Nyberg D A, Laing F C, Filly R A, Uri-Simmons M, Jeffrey R B
Radiology. 1983 Mar;146(3):755-9. doi: 10.1148/radiology.146.3.6828692.
A retrospective review of 128 consecutively scanned pregnant patients who had either early intrauterine pregnancies (IUPs) or ectopic pregnancies was performed to determine the accuracy of the finding of an intrauterine double decidual sac (DDS) in distinguishing between these two groups of patients. The presence of a DDS correlated with an IUP in 59 of 60 patients (98.3%). Of 68 patients who lacked a DDS, only four had normal IUPs; the remaining patients had either ectopic pregnancies or abnormal IUPs. Results of this study suggest that the finding of a DDS at ultrasonography is useful in making an early diagnosis of IUP, while its absence strongly suggests either an ectopic pregnancy or an abnormal IUP.
对128例连续接受扫描的孕妇进行回顾性研究，这些孕妇要么是早期宫内妊娠（IUP），要么是异位妊娠，以确定宫内双蜕膜囊（DDS）的发现对于区分这两组患者的准确性。60例患者中有59例（98.3%）DDS的存在与宫内妊娠相关。在68例没有DDS的患者中，只有4例宫内妊娠正常；其余患者要么是异位妊娠，要么是宫内妊娠异常。本研究结果表明，超声检查发现DDS有助于早期诊断宫内妊娠，而未发现DDS则强烈提示异位妊娠或宫内妊娠异常。
