subjects by cluster sampling method.Blood lead levels in peripheral venous blood were detected.Questionnaire survey was conducted by self-compiled Questionnaire of Knowledge-attitude-practice on Occupational Health in Lead Workers.RESULTS: Among the study subjects,145 workers had abnormal blood lead level( ≥600 μg/L),the abnormal rate was 41.3%.The correct scoring rate in occupational knowledge,attitude,and practice were 25.1%,45.3% and 15.7%,respectively.Multivariate logistic regression analysis results showed that the four risk factors of high blood lead level were wearing no personal protective equipment,not bathing and changing clothes before returning home,not gargling and washing hands before meals,smoking and eating in workplace.CONCLUSION: Poor occupational behaviors can increase the risk of high blood lead level in lead exposed workers.
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Objective@#To investigate the relationship between occupational stress and working ability of workers in a petroleum processing enterprise in a high altitude area.@*Methods@#A total of 728 workers in a petroleum processing enterprise at an altitude of 2850 m were subjected to a survey using Occupational Stress Inventory (OSI) , Work Ability Index (WAI) Scale, Occupational Role Questionnaire (ORQ) , Personal Strain Questionnaire (PSQ) , and Personal Resource Questionnaire (PRQ) from May 2014 to August 2016.@*Results@#Of the 728 workers, 55 (7.6%) had a poor working ability, moderate in 262 (35.9%) , and good in 411 (56.5%). There were significant differences in WAI between the workers with different types of work, sexes, ages, and working years (P<0.05). There was a significant difference in WAI between different occupational stress groups (P<0.05). WAI was negatively correlated with ORQ score and PSQ score (rs=-0.387, P<0.05; rs=-0.467, P<0.05) and positively correlated with PRQ score (rs=0.343, P<0.05). The multiple linear regression analysis showed that high ORQ score and PSQ score were the inhibitory factors for high WAI (B=-0.058; B=-0.082) and high PRQ score was a contributing factor for high WAI (B=0.029) .@*Conclusion@#Occupational stress is an influencing factor for the working ability of workers in the petroleum processing enterprise in the high altitude area. Hypoxia in high altitude area may further reduce the working ability. In order to reduce occupational stress and improve work ability, it should be considered to strengthen skills training, improve the working environment, and pay attention to mental health.
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Purpose To explore the predictive value of myocardial perfusion in assessing myocardial systolic function recovery after primary percutaneous coronary intervention (PPCI),in order to improve poor prognosis by early detection of myocardial no-reflow.Materials and Methods Forty nine patients with acute myocardial infarction (AMI) who had received PPCI were chosen as subjects.All the patients underwent two-dimensional strain (2DS) images and resting real-time myocardial contrast echocardiography (MCE) within one week after surgery,and 2DS measurement was repeated after three months.2DS imaging was used to acquire longitudinal peak systolic strain (LPSS) at all myocardial segments.Based on the graphs of LPSS,left ventricular myocardium was divided into normal contractile function myocardium (red) and impaired contractile function myocardium (light red,blue).According to the myocardial perfusion scores (MPS) qualitatively assessed by MCE visual interpretation,the myocardia with impaired systolic function were categorized into three groups with different perfusion level.The changes of LPSS within one week and three months after surgery (△ LPSS) among the three groups were analyzed.The correlation between MPS and LPSS within one week and three months after PPCI was also analyzed respectively.Results The △ LPSS increased significantly among the three groups with the improvement of myocardial perfusion level [(-5.78±6.23)％ vs.(-4.37±6.60)％ vs.(-1.21 ±4.77)％,all P＜0.05].The MPS measured one week after PPCI was both positively correlated with the LPSS detected within one week after surgery and that after three months (r=0.47,0.58,P＜0.001).The consistence of myocardial perfusion scores given by two evaluators was good (Kappa=0.785,P＜0.05).Conclusion The level of myocardial perfusion after PPCI in patients with AMI is closely related to regional myocardial systolic function,and the improvement of myocardial perfusion can forecast the recovery of regional systolic function.
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OBJECTIVE: To explore the relationship between metabolic syndrome( MS) and occupational stress among workers in high altitude area. METHODS: A cross-sectional study was conducted in 940 workers as research subjects who were engaged in petroleum smelting,thermal power generation and financial management et al. in high altitude area. A questionnaire survey was conducted using the Occupational Stress Inventory-Revised for occupational stress, The occupational health examination was performed to measure waist circumference,blood pressure,blood sugar and blood lipids. RESULTS: The abnormal rates in obesity,triglycerides,high-density lipoprotein,blood pressure and fasting blood glucose were 28. 3%,16. 3%,14. 3%,13. 3% and 6. 5%, respectively. The detection rate of MS was 5. 0%( 47/940). The multivariate logistic regression analysis showed that the risk of elevated MS decreased with the increased of occupational stress level( P < 0. 05),and the risk of elevated MS increased with the increased of occupational stress reaction severity( P < 0. 05),after adjusting the confounding factors of gender and labor nature. CONCLUSION: The higher occupational stress reaction of the workers in high altitude area,the higher the risk of MS.
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Objective To evaluated the value of myocardial perfusion before delayed percutaneous coronary intervention (PCI) for predicting the recovery of systolic function of patients with acute myocardial infarction (AMI).Methods A total of 64 patients with AMI receiving delayed PCI treatment in the First People's Hospital of Foshan from January 2014 to June 2015 were selected.One day prior to delayed PCI,all of the patients underwent two dimensional strain to measure the longitudinal peak systolic strain (LPSS) of each left ventricular segment and the global longitudinal strain (GLS) of the left ventricle.The myocardial perfusion score (MPS) and the perfusion score index (PSI) were measured by myocardial contrast echocardiography (MCE).Left ventricular myocardial perfusions were classified as good,reduced,or absent.The two dimensional strain measurements were again conducted at 6 months after the delayed PCI to assess LPSS and GLS.The change of GLS and LPSS between one day prior to delayed PCI and six months after delayed PCI was assessed by paired t-test.The differences of LPSS among good,reduced,or absent myocardial perfusion groups were analyzed by one-way ANOVA.LSD-t test was used to compare in pairs of groups that had different values.The correlations between PSI and GLS,MPS and LPSS were assessed by Spearman's rank-correlation test.Results The GLS of all patients were higher at six months after delayed PCI than at one day prior to delayed PCI [(-15.39±7.80)％ vs (-12.44±8.38)％,t=14.398,P ＜ 0.001].The LPSS of myocardial perfusion in good,reduced and absent groups at one day prior to delayed PCI were (-2.64±5.60)％,(-6.19±6.87)％ and (-12.07±5.86)％,respectively.The LPSS of myocardial perfusion in good,reduced and absent groups at six months after delayed PCI were (-2.97 ± 4.93)％,(-11.38± 7.26)％ and (-15.82 ± 5.97)％,respectively.The myocardial LPSS of left ventricular segment with good or reduced perfusion was significantly higher at six months after delayed PCI (t=13.013,10.821,both P ＜ 0.001),but the LPSS of left ventricular segment with absent perfusion was similar to that of pre-PCI.Whether at one day prior to delayed PCI or six months after delayed PCI,there were significant differences in LPSS parameters among the three groups (at one day prior to delayed PCI,myocardial perfusion absent vs reduced or good,t=4.201 and 11.771,both P ＜ 0.001;myocardial perfusion reduced vs good,t=12.561,P ＜ 0.001;at six months after delayed PCI,myocardial perfusion absent vs reduced or good,t=9.714 and 15.646,both P ＜ 0.001;myocardial perfusion reduced vs good,t=9.254,P ＜ 0.001).The LPSS both at one day prior to delayed PCI and six months after delayed PCI in myocardial perfusion good group ＞ those of myocardial perfusion reduced group ＞ those of myocardial perfusion absent group.PSI was positively correlated with GLS at both one day prior to delayed PCI and six months after delayed PCI (r=0.69,0.72,both P ＜ 0.001).MPS was positively correlated with LPSS at both one day prior to delayed PCI and six months after delayed PCI (r=0.49 and 0.45,both P ＜ 0.001).Conclusion Myocardial perfusion before delayed PCI,monitored by MCE,is correlated well with myocardial systolic function,and may be used to predict the recovery of myocardial systolic function after delayed PCI.