子宫收缩会增加胎儿心脏的前负荷。
Uterine contractions increase fetal heart preload.
作者信息
Takahashi Y, Iwagaki S, Nakagawa Y, Kawabata I, Tamaya T
机构信息
Department of Obstetrics and Gynecology, Gifu University School of Medicine, Gifu City, Japan.
出版信息
Ultrasound Obstet Gynecol. 2003 Jul;22(1):53-6. doi: 10.1002/uog.142.
OBJECTIVE
The preload index (PLI) has been shown to increase in the recipient fetus of twin-twin transfusion syndrome in the presence of uterine contractions. The objective of this study was to determine whether there are changes in PLI in the presence of uterine contractions in normal fetuses.
METHODS
Inferior vena cava blood flow was measured using Doppler sonography in 45 normal fetuses at 18-41 weeks' gestation in the presence of uterine contractions and during quiescence and the PLI was compared between groups.
RESULTS
There was a highly significant difference (P < 0.0001) between the mean +/- SD PLI in fetuses in the absence (0.235 +/- 0.07) and in the presence (0.534 +/- 0.183) of uterine contractions.
CONCLUSION
Uterine contractions appear to increase fetal preload conditions in normal pregnancy.
目的
已表明在双胎输血综合征的受血胎儿中，子宫收缩时预负荷指数（PLI）会升高。本研究的目的是确定正常胎儿在子宫收缩时PLI是否有变化。
方法
在妊娠18 - 41周时，对45例正常胎儿在子宫收缩时及安静状态下使用多普勒超声测量下腔静脉血流，并比较两组之间的PLI。
结果
无子宫收缩时胎儿的平均±标准差PLI（0.235±0.07）与有子宫收缩时（0.534±0.183）之间存在高度显著差异（P < 0.0001）。
结论
子宫收缩似乎会增加正常妊娠时的胎儿预负荷情况。
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