Rizzo G, Capponi A, Soregaroli M, Arduini D, Romanini C
Fetal Medicine Center, Department of Obstetrics and Gynecologicy, Università di Roma Tor Vergata, Italy.
J Clin Ultrasound. 1995 Nov-Dec;23(9):525-9. doi: 10.1002/jcu.1870230904.
The objective of this study was to investigate the effects in early gestation of retroplacental hematomas on Doppler indices measured in different fetal vascular districts and to relate these changes, if any, to the volume of hematoma and pregnancy outcome. Thirty-eight pregnancies complicated by bleeding and ultrasonographic findings of retroplacental hematomas were considered for this study. Menstrual age ranged between 9 and 14 weeks. Blood flow velocity waveforms were measured in the umbilical artery, descending aorta, middle cerebral artery, and inferior vena cava. The pulsatility index in arterial vessels was calculated as well as the percentage reverse flow in the inferior vena cava. The values obtained were compared to previously constructed reference limits. No significant differences were found for any of the Doppler indices when the values obtained in pregnancies complicated by retroplacental hematomas were compared to the reference limits. Furthermore no significant relationships were found between the Doppler indices and either the size of hematoma or pregnancy outcome. In conclusion, retroplacental hematoma does not induce hemodynamic effects in the fetal circulation before 14 weeks, menstrual age. These data do not support the use of Doppler ultrasonography in early gestation for pregnancies complicated by bleeding and retroplacental hematomas.
本研究的目的是调查胎盘后血肿在妊娠早期对不同胎儿血管区域测量的多普勒指数的影响，并将这些变化（如果有的话）与血肿体积和妊娠结局相关联。本研究纳入了38例因出血合并胎盘后血肿超声检查结果的妊娠病例。月经龄在9至14周之间。在脐动脉、降主动脉、大脑中动脉和下腔静脉测量血流速度波形。计算动脉血管的搏动指数以及下腔静脉的反向血流百分比。将获得的值与先前构建的参考限值进行比较。当将合并胎盘后血肿的妊娠中获得的值与参考限值进行比较时，未发现任何多普勒指数有显著差异。此外，在多普勒指数与血肿大小或妊娠结局之间未发现显著关系。总之，在月经龄14周之前，胎盘后血肿不会在胎儿循环中引起血流动力学效应。这些数据不支持在妊娠早期对合并出血和胎盘后血肿的妊娠使用多普勒超声检查。
