Investigation of Bone Ratios for Prenatal Fetal Assessment in Taiwanese Population ()
ABSTRACT
The purpose of this study is to calculate the ratios
of fetal limb bone to nasal bone length (NBL) obtained by transabdominal ultrasound
between 19 and 28 weeks of gestation. Cross-sectional data were obtained from
1408 women with singleton pregnancies who underwent an advanced prenatal
ultrasound examination from August 2006 to September 2008. The single
measurement plane of fetal limb bones was on the longest section of
each structure with appropriate image magnification. To assess repeatability of
the intraobserver, two repeated measurements were obtained in 44 fetuses. The
ratio of fetuses with biparietal diameter (BPD)/NBL was compared with those of
fetal limb bones/NBL. The mean ratio was found between fetal NBL measurements
and BPD (7.240), humerus length (HL) (4.807), radius length (RL) (4.157), ulna
length (UL) (4.502), femur length (FL) (5.131), tibia length (TL) (4.528), and
fibula length (FiL) (4.507). The reference ranges of fetal long bone length/NBL
ratios for the second trimester was established by transabdominal sonography.
There were no significant increases in these ratios with gestational age,
especially the HL/NBL ratio.
Share and Cite:
F. Yang and Y. Lin, "Investigation of Bone Ratios for Prenatal Fetal Assessment in Taiwanese Population,"
Engineering, Vol. 4 No. 10B, 2012, pp. 146-149. doi:
10.4236/eng.2012.410B038.
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