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Study of fetal tracheal fluid velocities using Doppler ultrasound
Gilles Grangé1, Céline Bernabé-Dupont, Dominique Cabrol
1Maternité Port-Royal, Groupe Hospitalier Cochin Saint Vincent De Paul, APHP, Université Paris Descartes, Fondation PremUp, Paris, France. gilles.grange@cch.aphp.fr
Objective:
To characterize tracheal fluid flow during fetal breathing movements by Doppler ultrasound.
Study Design:
To use pulsed Doppler to measure flow velocity during inspiration and expiration in a cross-sectional study of 15 normal fetuses and determine the correlation, if any, between flow velocity and gestational age.
Results:
Cyclic respiratory profiles - both regular and irregular - were observed. Intratracheal flow velocity was very elevated during inspiration, ranging from 10 to 80 cm/s and from 5 to 20 cm/s during expiration.
Conclusion:
This technique enables the noninvasive semiquantitative evaluation of fetal breathing movements. This Doppler application opens the field for future studies to characterize the extent of pulmonary hypoplasia.
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