• 医学文献
  • 知识库
  • 评价分析
  • 全部
  • 中外期刊
  • 学位
  • 会议
  • 专利
  • 成果
  • 标准
  • 法规
  • 临床诊疗知识库
  • 中医药知识库
  • 机构
  • 作者
热搜词:
换一批
论文 期刊
取消
高级检索

检索历史 清除

医学文献 >>
  • 全部
  • 中外期刊
  • 学位
  • 会议
  • 专利
  • 成果
  • 标准
  • 法规
知识库 >>
  • 临床诊疗知识库
  • 中医药知识库
评价分析 >>
  • 机构
  • 作者
热搜词:
换一批

妊娠早期超声多指标筛查胎儿染色体异常的临床价值

Ultrasound soft markers in screening for fetal chromosomal abnormality during first-trimester

摘要:

目的 探讨妊娠早期超声多指标筛查胎儿染色体异常的临床价值.方法 对2008年9月至2010年9月在暨南大学附属第一医院产科就诊的2789例妊娠早期(11~13+6周)单胎初产孕妇超声测量胎儿颈项透明层(nuchal translucency,NT)厚度,记录胎心率(fetal heart rate,FHR)、面部角度(facial angle,FA)、静脉导管(ductus venosus,DV)、三尖瓣反流(tricuspid reverse,TR)、胎儿鼻骨(nasal bone,NB)等超声指标,观察胎儿结构.全部超声指标检查结果输入Astraia风险筛查软件计算染色体异常风险值(>1/300为高风险截断值),根据知情同意原则对高风险者取绒毛或羊水进行染色体核型产前诊断.所有研究对象随访至分娩后6个月.率的比较用x2检验或Fisher精确概率法.结果 (1) 2789例孕妇筛查出21三体高风险107例,其中96例接受侵入性产前诊断,诊断染色体异常16例,染色体异常发生率为0.6%(16/2789),其中6例21-三体.2789例孕妇中,超声筛查21-三体高风险孕妇4例,最终确诊21-三体6例,假阳性率为3.6% (101/2783).(2) NT≥2.5 mm者196例,21-三体高风险66例,均经绒毛穿刺诊断,发现染色体异常16例;有创性检查率2.3%(66/2789).(3)≥35岁孕妇占筛查总数的6.7%(186/2789),其中检出21三体高风险32例,占21-三体高风险总数的29.9% (32/107);诊断21-三体2例,21-三体检出率为1.1%(2/186);年龄<35岁者21-三体检出率为0.2%(4/2597);年龄≥35岁和年龄<35岁人群中胎儿21-三体检出率差异无统计学意义(P=0.055).(4)筛查过程诊断胎儿结构异常13例,其中5例染色体核型异常.结论 妊娠早期超声多指标筛查将明显提高染色体异常胎儿检出率并降低假阳性和假阴性率,大大降低有创性检查率.尤其对高龄孕妇的染色体异常风险评估更有明显的指导意义.妊娠早期超声筛查不仅可以有效检出核型异常,同时可以诊断严重的胎儿结构异常.

更多
abstracts:

Objective To investigate the clinical values of multiple ultrasound soft markers in screening for fetal chromosomal abnormality during first-trimester.Methods Two thousand seven hundred and eighty-nine nulliparas in Department of Obstetrics,the First Affiliated Hospital of Jinan University during early pregnancy (11-13+6 gestational weeks) were selected for this study.Fetalnuchal translucency (NT),facial angle (FA),ductus venosus (DV),fetal heart rate (FHR),tricuspid reverse (TR),nasal bone (NB) and fetal structures were scanned and measured.Risk calculation software (Astraia) was used to calculate the chromosomal abnormal risk (cut-off line:>1/300) based on ultrasound records.The chorionic villi or amniotic fluid of high risk patients was collected with informed consent for karyotype analysis (prenatal diagnosis).All patients were followed up until six months after delivery.Chi-square test or Fisher exact test was used to compare the difference.Results One hundred and seven cases were high-risk of trisomy 21 among which 96 cases accepted invasive prenatal diagnosis.Sixteen chromosomal anomaly and six trisomy 21 cases were diagnosed out the 96 fetuses.Among 2789 cases,four were high-risk of trisomy 21 according to ultrasound screening.Six cases were diagnosed as trisomy 21.The false positive rate of ultrasound screening was 3.6%(101/2783).There were 196 cases whose NT ≥2.5 mm,in which 66 cases were high risk of chromosomal abnormality,and 16 fetal chromosomal abnormalities were diagnosed after chorionic villus sampling.The invasive procedure rate was 2.3% (66/2789).Totally,186 pregnant women were older than 35 years,among which 32 cases were high risk.There was no significantly difference on the of rate fetal chromosomal abnormality between the groups of age≥ 35 pregnant women and the general population (P=0.055).But 29.9% (32/107) high risk cases were detected in the group of age≥35.Five of thirteen fetal malformations cases were associated with abnormal karyotype.Conclusions Multiple ultrasound soft markers screening during early pregnancy could increase the diagnosis rate of chromosomal abnormality and decrease the false positive rate,false negative rate and invasive procedure rate.Early ultrasound screening might be effective in not only identifying chromosomal abnormality,but also diagnosing severe structure deformity of fetus.

More
  • 浏览:602
  • 下载:266

加载中!

相似文献

  • 中文期刊
  • 外文期刊
  • 学位论文
  • 会议论文

加载中!

加载中!

加载中!

加载中!

扩展文献

特别提示:本网站仅提供医学学术资源服务,不销售任何药品和器械,有关药品和器械的销售信息,请查阅其他网站。

  • 客服热线:4000-115-888 转3 (周一至周五:8:00至17:00)

  • |
  • 客服邮箱:yiyao@wanfangdata.com.cn

  • 违法和不良信息举报电话:4000-115-888,举报邮箱:problem@wanfangdata.com.cn,举报专区

官方微信
万方医学小程序
new翻译 充值 订阅 收藏 移动端

官方微信

万方医学小程序

使用
帮助
Alternate Text
调查问卷