国际妇产科学杂志 ›› 2012, Vol. 39 ›› Issue (1): 75-78.

• 论著 • 上一篇    下一篇

21-三体综合征妊娠早期联合筛查模式的评估


常 颖 , 陈 叙,崔红艳 , 王小莉, 任晨春
  

  1. 300100 天津市中心妇产科医院
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 陈 叙

Screening for Trisomy 21 at 11—13+6 Weeks of Gestation

CHANG Ying,CHEN Xu,CUI Hong-yan,WANG Xiao-li,REN Chen-chun   

  1. ianjin Center Hospital of Obstetrics and Gynecology,Tianjin 300100,China
  • Received:1900-01-01 Revised:1900-01-01 Published:2012-02-15 Online:2012-02-15
  • Contact: CHEN Xu

摘要: 目的:评估妊娠早期联合筛查21-三体综合征模式的质量。方法:入选者为500例妊娠11~13+6周进行产前筛查的妊娠妇女,超声检测胎儿颈项透明层(nuchal translucency,NT)厚度,同时取妊娠妇女静脉血,以时间分辨法检测血清中游离人绒毛膜促性腺激素亚单位(β-hCG)及妊娠相关蛋白A(PAPP-A)水平,并根据患者年龄、体质量、种族、吸烟史、妊娠方式、妊娠周数等转化成该指标的中位数倍数(MoM),风险值为1∶270,联合评估妊娠妇女21-三体综合征的患病风险,记录实施产前诊断妊娠妇女胎儿的染色体核型。所有妊娠妇女均进行妊娠期监测及产后随访,将妊娠妇女及胎儿结局输入数据库。最后对妊娠早期时的筛查模式及筛查质量进行评估。结果:①500例中有6例为21-三体高风险(行产前诊断5例),其中3例在产前诊断时确诊。另有40例为年龄高风险(>35岁),其中5例行产前诊断,均为正常核型胎儿。②在妊娠早期,非21-三体核型胎儿的NT厚度随其顶臀长(CRL)增加而增加。③正常胎儿母亲血清PAPP-A水平随妊娠周增加而增加,β-hCG水平随妊娠周增加而下降。结论:①单独年龄高风险不应作为产前诊断的指标。②NT厚度与妊娠周相关,应进行多中心大样本研究,并根据不同妊娠周建立适合中国人群的NT诊断标准。③妊娠早期筛查应在有超声NT测量资质的医院进行,且最好在妊娠12周时进行。④妊娠早期母亲血清PAPP-A及β-hCG水平变化与妊娠周有关。

关键词: 唐氏综合征, 多相筛查, 妊娠初期, 超声检查

Abstract: Objective:To investigate the performance of first trimster screening for aneuploidies in the combined test of maternal age,fetal translucency thickness and serum free β-human chorionic gonadotropin (β-hCG) and pregnancy- associated plasma protein-A(PAPP-A). Methods:Screening with the combined test at 11 to 13+6 weeks of gestation was performed in singleton pregnancies,including 497 euploid fetues and 3 trisomy 21syndrome. The blood test and ultrasound scan were carried out in the same visit. The measure free β-hCG and PAPP-A were converted into a multiple of the median (MoM) for gestational age,adjusted for maternal weight,ethnicity,smoking status,method of conception. Results:① 500 cases of pregnant women in early screening of trisomy 21 and 6 high-risk people,of which 3 were confirmed by prenatal diagnosis. Another 40 were age high-risk,5 of whom were normal. ② NT thickness count on the CRL. ③Serum PAPP-A levels ascend and free β-hCG of the maternal unaffected decrease with pregnant weeks increasing. Conclusions:①The high risk of ages can not be a rule in invasive prenatal diagnosis. ②The NT dependant on the CRL,and we should perform multicenter study to find the NT standard of chinese pepole. ③NT screening should be measured in a qualified hospital,and preferably 12 weeks of gestation.④The maternal serum level of PAPP-A and free β-hCG relate with the pregnant weeks.

Key words: Down syndrome, Multiphasic screening, Pregnancy trimester, first, Ultrasonography