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 |
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Přispěvatelé: | Selçuk Üniversitesi |
Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
Adult
Cephalometry 2d ultrasound Gestational Age Nose Eye Skin thickness lcsh:Gynecology and obstetrics Ultrasonography Prenatal Andrology 03 medical and health sciences Young Adult 0302 clinical medicine Pregnancy Reference Values Femur length Medicine Humans Nasal Bone 030212 general & internal medicine Femur Foetal nasal bone length Prenasal thickness lcsh:RG1-991 Retrospective Studies 2D ultrasound 030219 obstetrics & reproductive medicine Biparietal diameter business.industry Interocular distance Obstetrics and Gynecology Gestational age Nasal bone Linear relationship Pregnancy Trimester Second Gestation Female business Research Article |
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 |
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