Comparison of Middle Cerebral Artery Pulsatility Index in Singleton and Twin Pregnancies
- VernacularTitle:正常双胎及单胎胎儿大脑中动脉搏动指数变化的比较
- Author:
Qian CHEN
;
Izumi AKIO
;
Minakami HISANORI
;
Sato IKUO
- Publication Type:Journal Article
- Keywords:
Cerebral artery Blood flow velocity Fetus
- From:
Chinese Journal of Perinatal Medicine
1998;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective (1)To study the change of fetal middle cerebral artery pulsatility index (PI_MCA) in twin pregnancy; (2)To compare the singleton and twin pregnancies with regard of changes in PI_MCA over the course of the pregnancy. Methods Fetal middle cerebral artery flow velocity waveforms were measured in 34 cases of normal twin pregnancies and 176 cases of normal singleton pregnancies from 23～35 gestational weeks. Results PI_MCA in twin pregnancies exhibited a decrease trend toward the gestation. Before 29 weeks' gestation the PI_MCA in twin pregnancies was lower than that of the singleton pregnancies,and it was rather higher than that of the singleton pregnances after 29 weeks'gestation. Conclusions The vascular resistance in middle cerebral artery after 29 weeks of gestation was higher in twin pregnancies than that of the singleton pregnancies.
