Nyberg D A, Cyr D R, Mack L A, Wilson D A, Shuman W P
AJR Am J Roentgenol. 1987 Jan;148(1):161-4. doi: 10.2214/ajr.148.1.161.
Fifty-seven cases of placental abruption detected by sonography were retrospectively reviewed. The location of hemorrhage was subchorionic in 46 cases (81%), retroplacental in nine cases (16%), and preplacental in two cases (4%). Subchorionic hematomas were more frequently shown in the 33 patients presenting before 20 menstrual weeks (91%) than in the 24 patients presenting after 20 weeks (67%). The echogenicity of hemorrhage depended on the time the sonogram was performed relative to the onset of symptoms: Acute hemorrhage was hyperechoic to isoechoic compared with the placenta, while resolving hematomas became hypoechoic within 1 week and sonolucent within 2 weeks. Acute hemorrhage was occasionally difficult to distinguish from the adjacent placenta. This occurred in five retroplacental hematomas that showed only an abnormally thick and heterogeneous placenta. Nine cases of placental abruption were initially confused with other mass lesions. Placental abruption causes a wide spectrum of sonographic findings that may be overlooked or misdiagnosed.
对57例经超声检查发现的胎盘早剥病例进行了回顾性分析。出血部位：绒毛膜下46例（81%），胎盘后9例（16%），胎盘前2例（4%）。绒毛膜下血肿在20孕周前就诊的33例患者中更为常见（91%），而在20孕周后就诊的24例患者中占67%。出血的回声特性取决于超声检查相对于症状出现的时间：急性出血与胎盘相比为高回声至等回声，而正在吸收的血肿在1周内变为低回声，2周内变为无回声。急性出血偶尔难以与相邻胎盘区分。这发生在5例胎盘后血肿中，这些血肿仅显示胎盘异常增厚且不均匀。9例胎盘早剥最初与其他占位性病变混淆。胎盘早剥会导致一系列超声表现，这些表现可能被忽视或误诊。
