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目的 研究急性低压缺氧对人的感知觉能力的影响。 方法 用低压舱模拟２ ８００ ｍ 、３ ６００ ｍ 、４ ４００ ｍ 三个高度的急性缺氧暴露１ ｈ，考察１８ 名健康男性青年对长度判断、图案比较、数字检索等测验绩效的变化。 结果 以３００ ｍ 高度所测参数作为正常对照值，２ ８００ ｍ 缺氧暴露１ ｈ，长度判断的综合绩效已低于对照值（Ｐ＜ ０．０５），３ ６００ ｍ 暴露１ ｈ 各项测验的反应时间明显延长（Ｐ＜ ０．０１），综合绩效显著降低。但图案比较和数字检索测验的错误率无显著改变（Ｐ＞ ０．０５），４ ４００ ｍ 暴露１ ｈ 各项测试的综合绩效进一步降低。错误率也显著增加（Ｐ＜ ０．０５）。 结论 ２ ８００ ｍ高度的低压缺氧即对感知觉能力产生一定负面影响，且随着高度的增加进一步加重。不同测验项目受缺氧影响的特性和阈值不同
Objective To study the effect of acute hypobaric hypoxia on human sensory perception. Methods The hypoxia chamber was used to simulate the acute hypoxia exposure at 3 800 m, 3 600 m, and 4 400 m for 1 h. The changes of the test performance of 18 healthy male adolescents on length judgment, pattern comparison and digital retrieval were investigated. Results The parameters measured at a height of 300 m were used as normal control values. The hypoxia exposure time of 2 800 m was 1 h. The overall performance of the length judgment was lower than that of the control (P <0.05) Response time was significantly longer (P <0.01), and overall performance was significantly reduced. However, there was no significant change in the error rate of pattern comparison and digital search (P> 0.05), and the integrated performance of all tests further decreased after 1 400 h of exposure. The error rate also increased significantly (P <0.05). Conclusion Hypobaric hypoxia at a height of 2 800 m has a negative effect on sensory perception and further aggravates with altitude increase. Different test items affected by hypoxia characteristics and threshold different