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Test Code LSRAT Lecithin-Sphingomyelin (L/S) Ratio, Amniotic Fluid

Methodology

Chromatography
L/S ratios are performed on amniotic fluid to measure certain phospholipids which are an indicator of the degree of maturity of the lung of a fetus.

Performing Laboratory

Magee-Women's Hospital

Specimen Requirements

5 mL of amniotic fluid. Specimen should be placed on wet ice immediately after draw and transported to the laboratory immediately.
Note:  Include estimate of duration of pregnancy (in weeks).

Reference Values

An interpretive report will be provided.

Day(s) Test Set Up

Monday through Friday