Nelson L H, Melone P J, King M
Department of Obstetrics and Gynecology, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, North Carolina.
Obstet Gynecol. 1990 Sep;76(3 Pt 2):506-9.
Vasa previa, which is associated with high fetal mortality, is present when fetal vessels cross the internal cervical os as a velamentous insertion of the umbilical cord with or without a succenturiate lobe or bilobate placenta. This is the first case report of vasa previa not associated with a succenturiate lobe or bilobate placenta and in which the diagnosis was made using a combination of transvaginal ultrasonography and color flow Doppler ultrasound. The infant was delivered by elective cesarean, and the ultrasound findings were confirmed. Color flow Doppler and transvaginal ultrasound facilitate this diagnosis because the internal os and surrounding structures are easier to visualize; in addition, vascular flow and Doppler patterns characteristic of the umbilical cord can be demonstrated in structures suspected to be vessels.
前置血管与胎儿高死亡率相关，当胎儿血管跨越宫颈内口，呈帆状附着的脐带，无论有无副叶胎盘或双叶胎盘时，即存在前置血管。这是首例与副叶胎盘或双叶胎盘无关的前置血管病例报告，且该病例是通过经阴道超声检查和彩色多普勒超声联合诊断的。婴儿通过择期剖宫产分娩，超声检查结果得到证实。彩色多普勒和经阴道超声有助于诊断，因为宫颈内口及周围结构更容易可视化；此外，在疑似血管的结构中可以显示脐带特有的血流和多普勒模式。
