Sauerbrei E E, Pham D H
Radiology. 1986 Jul;160(1):109-12. doi: 10.1148/radiology.160.1.3520643.
In 30 pregnant patients who experienced vaginal bleeding between 10 and 20 weeks gestation, subchorionic hematomas were demonstrated on ultrasound examination. In 18 patients (60%), the margin of the placenta was separated from the uterine wall. In 15 patients the outcome was favorable (full-term delivery of normal infant) and in 15 patients the outcome was unfavorable (seven preterm births, four stillbirths, three spontaneous abortions, one therapeutic abortion). The major prognostic factor related to pregnancy outcome was the volume of the hematoma and, to a lesser extent, the relative volume of the hematoma (volume of hematoma divided by volume of gestational sac). For a volume less than 60 ml, the outcome tended to be favorable, and for a relative volume less than 0.4, the outcome tended to be favorable.
在30例妊娠10至20周期间出现阴道出血的孕妇中，超声检查显示有绒毛膜下血肿。18例患者（60%）胎盘边缘与子宫壁分离。15例患者结局良好（足月分娩正常婴儿），15例患者结局不佳（7例早产、4例死产、3例自然流产、1例治疗性流产）。与妊娠结局相关的主要预后因素是血肿体积，在较小程度上是血肿相对体积（血肿体积除以妊娠囊体积）。对于体积小于60毫升的情况，结局往往良好；对于相对体积小于0.4的情况，结局往往良好。
