ABSTRACT
Objective To evaluate the validity and reliability of simplified Chinese SF-36v2 questionnaire for assessment of life quality of people immigrating to high altitude at different time periods.Methods Two hundred and forty-eight Chinese young males,aged 16-36 years (mean 22.1 years),immigrating to an altitude of 4520m plateau for 0.3-10.8 years (mean 2.3 years),were selected by cluster sampling methods.The general demographic characteristics questionnaire and simplified Chinese SF-36v2 scale were investigated by self-administered questionnaire.Thirty-four subjects were randomly sampled and re-examined by questionnaire after 4 weeks.Results A total of 252 questionnaires were sent out,and a total of 248 valid questionnaires (98.4％) were collected.The scores of 8 scales in SF-36v2,including physical function (PF),role-physical (RP),bodily pain (BP),general health (GH),vitality (VT),social function (SF),role-emotional (RE) and mental health (MH),were 78.50 ± 15.34,63.30 ± 39.65,70.60 ± 17.69,56.40 ± 18.21,59.10 ± 18.18,85.70 ± 18.90,53.68 ± 41.65,59.35 ± 13.61.The floor effects were 0 except for RP (17.80％) and RE (27.92％) and the ceiling effects were 5.08％,40.11％,3.55％,0,2.54％,9.64％,31.47％,0.The split half reliability of SF-36v2 scale was 0.632-0.800,and the Cranbach's coefficient of α was 0.641-0.824,the test-retest reliability coefficient was 0.543-0.848.The success rate of set validity was 100％,and the total discriminant validity success rate was 95.36％.Factor analysis was used to extract 2 principal factors,which could explain 69.5％ of the total variance.Conclusion The simplified Chinese SF-36v2 scale has good internal consistency,reliability and validity,and it can be used to assess the quality of life in different periods.
ABSTRACT
AIM: To observe the cardiac function during high-altitude exposure in Chongqing soldiers and to discuss its relationship with acute mountain sickness ( AMS ) by echocardiography .METHODS: The changes of heart function were evaluated during acute high-altitude exposure (3658 m, 3 d) in 42 healthy young male soldiers by echocar-diography.At the same time, the heart rate, blood pressure, blood oxygen saturation, and the incidence of AMS after high-altitude exposure were observed and recorded .RESULTS:Three days after arrival at 3658 m, the left atrial end-systolic dimension (LADs), left ventricular end-diastolic dimension (LVDd) and right atrial end-systolic dimension were signifi-cantly decreased , but the right ventricular outflow tract diameter , pulmonary artery dimension , ejection fraction , cardiac output (CO), pulmonary arterial systolic pressure (PASP) and mean pulmonary arterial pressure were significantly in-creased compared with the baseline levels in all subjects .The mitral peak E velocity was significantly reduced (P<0.05). A total of 42 healthy young men were recruited and divided into AMS group with 15 subjects and non-AMS group with 27 subjects by Lake Louise scoring after high-altitude exposure .The cardiac function in the plain showed that aortic sinus di-ameter and LVDd in AMS group were significantly smaller , and PASP was significantly higher than those in non-AMS group.After high-altitude exposure, the LADs in AMS group was significantly smaller than that in non-AMS group (P<0.05).AMS scores and CO in the plain showed significant negative correlation (r=-0.3814, P<0.05).CONCLU-SION:Upon acute high-altitude exposure , right ventricular functions of the young male soldiers are damaged with the com-pensation of the left ventricular functions .Using echocardiography to observe PASP and CO may be helpful for screening the susceptible people of AMS in the plain .
ABSTRACT
Objective To investigate the effects of plateau hypoxia environment on the physiology and biochemistry indicators of troops executing different combat mission.Methods Troops included the soldiers in camp (station altitude 4030m and 4600m) and those soldiers in field training (altitude 4300m) for one month.Blood samples were collected and the physiology and biochemistry indicators were detected including heart rate (HR),blood pressure (BP),oxygen saturation (SpO2) and the concentrations of hemoglobin (Hb),serum total protein (TP),albumin (ALB) and globulin (GLB),the ratio of albumin and globulin (A/G),concentrations of total cholesterol (TC),triglycerides (TG),high-density lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol (LDL-C),creatine kinase (CK),lactic dehydrogenase (LDH),aspartate aminotransferase (AST),alanine aminotransferase (ALT) and AST/ALT.Results The HR was significantly higher in soldiers of field training (82.25 ± 14.10 beats/min) than in soldiers stationed in camp (74.18 ± 9.02 beats/min,P＜0.01),while the oxygen saturation was obviously lower in the former (88.25％ ± 2.41％) than in the latter (89.38％ ± 2.44％,P＜0.05).The BP between the two groups showed no significant difference (P＞0.05).The concentration of Hb and the prevalence of plateau polycythemia were significantly higher in soldiers of field training (211.6 ± 17.4g/L and 55.6％) than in soldiers stationed in camp (199.3 ± 22.7g/L and 25.7％,P＜0.001).The concentrations of serum protein were both sufficient in the two groups.The prevalence of dyslipidemia was obviously higher in soldiers of field training (70.5％) than in soldiers stationed in camp (34.0％,P＜0.001),the concentration of HDL-C was significantly lower and the prevalence of low HDL-C blood disease was markedly higher in the former (0.81 ± 0.21nmol/L and 65.9％) than in the latter (1.01 ± 0.27nmol/L and 29.8％,P＜0.001).No significant differences were observed in the concentrations of TC,TG and LDL-C between the two groups (P＞0.05).The concentration of serum LDH was significantly higher and the abnormality rate of LDH was also higher in soldiers of field training (273.70 ± 136.74U/L and 72.7％) than in soldiers stationed in camp (205.19 ± 77.94 U/L and 51.1％,P＜0.01 and P＜0.05).Conclusions The protein nutrition in plateau soldiers is sufficient,but the prevalence of plateau polycythemia,dyslipidemia and the abnormality rate of LDH were higher in soldiers of field training than in soldiers stationed in camp.Regular physical examination should be taken into consideration,early prevention and treatment is also important.
ABSTRACT
Objective To explore the classification , strengths and weaknesses and military value of high altitude medical equipment.Methods Based on the currently-used high altitude medical equipment, we explored the characteristics of its tasks and altitude adaptability combined with the demand of high altitude health service support .Results The high altitude medical equipment is divided into three categories: high altitude general medical equipment , high altitude professional medical equipment and high altitude special-demand medical equipment .Conclusion The research and development strategies of high altitude medical equipment should be based on the domestic conditions , have priorities of research, develop high-altitude medical equipment systems based on basic equipment , main equipment and frontier high-tech special equipment .
ABSTRACT
Objective To explore the classification , strengths and weaknesses and military value of high altitude medical equipment.Methods Based on the currently-used high altitude medical equipment, we explored the characteristics of its tasks and altitude adaptability combined with the demand of high altitude health service support .Results The high altitude medical equipment is divided into three categories: high altitude general medical equipment , high altitude professional medical equipment and high altitude special-demand medical equipment .Conclusion The research and development strategies of high altitude medical equipment should be based on the domestic conditions , have priorities of research, develop high-altitude medical equipment systems based on basic equipment , main equipment and frontier high-tech special equipment .