在训练有素的自由潜水者中,大脑的血液动力学和系统生理变化完成了两种不同深度的雪辅助潜水
Eva-Maria S Bønnelycke1, Tommaso A Giacon2,3, Gerardo Bosco2
1Sea Mammal Research Unit, Scottish Oceans Institute, University of St. Andrews, St. Andrews, Scotland, United Kingdom.
概括
这项研究标准化了自由潜水研究,显示深度影响心血管和氧气调节. 在更深的海底,尽管动脉氧和度较低,但大脑的氧化水平仍然稳定.
科学领域:
- 身体生理学 身体生理学
- 人类自由潜水.
- 调节心血管系统的调节
背景情况:
- 现有的自由潜水研究缺乏标准化的协议,由于运动和深度等混变量,阻碍了比较.
- 调查依赖深度的生理影响需要对运动进行控制和标准化潜水配置文件.
- 了解这些影响对于评估和减轻自由潜水中的风险至关重要.
研究的目的:
- 为了研究深度依赖于大脑血液动力学,氧化,动脉氧和和心率在喘息潜水期间的深度影响.
- 建立自由潜水研究的标准化方法,控制运动和深度.
- 探索可穿戴近红外光谱 (NIRS) 对于潜水期间持续的生理监测的实用性.
主要方法:
- 六名训练有素的自由潜水员进行了以雪辅助的15米和42米深度的喘息潜水.
- 连续波近红外光谱 (NIRS) 监测大脑血液动力学和氧化.
- 测量了心率和动脉氧和度 ([公式:见文本]);通过定期采样验证了动脉血液气压.
主要成果:
- 大脑的血液动力学变化与喘息潜水一致,而上升期间的肺部扩张影响了氧化.
- 动脉氧和 ([公式:见文本]) 在42米潜水后显著降低,但平均脑动脉静脉氧和保持在74%的稳定.
- 从42米的高度上升时,大脑的氧气供应可能是通过增加动脉输送来维持的;最低心率没有显著的深度依赖差异.
结论:
- 使用可穿戴NIRS和受控潜水的标准化方法允许研究自由潜水中的特定深度生理反应.
- 潜入42米深的自由潜水会影响动脉氧和度,但大脑氧和度会保持,可能是通过加强动脉输送.
- 这种标准化的方法为未来的自由潜水研究和降低风险的策略提供了基础.
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