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孕中期应用血清甲胎蛋白和游离β绒毛膜促性腺激素筛查Down综合征的研究

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摘要 目的探讨完善孕中期血清学筛查胎儿Down综合征的方法,增加检出率,有效减少假阴性及假阳性。方法应用酶联免疫吸附方法(ELISA)测定16636名孕中期(14-20w)孕妇血清甲胎蛋白(AFP)及游离β绒毛膜促性腺激素(freeβ-hCG)浓度;应用专用软件综合评价妊娠Down综合征胎儿的风险度。结果孕14-20w孕妇血清AFP浓度随孕周的增加而迅速增加,β-hCG浓度随孕周的增加而迅速降低。1005例(6.0%)为Down's综合征高危妊娠,诊断妊娠染色体异常胎儿15例,漏检3例。妊娠染色体异常胎儿检出率83.3%。筛查假阳性率5.9%。结论孕中期应用ELISA法筛查Down综合征筛查效果满意。应注意孕周的核对以及筛查截断值的确定,制定良好的筛查策略。
出处 《中国优生与遗传杂志》 2006年第6期39-40,24,共3页 Chinese Journal of Birth Health & Heredity
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