Pellerito J S, Taylor K J, Quedens-Case C, Hammers L W, Scoutt L M, Ramos I M, Meyer W R
Department of Diagnostic Imaging, Yale University School of Medicine, New Haven, CT 06510.
Radiology. 1992 May;183(2):407-11. doi: 10.1148/radiology.183.2.1561341.
Endovaginal sonography and endovaginal color flow imaging were compared in 155 patients with clinical suspicion of ectopic pregnancy. Sixty-five patients (42%) had surgically confirmed ectopic pregnancies. Thirty-six of the pregnancies were diagnosed with endovaginal sonography alone, the criteria being an extrauterine sac or ectopic fetus (sensitivity, 54%). Sixty-two ectopic pregnancies were diagnosed with endovaginal color flow imaging (sensitivity, 95%) when an ectopic fetus or sac was seen or placental flow was identified in an adnexal mass separate from the ovary and uterus. The diagnosis of ectopic pregnancy was excluded with endovaginal sonography (specificity, 98%) and endovaginal color flow imaging (specificity, 98%) by finding an intrauterine gestation, nonvisualization of an adnexal mass, and absence of placental flow. Three false-positive and three false-negative diagnoses were made with endovaginal color flow imaging (positive predictive value, 97%). The addition of color Doppler flow imaging to endovaginal sonography allows increased sensitivity in the detection of ectopic pregnancy.
对155例临床怀疑异位妊娠的患者进行了经阴道超声检查和经阴道彩色血流成像检查。65例患者（42%）经手术证实为异位妊娠。其中36例妊娠仅通过经阴道超声检查确诊，诊断标准为宫外孕囊或异位胎儿（敏感性为54%）。当在附件区肿块（与卵巢和子宫分开）中看到异位胎儿或孕囊或识别出胎盘血流时，62例异位妊娠通过经阴道彩色血流成像确诊（敏感性为95%）。通过经阴道超声检查（特异性为98%）和经阴道彩色血流成像检查（特异性为98%），发现宫内妊娠、未观察到附件区肿块且无胎盘血流，从而排除异位妊娠的诊断。经阴道彩色血流成像出现3例假阳性和3例假阴性诊断（阳性预测值为97%）。在经阴道超声检查中增加彩色多普勒血流成像可提高异位妊娠检测的敏感性。
