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23 January 2020 : Clinical Research  

Maternal Utero-Placental Perfusion Discordance in Monochorionic-Diamniotic Twin Pregnancies with Selective Growth Restriction Assessed by Three-Dimensional Power Doppler Ultrasound

Lan Zhang1234BCDEF, Xiyao Liu134BF, Junnan Li1234BD, Xing Wang1234BF, Shuai Huang1234BD, Xiaofang Luo134DF, Hua Zhang134DF, Li Wen134AEF, Chao Tong134AEG*, Richard Saffery56AE, Jianying Yan7FG, Hongbo Qi1347AG, Mark D. Kilby89ADE, Philip N. Baker10ADE

DOI: 10.12659/MSM.919247

Med Sci Monit 2020; 26:e919247

Abstract

BACKGROUND: The aim of this study was to assess the correlation between selective growth restriction (sGR) and co-twin utero-placental perfusion discordance by using three-dimensional power Doppler (3DPD).

MATERIAL AND METHODS: We prospectively recruited 60 sGR and 64 normal monochorionic-diamniotic (MCDA) twin pregnancies. Vascularization index (VI), flow index (FI), and vascularization flow index (VFI) were assessed by 3DPD, while umbilical artery pulsatility index (UA-PI), middle cerebral artery peak systolic velocity (MCA-PSV), pulsatility index (MCA-PI), and cerebroplacental ratio (CPR) were assessed by conventional Doppler imaging.

RESULTS: In sGR co-twins, the VI, FI, VFI, MCA-PI, and CPR were significantly lower, while the UA-PI and MCA-PSV were significantly greater, in the smaller fetuses compared with the larger fetuses; significant differences were also observed in the VI, FI, VFI, CPR, and UA-PI in normal co-twins. Compared with the appropriately grown twins, the discordances of the VI, FI, VFI, UA-PI, MCA-PI, and CPR were increased in the sGR cohort. The discordances of the VI, FI, VFI, UA-PI, MCA-PI, and CPR were associated with birthweight discordance, and the FI discordance and CPR discordance were independently associated with sGR. The combination of the FI and CPR discordance showed a higher predictive accuracy for sGR, with an area under the ROC curve of 0.813, and a sensitivity and specificity of 68.33% and 85.94%, respectively.

CONCLUSIONS: MCDA twin pregnancies with birthweight discordance presented utero-placental perfusion deterioration assessed by 3DPD prior to sGR diagnosis. Co-twin utero-placental perfusion discordance was significantly correlated with growth discordance, and this correlation was more predictive of sGR when 3DPD was combined with conventional Doppler imaging.

Keywords: Growth Disorders, Placental Circulation, Prenatal Diagnosis, Twins, Monozygotic, Ultrasonography, Doppler, Color, Blood Flow Velocity, Cohort Studies, Cross-Sectional Studies, Echocardiography, Doppler, Fetal Growth Retardation, Gestational Age, Middle Cerebral Artery, Placenta, Pregnancy, Pregnancy, Twin, Pulsatile Flow, Ultrasonography, Ultrasonography, Doppler, Ultrasonography, Prenatal, Umbilical Arteries, Uterus

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750