Abstract：
OBJECTIVE: We aim to evaluate the effect of right lateral position on fetal hemodynamics (including umbilical artery [UA] and middle cerebral artery (MCA) blood flow-velocity waveform).
METHODS: In total, 150 low-risk singleton full-term pregnant women were included in the study from November 2021 to January 2022. Doppler flow velocity waveforms of the fetal UA and MCA tested by ultrasound were collected in gestation of 37-40 weeks. Computational analysis was performed using the one-way ANOVA test.
RESULTS: Compared with the maternal left lateral position, there was a significant increase in Doppler indices of UA-RI (P = .033), UA-S/D (P = .019) and MCA-PSV (P = .021) and a significant decrease in MCA-RI (P = .030) in the supine position group. There was no statistical significance in all Doppler indices between the left and right lateral position (P > .05). Among the Doppler indices of three different maternal positions, there was no significance in both UA-PI and MCA-PI (P > .05).
CONCLUSIONS: There were no significant differences on changes of the fetal hemodynamics between left and right lateral positions. Pregnant women could adopt to lie in the left or right lateral position alternately to relieve the discomfort in late pregnancy.
METHODS: In total, 150 low-risk singleton full-term pregnant women were included in the study from November 2021 to January 2022. Doppler flow velocity waveforms of the fetal UA and MCA tested by ultrasound were collected in gestation of 37-40 weeks. Computational analysis was performed using the one-way ANOVA test.
RESULTS: Compared with the maternal left lateral position, there was a significant increase in Doppler indices of UA-RI (P = .033), UA-S/D (P = .019) and MCA-PSV (P = .021) and a significant decrease in MCA-RI (P = .030) in the supine position group. There was no statistical significance in all Doppler indices between the left and right lateral position (P > .05). Among the Doppler indices of three different maternal positions, there was no significance in both UA-PI and MCA-PI (P > .05).
CONCLUSIONS: There were no significant differences on changes of the fetal hemodynamics between left and right lateral positions. Pregnant women could adopt to lie in the left or right lateral position alternately to relieve the discomfort in late pregnancy.
摘要：
目的：我们旨在评估右侧卧位对胎儿血流动力学（包括脐动脉[UA]和大脑中动脉（MCA）血流速度波形）的影响。
方法：总共，从2021年11月到2022年1月，150名低风险单胎足月孕妇被纳入研究。收集妊娠37-40周超声检测的胎儿UA和MCA的多普勒流速波形。使用单向ANOVA检验进行计算分析。
结果：与产妇左侧卧位相比，UA-RI的多普勒指数显着增加（P=.033），仰卧位组UA-S/D(P=.019)和MCA-PSV(P=.021),MCA-RI显著降低(P=.030)。左右侧位各多普勒指标差异无统计学意义(P>.05)。在三种不同母体位置的多普勒指数中，UA-PI和MCA-PI均无统计学意义(P>.05)。
结论：左右侧位胎儿血流动力学变化无明显差异。孕妇可采取左侧卧位或右侧卧位交替，以减轻妊娠晚期的不适。
方法：总共，从2021年11月到2022年1月，150名低风险单胎足月孕妇被纳入研究。收集妊娠37-40周超声检测的胎儿UA和MCA的多普勒流速波形。使用单向ANOVA检验进行计算分析。
结果：与产妇左侧卧位相比，UA-RI的多普勒指数显着增加（P=.033），仰卧位组UA-S/D(P=.019)和MCA-PSV(P=.021),MCA-RI显著降低(P=.030)。左右侧位各多普勒指标差异无统计学意义(P>.05)。在三种不同母体位置的多普勒指数中，UA-PI和MCA-PI均无统计学意义(P>.05)。
结论：左右侧位胎儿血流动力学变化无明显差异。孕妇可采取左侧卧位或右侧卧位交替，以减轻妊娠晚期的不适。
