慢性缺氧与暗适应

RELATIONSHIP BETWEEN CHRONIC HYPOXIA AND DARK VISUAL AT HIGH ALTITUDE

探讨机体持续性慢性缺氧对人光觉系统的影响及可逆性程度 ;方法 :采用暗房夜光表测验法[1 ] ,对驻守在海拔 5 380m 6个月的 46名健康青年官兵现场进行吸氧 1 5分钟前后的暗适应检测 ;结果 :吸氧 1 5分钟后暗适应时间较吸氧前显著缩短 (P <0 .0 1 ) ;结论 :海拔 5 380m持续性慢性缺氧 6个月光感系统可发生功能性的改变 ,暗适应时间延长 ,供氧后光觉功能在短时间内迅速恢复至平原水平。

To study the effects of chronic hypoxia on visual sens system at high altitude.Methods:46 soldier,exposed high altitude(5 300m) for 6 months,were examined on dark visual before and after inspiring oxygen for 15 minutes.Results:The time of dark visual after inspiring oxygen was shorter significantly than before that (P<0.01).Conclusion:Chronic hypoxia can led to a functional change of dark visual in youths but it quickly recover after inspiring oxygen.