Cullen M T, Green J J, Reece E A, Hobbins J C
Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut 06510.
J Ultrasound Med. 1989 Oct;8(10):565-9. doi: 10.7863/jum.1989.8.10.565.
Ultrasound visualization of the first trimester embryo was compared using abdominal and transvaginal sonography. The parameters evaluated included the ability to obtain biometry, the ability to visualize detailed internal anatomy, and a subjective assessment of the overall image clarity. In 120 patients studied, transvaginal sonography was superior to abdominal sonography in obtaining biometric measurements in 51 cases (43%) and for visualizing internal anatomy in 45 cases (38%); also the image clarity of transvaginal sonography was subjectively better in 75 cases (63%). Vaginal sonography was superior to abdominal sonography in gestations less than or equal to 10 weeks, in obese patients, and in patients with retroverted uteri. The major difficulty encountered with transvaginal sonography was the limited maneuverability of the probe to generate specific views. Vaginal sonography can be a valuable tool in imaging the first trimester fetus, complementing, not replacing, abdominal sonography.
使用腹部超声和经阴道超声对孕早期胚胎的超声可视化进行了比较。评估的参数包括获取生物测量数据的能力、可视化详细内部解剖结构的能力以及对整体图像清晰度的主观评估。在研究的120例患者中，经阴道超声在51例（43%）中获取生物测量数据方面优于腹部超声，在45例（38%）中可视化内部解剖结构方面优于腹部超声；此外，经阴道超声的图像清晰度在75例（63%）中主观上更好。阴道超声在妊娠小于或等于10周的患者、肥胖患者和子宫后倾患者中优于腹部超声。经阴道超声遇到的主要困难是探头产生特定视图的可操作性有限。阴道超声可以成为孕早期胎儿成像的有价值工具，是对腹部超声的补充，而非替代。
