van Eyck J, Wladimiroff J W, Noordam M J, Tonge H M, Prechtl H F
Early Hum Dev. 1985 Nov;12(2):137-43. doi: 10.1016/0378-3782(85)90176-8.
In 13 normal pregnancies, the relationship between the blood flow velocity waveform at the lower thoracic level of the fetal descending aorta and fetal behavioural states at 37-38 weeks of gestation was studied. The pulsatility index (PI), as a measure of peripheral vascular resistance, was significantly lower during state 2F compared to state 1F according to the classification by Nijhuis et al. (Nijhuis, J.G. et al. (1982) Early Hum. Dev., 6, 177-195), suggesting an increased perfusion of the fetal skeletal musculature to meet the energy demand needed for the raised muscular activity during state 2F; A significant inverse relationship (P less than 0.001) was established between PI and FHR in state 2F; this was mainly determined by a significant rise in end-diastolic flow velocity (P less than 0.02). Both the behavioural state and FHR should be taken into account when evaluating flow velocity waveforms in the fetal descending aorta during the latter weeks of pregnancy.
在13例正常妊娠中，研究了妊娠37 - 38周时胎儿降主动脉胸下段血流速度波形与胎儿行为状态之间的关系。根据Nijhuis等人的分类（Nijhuis, J.G.等人（1982年），《早期人类发育》，6，177 - 195），作为外周血管阻力指标的搏动指数（PI）在2F状态下显著低于1F状态，这表明胎儿骨骼肌的灌注增加，以满足2F状态下肌肉活动增强所需的能量需求；在2F状态下，PI与胎心率（FHR）之间建立了显著的负相关关系（P小于0.001）；这主要由舒张末期血流速度的显著升高所决定（P小于0.02）。在妊娠后期评估胎儿降主动脉血流速度波形时，应同时考虑行为状态和FHR。
