Abstract
Objective: To evaluate whether three‐dimensional sonography is more valid than two‐dimensional sonography, and color Doppler ultrasound in diagnosing nuchal cord in utero.Methods: Eighty‐five singleton pregnancies without nuchal cord and 35 with nuchal cord (30 single nuchal cord, four double nuchal cords, and one triple nuchal cords) were studied within 1 week before delivery using a transabdominal three‐dimensional sonography. Two‐dimensional sonography and color Doppler ultrasound were also conducted.Results: Three‐dimensional sonography identified in utero 22 (73.3%) single and 3 (60%) multiple nuchal cords found at birth. There were no significant differences in overall diagnostic indices of each diagnostic modality for detecting nuchal cord. However, the ability to view nuchal cord was better with three‐dimensional sonography than with two‐dimensional sonography or color Doppler ultrasound.Conclusions: Three‐dimensional surface imaging does not provide more useful diagnostic information than two‐dimensional sonography and color Doppler ultrasound for detecting nuchal cord in utero.
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