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目的 探讨中晚孕期正常胎儿静脉导管(DV)血流参数变化规律并建立正常值范围。方法 应用彩色多普勒超声检查2012年1月至2013年5月中国医科大学附属盛京医院(121例)及沈阳市妇婴医院(91例)就诊的212例21~42孕周正常单胎胎儿,成功获取DV血流频谱196例,测量速度参数与阻力参数值。结果 获得各参数正常值范围,其中速度参数与孕周呈指数正相关(P<0.01);阻力参数与孕周呈指数负相关(P<0.01)。结论 中晚孕期正常胎儿DV血流频谱速度参数随孕周增长而上升,阻力参数随孕周增长而下降。
Objective To investigate the changes of blood flow parameters of normal fetal venous catheter (DV) in middle and late pregnancy and establish the normal range. Methods The color Doppler ultrasonography was performed on 212 normal pregnant women aged 21-42 gestational weeks from January 2012 to May 2013 at Shengjing Hospital Affiliated to China Medical University (121 cases) and Shenyang Maternal and Child Hospital (91 cases) Fetal, successful acquisition of 196 cases of DV blood flow spectrum, measurement of velocity and resistance parameters. Results The range of normal value of each parameter was obtained. The speed parameter was positively correlated with gestational age (P <0.01). The resistance parameter was negatively correlated with gestational age (P <0.01). Conclusion The frequency parameters of normal fetal DV blood flow in middle and late pregnancy increase with gestational age, while the resistance parameters decrease with gestational age.