中文摘要：

目的 了解长时间视频对作业人员球后动脉血流动力学的影响.方法 于2015年3至10月,选择某部队内勤视频监控作业战士120人作为研究组,另选择消防作业战士155人作为对照组,比较两组人员眼部不适症状发生率;应用彩色多普勒超声测量并比较两组研究对象的视网膜中央动脉（CRA）和睫状后短动脉（SPCA）的收缩期峰值血流速度（PSV）、舒张末期速度（EDV）以及阻力指数（RI）,分析视频作业时间与球后动脉血流动力学参数的相关性.结果 研究组眼部不适症状发生率明显高于对照组,差异均有统计学意义（P＜0.05）;与对照组比较,研究组CRA和SPCA的PSV、EDV值均明显降低,CRA的RI值明显增高,差异均有统计学意义（P＜0.05）;视频作业时间与CRA和SPCA的PSV、EDV值均呈负相关（r=-0.61、-0.54、-0.65、-0.68,P＜0.05）,与CRA和SPCA的RI值呈正相关（r=0.56、0.63,P＜0.05）.结论 长时间视频作业可增加作业者眼部不适症状的发生率,导致CRA和SPCA血流阻力增高、视网膜灌注减低.

英文摘要：

Objective To investigate the influence of long-time video operation on hemodynamics of the retrobulbar arteries in operators.Methods From March to October,2015,a total of 120 soldiers for office work engaged in video surveillance were enrolled as study group,and 155 fire fighters were enrolled as control group.The incidence of eye discomfort was compared between the two groups.Color Doppler ultrasound was used to measure and compare the peak systolic velocity （PSV）,end-diastolic velocity （EDV）,and resistance index （RI） of the central retinal artery （CRA） and the short posterior ciliary artery （SPCA）,and the correlation of video operation time with the hemodynamic parameters of the retrobulbar arteries was analyzed.Results The study group had a significantly higher incidence rate of eye discomfort than the control group （P〈0.05）.Compared with the control group,the study group had significant reductions in the PSV and EDV of the CRA and the SPCA and a significant increase in the RI of the CRA （P〈0.05）.Video operation time was negatively correlated with the PSV and EDV of the CRA and the SPCA （r=-0.61,-0.54,-0.65,and-0.68,all P〈0.05） and positively correlated with the RI of the CRA and the SPCA （r=0.56 and 0.63,P〈0.05）.Conclusion Long-time video operation can increase the incidence of eye discomfort and lead to increased blood resistance of the CRA and the SPCA and reduced retinal perfusion.