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Related Experiment Videos

[Nuchal translucency: technical measurement and value].

B Broussin1, M F Sarramon

  • 1Centre d'imagerie médicale 120 bis rue G. Bonnac 33000 Bordeaux. bernard.broussin@wanadoo.fr

Journal De Radiologie
|February 20, 2003
PubMed
Summary

Nuchal translucency screening effectively detects chromosomal anomalies. Combining this ultrasound marker with maternal age, gestational age, and other markers like nasal bone absence, improves detection rates for conditions such as trisomy 21.

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Area of Science:

  • Prenatal screening and diagnosis
  • Medical imaging in obstetrics
  • Fetal medicine

Background:

  • Nuchal translucency (NT) measurement is a key first-trimester screening tool.
  • Detecting chromosomal anomalies and fetal malformations is crucial for prenatal care.
  • Standardized techniques and mandatory training ensure reliable NT measurements.

Purpose of the Study:

  • To detail the standardized technique for nuchal translucency measurement.
  • To explain risk calculation for chromosomal anomalies, including trisomy 21.
  • To evaluate the performance of NT screening and its combination with other markers.

Main Methods:

  • Adherence to strict, standardized guidelines for NT measurement.
  • Incorporation of maternal age and gestational age into risk assessment.

Related Experiment Videos

  • Evaluation of additional ultrasound markers (e.g., nasal bone absence).

    • Main Results:

    • Nuchal translucency measurement is a powerful screening test for chromosomal anomalies.
    • In France, the positive predictive value for chromosomal anomalies was approximately 1/7 in 1999.
    • Combining NT with nasal bone assessment enhances detection rates.

    Conclusions:

    • Standardized nuchal translucency measurement is essential for accurate screening.
    • Risk assessment for chromosomal anomalies requires integrating NT with maternal and gestational age.
    • Combined screening approaches, including ultrasound and serum markers, offer improved detection performance.