【摘要】 目的了解早期妊娠黄体的二维声像特点及彩色多普勒血流特征。方法采用经阴道超声检测148例早期妊娠4～12周孕妇的卵巢,观察卵巢内黄体的二维声像及彩色多普勒血流改变,检测收缩期最大峰值流速(PVS)、阻力指数(RI)及搏动指数(PI)。结果148例早期妊娠孕妇卵巢中二维超声检出黄体130例,辅助彩色多普勒超声检出黄体146例,黄体囊平均直径2.3±0.77cm。黄体的二维声像分为3种类型:实性低回声型68例(46.6%)、厚壁囊肿型63例(43.2%),薄壁囊肿型15例(10.3%)。黄体血流分布特征为沿黄体囊壁边缘环状或半环状血流,环状血流占67.8%(99/146),不连续半环状血流占17.8%(26/146),仅7.5%(11/146)呈单支条状血流。黄体血流的多普勒频谱特征为中速低阻力的血流信号,收缩期最大峰值流速为0.307±0.154m/s,阻力指数(RI)0.475±0.069,搏动指数(PI)0.675±0.141,血流速度及血流阻力不随孕周增加而改变。结论早期妊娠经阴道彩超可准确识别卵巢中的妊娠黄体,妊娠黄体具有特征性超声表现。更多还原

【Abstract】 Objective To analysis the echogenic feature an d blood flow waveform of the corpus lu teum during early trimester of pregnancy.Methods In total 148pregnant women were enro lled in this study.The e-chogenic feature and the blood flow i ndexes(PVS,RI and PI )of the ovarian corpus luteum were ass essed from4th to 12th gestational week with tra ns-vaginal color Doppler ultrasono graphy.Results On gray-scale ultra-sonography,corpus luteum was ident ified in 130cases out of 148.With assistant color Doppler ultrasound,th e corpus luteum was identified in 146c ases.The diameter of the luteal cyst was 2.3±0.77cm.The gray-scale appearances were classified into th ree types:a round hypo-echoic structure found in 68cases(46.6%),a thick-walled cystic structure found in 63cases(43.2%)and a thin-walled cystic structure f ound in 15cases(10.3%).Color Doppler imaging types revealed the luteal blood flow patterned a c ircumferential rim around the entire luteal cyst wall(67.8%),a hemicycle rim around the cyst wall(17.8%)and single blood flow within the cyst wall.Doppler ultrasonographi c feature of the corpus luteum was low-resistance blood flow,with resistance index 0.475±0.069,pulsatility index 0.675±0.141and mean peak systoli c velocity 0.307±0.154.Con-clusion The corpus luteum in early pregnancy is precisely identified and has characterized features on trans-vaginal color Doppler ultrasonography.[更多还原