Fetal Lung Maturity
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Predicting fetal lung maturity and assessing the risk of developing neonatal respiratory distress syndrome, when performed during 32 to 39 weeks gestation.
Immature: <15,000/mcL; Indeterminate: 15,000 - 50,000/mcL; Mature: >50,000/mcL.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect amniotic fluid and refrigerate. Avoid contamination of the amniotic fluid with blood, meconium, or maternal urine. If possible, send specimen immediately. Do not centrifuge sample. Note that an additional 10 mL of amniotic fluid are needed if the FLM results indicate that the lung is immature and the clinician wishes to add the L/S Ratio.