Reference ranges for foetal nasal bone length, prenasal thickness, and interocular distance at 18 to 24 weeks’ gestation in low-risk pregnancies

Autor: M. Kazım Körez, Ayşegül Altunkeser
Přispěvatelé: Selçuk Üniversitesi
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: BMC Pregnancy and Childbirth, Vol 17, Iss 1, Pp 1-5 (2017)
BMC Pregnancy and Childbirth
ISSN: 1471-2393
Popis: WOS: 000417845400001
PubMed: 29233116
Background: The aim of the present study was to establish the normal ranges for foetal nasal bone length (NBL), prenasal skin thickness (PNT), interocular distance (IOD), and ratio of prenasal thickness to- nasal bone length (PNT/NBL) at 18-24 weeks using two-dimensional (2D) ultrasound.& para;& para;Methods: This study was a retrospective study of prenatal ultrasonographic records from 407 foetuses between 18 and 24 weeks gestational age (GA). The NBL, PNT, IOD, PNT/NBL ratio, biparietal diameter (BPD), and femur length (FL) were investigated. The relationships among NBL, PNT, IOD, PNT/NBL, and GA were evaluated. Additionally, descriptive statistics for NBL, PNT, and SOD values for each gestational week were obtained.& para;& para;Results: There was a significant association between GA and NBL, PNT, and IOD between 18 and 24 weeks. NBL increased from a mean of 5.5 mm to 8.3 mm, PNT increased from a mean of 3.5 mm to 5.1 mm, and SOD increased from a mean of 11.1 mm to 14.5 mm. PNT/NBL ratio did not change with gestational age.& para;& para;Conclusions: This study showed normal ranges for NBL, PNT, IOD, and PNT/NBL ratios for foetuses between 18 and 24 weeks in low-risk pregnancies. There was a positive linear relationship between GA and NBL, PNT, and IOD. The PNT/NBL ratio might be a more useful measurement than NBL or PNT alone.
Databáze: OpenAIRE