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Lamellar body counts for rapid fetal lung maturity testing
E R Ashwood1, S E Palmer, J S Taylor
1Department of Pathology, University of Utah School of Medicine, Salt Lake City.
Obstetrics and Gynecology
|April 1, 1993
Summary
Amniotic fluid lamellar body counting offers a rapid screening method for fetal lung maturity. Low counts indicate potential respiratory distress syndrome (RDS), suggesting further testing is needed.
Area of Science:
- Neonatal Medicine
- Obstetrics
- Clinical Chemistry
Background:
- Fetal lung maturity is crucial for neonatal outcomes.
- Accurate assessment of fetal lung maturity is essential to prevent respiratory distress syndrome (RDS).
- Lamellar body counting presents a potentially rapid method for assessing fetal lung maturity.
Purpose of the Study:
- To evaluate the efficacy of amniotic fluid lamellar body counting as a test for fetal lung maturity.
- To compare lamellar body counts with the lecithin-sphingomyelin (L/S) ratio in predicting neonatal outcomes.
Main Methods:
- A prospective clinical outcome study was conducted over three years.
- The study involved evaluating the outcomes of 247 neonates.
- Lamellar body counts and L/S ratios were analyzed in relation to the development of RDS.
Main Results:
- All neonates who developed RDS had lamellar body counts of 55,000/microL or less and L/S ratios of 2.2 or less.
- Conversely, 59% of neonates without RDS had lamellar body counts greater than 55,000/microL.
- 70% of neonates without RDS had L/S ratios higher than 2.2.
Conclusions:
- Lamellar body counting is a justified rapid screening test for predicting fetal lung maturity.
- Immature lamellar body count results warrant follow-up with a more specific test, such as the L/S ratio.
- This method can aid in timely clinical decisions regarding delivery and neonatal care.