Control study of the ultrasonography with the placental vascular casts of the acardiac twins sequence
10.3760/cma.j.issn.1004-4477.2011.04.018
- VernacularTitle:双胎反向动脉灌注序列征声像图与胎盘血管铸型的对比研究
- Author:
Xinlin CHEN
;
Xiaohong YANG
;
Peiwen CHEN
;
Sheng ZHAO
;
Qiaoying PENG
;
Mei XIAO
;
Xiaojun LU
;
Lei ZHAO
- Publication Type:Journal Article
- Keywords:
Ultrasonography;
Twins reversed arterial perfusion sequence;
Placenta;
Corrosion casting
- From:
Chinese Journal of Ultrasonography
2011;20(4):327-330
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the relationship between the ultrasonography diagnosis in prenatal and the postnatal placental vascular casts of the twins reversed arterial perfusion(TRAP) sequence. Methods Six cases of TRAP sequence underwent the two-dimensional and color Doppler ultrasonography, and performed placental vascular casts after termination of pregnance. Results According to the anatomical features and ultrasonography, there were 3 cases of acardius acephalus( IV) ,2 cases of acardius anceps( II ) , and 1 case of acardius acormus( I ). In all 6 cases,there were arterio-arterial and veno-venous anastomoses at the level of the chorionic plate between the normal co-twin and the acardiac twin,these anastmosis vessels were superficial and large calibre, and the distances of the placental insertions of the umbilical cords were different,4 cases <0. 5 cm, 2 cases were 4-5 cm. In 4 cases, the vessels entered and went out of the acardiac twin were just one large umbilical artery and one large umbilical vein. In 2 cases, the umbilical artery and umbilical vein had many vascular branches in the placenta. Out of 6 cases of the pump twin, 4 cases died,and 2 cases survived. Conclusions Ultrasonography was consistent with the placental vascular casts,the contrast observing gives us new information for the further research of the special type of the vascular anastmosis and prognosis of the TRAP sequence.
