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为了细胞染色体检查,在进行中期妊娠羊膜腔穿刺以前,常规超声胎盘定位,对其是否可减少诸如穿刺得血,穿刺失败或诱发流产等并发症,目前尚无统一意见。作者对223例中期妊娠羊膜腔穿刺者进行了随机分组的研究,全部均作超声胎盘定位,羊膜腔穿刺固定由二人进行,每人负责一组,甲组111例,穿刺者不知道超声检查结果,凭临床体征选择穿刺部位,乙组112例,穿刺者根据超声检查结果而选择穿刺部位(见表)。
For the purpose of cell chromosome examination, conventional ultrasound placenta localization prior to amniocentesis for the second trimester of pregnancy does not provide any unanimous opinion as to whether it can reduce complications such as poor blood penetration, puncture failure or induced abortion. The author of 223 cases of midterm amniocentesis were randomized into groups, all of which were ultrasound placenta accreta, amniocentesis fixed by two, each responsible for a group, 111 cases of group A, the puncture who do not know the ultrasound examination Results, the choice of clinical signs of puncture site, B group 112 cases, puncture according to the results of ultrasound and select the puncture site (see table).