缺氧对飞行员颅内氧饱和度及血容积的影响

报道了低氧（１０．５％．Ｖ）对６０名飞行员颅内氧饱和度（ＳｃＯ２）和血容积（ＢＶ）的影响，实验中使用了一种近红外仪器，非侵入，连续监视颅内ＳｃＯ２和ＢＶ。５名受试者由于低氧时血压（ＢＰ）和心率（ＨＲ）变化较大，未能完成全部实验，其余５５名在低氧时，颅内ＳｃＯ２和ＢＶ发生了明显变化（Ｐ〈０．０１），即ＳｃＯ２下降，ＢＶ升高，低氧解除时约有８０％受试者在８ｍｉｎ恢复期内ＳｃＯ２已恢复到实验前对照水平。

Effect of Hypoxia on Pilot''''s Cerebral Oxygen Saturation and Blood Volume

Effects of hypoxia(10.5% V)on cerebral oxygen saturation(ScO_2)and blood volume(BV)in the brain were studied in 60 pilots.A noninvasive and continous near infrared instrument was used to monitor ScO_2 and BV.Five pilots didn,t complete the experiments,because their blood pressure(BP)and heart rate(HR)changed too large during the hypoxia.ScO_2 of 80% normal subjects returned to control level in 8 min recovering time.But BV of all 60 subjects didn' t return to control value in 10 min recovering peried.The changes of ScO_2 and BV of 5 subjects who didn't complete the experiments were significantly diferent from those that of normal group during hypoxia(P<0.0l).We believe that this near-in-frared instrument is very useful for monitoring during hypoxia.