Thaler I, Timor-Tritsch I E, Blumenfeld Z
Acta Obstet Gynecol Scand. 1985;64(1):47-50. doi: 10.3109/00016348509154687.
The fetal heart rate response to acute hypoxemia was observed during an accidental drop in oxygen concentration inspired by the mother in labor. There was a marked increase in FHR variability in the early stage of hypoxia and also during the recovery phase. While an increase in fetal heart variability is generally considered to be a normal physiological event, it may also indicate a state of fetal hypoxemia associated with an intact fetal circulation, and should be treated with caution during labor.
在分娩过程中，因母亲吸入的氧气浓度意外下降而导致急性低氧血症时，观察到了胎儿心率反应。在缺氧早期以及恢复阶段，胎儿心率变异性均显著增加。虽然胎儿心率变异性增加通常被认为是正常的生理事件，但它也可能表明胎儿处于与完整胎儿循环相关的低氧血症状态，在分娩过程中应谨慎处理。
