P01.37: Reference range of fetal nasal bone length at 11-14 weeks of gestation
نویسندگان
چکیده
منابع مشابه
Reliability of fetal nasal bone length measurement at 11–14 weeks of gestation
BACKGROUND Nasal bone assessment has been incorporated into Down syndrome screening in first trimester. Several studies have established the normal reference values for fetal nasal bone length in the first trimester, which were found to be varied by population. However, the study on reliability of nasal bone length measurement was limited with contradictory results. This study aimed to investig...
متن کاملAssessment of the fetal nasal bone at 11-14 weeks of gestation by three-dimensional ultrasound.
OBJECTIVE To evaluate the benefit of three-dimensional (3D) ultrasound in the examination of the fetal nasal bone at 11-14 weeks of gestation. METHOD We examined the fetal nasal bone in 120 stored volumes acquired transabdominally with a 3D scanner from singleton pregnancies at 11-14 weeks of gestation. The volume acquisition had been performed following conventional ultrasound examination th...
متن کاملNormal fetal nasal bone length at 14 to 28 weeks of gestation.
The fetal nasal bone length (FNBL) is a recent sonographic marker included in second trimester genetic sonography which varies with race and ethnicity. The importance of measuring FNBL is in the prenatal diagnosis of Down's syndrome (DS), the most common chromosomal abnormality. Nasal bone hypoplasia or absence is one of the frequent features of DS. Different studies conducted in different part...
متن کاملAbsent nasal bone at 11-14 weeks of gestation and chromosomal defects.
OBJECTIVE To examine the association between absence of the nasal bone at the 11-14-week ultrasound scan and chromosomal defects. METHODS Ultrasound examination was carried out in 3829 fetuses at 11-14 weeks' gestation immediately before fetal karyotyping. At the scan the fetal crown-rump length (CRL) and nuchal translucency (NT) thickness were measured and the fetal profile was examined for ...
متن کاملLearning curve for sonographic examination of the fetal nasal bone at 11-14 weeks.
OBJECTIVE To determine the number of ultrasound examinations necessary for training sonographers to examine accurately the fetal nasal bone at 11-14 weeks' gestation. METHODS Fifteen sonographers with experience in measuring nuchal translucency were asked to examine the nasal bone during the routine 11-14-week scan. The supervising doctor recorded if the sonographer succeeded in obtaining the...
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ژورنال
عنوان ژورنال: Ultrasound in Obstetrics and Gynecology
سال: 2006
ISSN: 0960-7692
DOI: 10.1002/uog.3423