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Am J Perinatol 1986; 3(4): 315-317
DOI: 10.1055/s-2007-999887
ORIGINAL ARTICLE

© 1986 by Thieme Medical Publishers, Inc.

Maturity of Fetal Lungs Determined by Bubble Stability in Amniotic Fluid

Erich K. Müller-Tyl
  • Department of Obstetrics and Gynecology, University of Vienna
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Publication Date:
04 March 2008 (online)

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ABSTRACT

A simple and quick screening method to determine fetal lung maturity is tested. Artificial air bubbles in amniotic fluid are measured microscopically in a moist chamber. Thus the concentration of the lung surfactant is evaluated and presented by the stability index (SI). This index increases continuously during pregnancy and is used as a means to determine fetal lung maturity. The large standard deviation of the SI between 30 and 35 weeks gestation limits the application of this simple method.