Aerosp Med Hum Perform. 2024 Oct;95(10):758-764. doi: 10.3357/AMHP.6380.2024.
Hypoxia training is mandatory for military pilots, but variability in hypoxia symptoms challenges the training. In a previous study we showed that 64% of pilots recognized hypoxia faster in their second normobaric hypoxia session conducted 2.4 yr after the first. Our aim here was to evaluate whether a third session conducted 5.0 yr after the first would provide further benefit.
This study was conducted under normobaric conditions in a tactical F/A-18C Hornet simulator in three sessions in which the pilots performed visual identification missions and breathed 21% oxygen in nitrogen. The breathing gas was changed to a hypoxic mixture containing either 8%, 7%, or 6% oxygen in nitrogen without the pilot's knowledge. Data were collected from 102 military pilots. The primary outcome was the time taken for initial identification of hypoxia symptoms.
Hypoxia symptoms were recognized on average in the first session in 8% oxygen in 100 s, 7% oxygen in 90 s, and 6% oxygen in 78 s; in the second in 87 s, 80 s, and 71 s, respectively; and in the third in 79 s, 67 s, and 64 s, respectively. In 2 sessions 20 pilots and in each 3 training sessions 3 pilots had slow recognition times.
Hypoxia symptom recognition improved the further the repeated normobaric hypoxia training went. More emphasis should be put on the 23% group of slow hypoxia symptom recognizers and more customized hypoxia training for them should be offered. Leinonen AM, Varis NO, Kokki HJ, Leino TK. Normobaric hypoxia symptom recognition in three training sessions. Aerosp Med Hum Perform. 2024; 95(10):758-764.
缺氧训练是军事飞行员的必修课，但缺氧症状的变化给训练带来了挑战。在之前的一项研究中，我们发现 64%的飞行员在首次进行 2.4 年后的第二次常压缺氧训练中更快地识别出缺氧。我们的目的是评估在首次训练 5.0 年后进行第三次训练是否会带来进一步的益处。
这项研究在一个战术 F/A-18C 大黄蜂模拟器中进行，在三个常压条件下的训练课程中，飞行员执行视觉识别任务，并在氮中呼吸 21%的氧气。飞行员在不知情的情况下，呼吸气体被切换到含有 8%、7%或 6%氧气的缺氧混合物中。数据来自 102 名军事飞行员。主要结果是飞行员首次识别出缺氧症状所需的时间。
在第一次课程中，飞行员在 8%氧气中平均在 100 秒内识别出缺氧症状，在 7%氧气中平均在 90 秒内识别出，在 6%氧气中平均在 78 秒内识别出；在第二次课程中，分别在 87 秒、80 秒和 71 秒内识别出；在第三次课程中，分别在 79 秒、67 秒和 64 秒内识别出。在 2 次课程中有 20 名飞行员，在每次 3 次课程中有 3 名飞行员识别时间较慢。
重复进行常压缺氧训练，飞行员对缺氧症状的识别能力会提高。应更加关注识别时间较慢的 23%的飞行员群体，并为他们提供更有针对性的缺氧训练。Leinonen AM, Varis NO, Kokki HJ, Leino TK. Normobaric hypoxia symptom recognition in three training sessions. Aerosp Med Hum Perform. 2024; 95(10):758-764.
