480m氦氧饱和模拟潜水对潜水员作业能力的影响

目的 研究大深度饱和潜水对潜水员作业能力的影响.方法 采用操作能力、认知能力及眼动反应3类指标对4名潜水员在480 m氦氧饱和模拟潜水实验前后作业能力进行评价.结果 实验前后,潜水员操作能力指标无显著差异；认知能力指标中,反应时无显著差异；实验后,运动时[(190.25 ±44.96)×-3s]显著缩短(P =0.047),时间知觉的正确率[(73.75±3.86)％]显著提高(P=0.044),眼动潜伏期[(764.38±17.77) ×10-6s]显著延长(P=0.044),平均注视时间缩短接近显著水平(P =0.064).结论 大深度暴露对潜水员神经传导可能产生促进作用,需进行深入研究.本次模拟潜水实验所设定的深度-时程对潜水员作业能力的影响较小,未产生明显的损害.

Effects of the 480 m simulated helium-oxygen saturation diving on the diver's performance

Objective To study the effects of deep helium-oxygen saturation diving on the diver's performance.Methods Operational pedormance of the 4 divers was evaluated before and after the 480 m simulated helium-oxygen saturation dive through the access of manipulation,cognitive performance and eye movement.Results No significant differences in the diver＇s performance could be detected before and after the experiment.Concerning the indices of the diverr＇s cognitive performance,significant differences could neither be seen in reaction time,while movement time was obviously shortened[(190.25 ± 44.96) × 10-3 s](P =0.047 ) and accuracy of time perception was greatly improved[(73.75 ± 3.86)％ ](P =0.044).At the same time,average visual fixation time was obviously shortened ( P =0.064) and latency of eye movement was significantly prolonged[ (764.38 ± 17.77 ) × 10-6s ](P =0.044 ) following the dive.Conclusions Deep simulated saturation dive exposure might accelerate nerve transmission,the mechanism of which required further investigation.The depth-time course set by this simulated dive had little effect on the diver's performance,resulting in no obvious damage to the divers.