血管前置的产前超声筛查与诊断

Prenatal ultrasound screening and diagnosis of vasa previa

血管前置是导致围产儿死亡的一个危险因素,经阴道分娩围产儿死亡率高。超声检查是产前诊断血管前置最可靠且简便、易推广的检查方法。当产前超声检查发现低置胎盘、双叶胎盘、副胎盘、多叶胎盘、多胎妊娠、帆状胎盘等高危发病因素时,需详细检查宫颈内口,常规的检查方法是经腹超声检查,当因胎先露阻挡等原因显示宫颈内口不满意时,需结合经会阴超声检查或经阴道超声检查;经阴道超声检查是该3种检查方法中最可靠的显示方法,但合并阴道活动性出血或宫颈机能不全时不宜使用。对于产前诊断血管前置的病例,建议于临产前行选择性剖宫产术。

Vasa previa is a dangerous factor which may result in fetal demise.Vaginal delivery may lead to high fetal mortality.Ultrasound is the most reliable,simple and generalized way for diagnosis of prenatal vasa previa.If the following high risk factors are detected by prenatal ultrasound,such as low lying placenta,bi-lobed placenta,succenturiate lobe,multi-lobed placenta,multiple pregnancy and velamentous insertion of the cord,the internal cervical os is necassary for examination.Transabdominal ultrasound is th...