van den Wijngaard J A, van Eyck J, Noordam M J, Wladimiroff J W, van Strik R
Department of Obstetrics and Gynaecology, Erasmus University, Rotterdam, The Netherlands.
Biol Neonate. 1988;53(5):274-8. doi: 10.1159/000242802.
Doppler flow velocity waveforms in the fetal internal carotid artery were recorded in 21 normal pregnancies during fetal behavioural state IF (quiet sleep) and 2F (active sleep) according to Nijhuis and co-workers, from the 36th week of gestation onwards. The present study confirms the earlier finding of a significant reduction of the pulsatility index (PI) in state 2F as compared to state 1F at 37-38 weeks of gestation and demonstrates that this difference in PI exists throughout the entire period, in which fetal behavioural states have been described. Furthermore, it is demonstrated that there is a significant reduction in PI of this vessel during the last 4 weeks of gestation, suggesting a haemodynamic redistribution, favouring blood supply to the brain during the latter weeks of gestation.
根据奈伊休斯及其同事的方法，从妊娠36周起，对21例正常妊娠胎儿在行为状态IF（安静睡眠）和2F（活跃睡眠）期间的胎儿颈内动脉多普勒血流速度波形进行了记录。本研究证实了早期的发现，即在妊娠37 - 38周时，与状态1F相比，状态2F的搏动指数（PI）显著降低，并且表明在描述胎儿行为状态的整个时期内，PI的这种差异都存在。此外，研究表明在妊娠的最后4周，该血管的PI显著降低，这表明存在血流动力学重新分布，有利于在妊娠后期向大脑供血。
