排序方式: 共有33条查询结果,搜索用时 15 毫秒
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目的 探讨视觉疲劳综合防护措施对空军某地面雷达操纵人员视觉疲劳的防护效果.方法 以首都空军某部队雷达操纵人员共30例为对象,在应用视觉疲劳防护措施前后分别进行临界闪光融合频率(CFF)检测、眼部视力、结膜炎等不适症状检查.视觉防护措施效果观察采用主观评价问卷调查和眼部检查,并进行前后对比分析.结果 综合防护措施防护后,除眼睑沉重和眼睛干涩外,眼睛酸胀、眼痛、流泪、畏光、充血、视物模糊、视力下降和结膜炎等眼部不适症状较防护前明显减轻,差异有统计学意义(P<0.01);视觉防护措施应用前后,CFF的差异亦有统计学意义(t=3.499.P<0.01).结论 视觉疲劳综合防护措施对首都空军雷达操纵人员视觉疲劳具有明显的防护效果. 相似文献
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Objective To investigate the circadian changes of heart rate (HR) and heart rate variability (HRV) on radar operators in day and night shifts. Methods Twenty-one military radar operators were selected as subject. Their HR was gotten from continually electrocardiogram recorded by a biomedical monitoring system in four different working shifts (morning, afternoon, early night and late night) and HRV was analyzed. In addition, each shift was divided into four phases and the average HR of different phases in same shift was compared. Results There was significant difference of average HR among four shifts (F=7. 287, P<0.01). The average HR in late night was significantly lower than that in other three shifts. Comparing with morning and afternoon shifts, high frequency normalized unit (HFNU) in late night shift was significantly increased (P<0.05). Low frequency normalized unit (LFNU) in late night shift was significantly decreased comparing with those in morning and afternoon shifts (P<0. 05). The average HR in different phase of a shift showed significant differences among morning, afternoon and early night shifts (F= 5. 480, 3. 150, 3. 850,P<0. 05 or P<0. 01), and gradually decreased with working time. However, there was no significant difference of average HR in different working phase of late night shift. Conclusions Circadian change would significantly influence the HR and some HRV indices of military radar operators. 相似文献
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目的评价2型糖尿病患者同型半胱氨酸(HCY)水平对血脂及心肌功能的影响。方法选择2014年1~10月到该院内分泌科住院的男性2型糖尿病患者140例,分别检测脂代谢功能[三酰甘油(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)]、心肌功能[磷酸肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)、乳酸脱氢酶(LDH)、肌红蛋白(MYO)]及HCY,依据HCY水平(14μmol/L为临界值)将其分为正常组(72例)和增高组(68例)。结果两组患者心肌功能比较差异有统计学意义(F=15.78,P0.01),脂代谢功能比较差异也有统计学意义(F=3.18,P=0.03),但影响不明显(Pillai跟踪值为0.65;Hotelling跟踪值为0.70)。结论高HCY水平对心肌功能存在影响,但对患者脂代谢影响有限。 相似文献
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目的了解尿路感染大肠埃希菌的耐药现状,为临床合理使用抗菌药物提供试验依据。方法对该院泌尿系感染者分离出348株病原菌进行鉴定和体外药物敏感试验,采用法国生物梅里埃公司ATB鉴定系统对菌株进行鉴定,采用纸片扩散法(K-B)进行抗菌药敏感性试验。结果医院尿路感染标本分离的大肠埃希菌对常用抗菌药物表现出不同程度的耐药性,大肠埃希菌对碳青霉烯类抗菌药物亚胺培南和美洛培南敏感率为100.0%;对氨苄西林、头孢唑林、头孢呋辛和哌拉西林耐药率较高;对氟喹诺酮类抗菌药物环丙沙星、左氧氟沙星耐药率也大于60.0%。结论大肠埃希菌耐药率呈逐年上升趋势;临床应该重视病原菌的培养和药物敏感试验,根据药敏结果合理应用抗菌药物。 相似文献
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目的 探讨视觉疲劳综合防护措施对空军某地面雷达操纵人员视觉疲劳的防护效果.方法 以首都空军某部队雷达操纵人员共30例为对象,在应用视觉疲劳防护措施前后分别进行临界闪光融合频率(CFF)检测、眼部视力、结膜炎等不适症状检查.视觉防护措施效果观察采用主观评价问卷调查和眼部检查,并进行前后对比分析.结果 综合防护措施防护后,除眼睑沉重和眼睛干涩外,眼睛酸胀、眼痛、流泪、畏光、充血、视物模糊、视力下降和结膜炎等眼部不适症状较防护前明显减轻,差异有统计学意义(P<0.01);视觉防护措施应用前后,CFF的差异亦有统计学意义(t=3.499.P<0.01).结论 视觉疲劳综合防护措施对首都空军雷达操纵人员视觉疲劳具有明显的防护效果. 相似文献
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目的 观察体外培养的正常猪视网膜色素上皮 (RPE)细胞中游离钙。方法 培养猪RPE细胞后 ,用激光扫描共聚焦显微镜 (LSCM)观察细胞中游离钙的分布特点 ,并通过校正求得游离钙的绝对值。结果 猪RPE细胞中游离钙的分布特点是细胞核较细胞浆中浓度高 ,通过校正求得细胞中游离钙平均值为 ( 2 2 0 .3 7± 2 7.3 5 )nmol/L。结论 用LSCM能直接观察培养的RPE细胞内游离钙的分布 ,并可求得胞内游离钙的平均绝对值 相似文献