Fetal Nasal Bone Length Evaluation in Second Trimester Pregnancies

Abstract

Abstract Aim: Nasal bone length of fetuses (NBL) in second trimester by measuring during routine obstetric sonography examination to determine the range of normal value for Turk society. Method: A total of 16-22 week gestational aged 250 healthy fetuses nasal bone lenght was measured with transabdominal ultrasonography. Results: Measurement of nasal bone lenght of 16, 17, 18, 19, 20, 21 and 22 week gestational aged fetuses were calculated respectively as: 2.9–4.6 mm, 3.3–5.1 mm, 3.4–7.3 mm, 4.3–6.6 mm, 4.8–7.3 mm, 4.6–7.5 mm, 5.6–7.2 mm (average of 5,4 mm ± 0.87). Conclusion: Nasal bone lenght of 16-22 week gestational aged fetuses were calculated as 2.9-7.5 mm. It should be considered as normal in this range. Nasal bone lenght of second trimester fetuses under 2.9 mm should be evaluated for fetal anomalies. KeyWords: Nasal bone, Ultrasound, Down's syndrome

Keywords

• Nasal bone, ultrasound, down’s syndrome

İkinci Trimester Gebeliklerde Fetal Nazal Kemik Uzunluğunun Değerlendirilmesi

Abstract

Amaç: İkinci trimesterdeki fetüslerin nazal kemik uzunluklarını (NKU) rutin obstetrik sonografi incelemesi sırasında ölçerek Türk toplumu için normal değer aralığını belirlemek. Gereç ve Yöntem: Çalışmaya 16–22 gebelik haftalarında 250 gebeye ait 250 sağlıklı fetus dahil edildi. Fetüsler General Electronic marka Logiq S6 model ultrasonografi cihazı ile 3.5 MHz konveks transduser kullanılarak transabdominal bakı ile değerlendirildi. Fetüslerın rutin ikinci trimester obstetrik incelemesi yapıldı ve sonografik olarak sağlıklı olduğu tespit edilen fetusların NKU'ları ölçüldü. Bulgular: NKU ölçümü 16. haftada 2.9–4.6 mm, 17. haftada 3.3–5.1 mm, 18. haftada 3.4–7.3 mm, 19. haftada 4.3–6.6 mm, 20. haftada 4.8–7.3 mm, 21. haftada 4.6–7.5 mm, 22. haftada 5.6–7.2 mm (ortalama 5.4 mm ± 0.87) olarak hesaplandı. Sonuçlar: Çalışmamızın sonucunda 16–22 gebelik haftalarında normal fetal NKU ölçümünü 2.9 ile 7.5 mm arası olarak hesaplandı. Bu nedenle 16-22 gebelik haftalarında NKU için 2.9 mm'nin altındaki değerler fetal anomali açısından araştırılmalıdır. Anahtar Kelimeler: Nazal kemik, Ultrasonografi, Down sendromu

Keywords

• Nazal kemik, ultrasonografi, down sendromu

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