在健康的人体中,对向下倾斜的头部呼吸道反应
Abdulaziz Alsharifi1,2, Niamh Carter1, Akbar Irampaye1
1Centre for Human and Applied Physiological Sciences (CHAPS), Faculty of Life Sciences and Medicine, King's College London, London, UK.
Experimental physiology
|October 24, 2024
概括
头向下倾斜显著增加了高头期间的通风,这表明呼吸控制发生了变化. 这在没有改变大脑血流的情况下发生,这表明有独特的生理机制.
科学领域:
- 生理学 生理学 生理学
- 呼吸系统控制 呼吸系统控制
- 心血管监管 监管心血管系统
背景情况:
- 姿势液体的变化通过巴罗和化疗反射影响呼吸控制.
- 关于头向下倾斜 (HDT) 期间稳定状态呼吸器反应的数据有限.
研究的目的:
- 为了研究在急性50°头向下倾斜时的心肺呼吸反应.
- 在HTT期间,在各种气体条件下检查通风器调整.
主要方法:
- 18名健康的受试者从俯卧或俯卧的位置进行了50°的头向下倾斜.
- 测量包括通风,潮尾气体,血压和中脑动脉血流速度 (MCAv).
- 试验对象在有或没有高氧气的情况下呼吸了诺摩西亚,低氧气或高头 (5%的CO2).
主要成果:
- 在超氧性超 (139%) 和正常性超 (131-129%) 两种情况下,空气通风在HDT期间显著增加.
- 在使用医疗空气或缺氧的HTT期间,没有观察到呼吸的显著变化.
- 中脑动脉的血流速度 (MCAv) 在高强度治疗期间保持不变.
结论:
- 在高头的急剧头向下倾斜时增强通风可能涉及超出大脑血流调节的机制.
- 脑静脉压力和外流变化被假设为这些呼吸系统变化的潜在贡献者.
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