title: Comparison of amniotic fluid optical density and foam stability test in predicting fetal lung maturity.
abstract: The ability of optical density measurements and the foam stability test to predict the L/S ratio of amniotic fluid (AF) was examined. Optical density measurements and the foam test predicted the L/S ratio with a similar degree of accuracy; neither was able to replace biochemical measurement of the L/S ratio because both gave false negative and false positive predictions. Optical density measurements and the foam test did not combine to increase the accuracy of prediction.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D008168:Lung / Q000196:embryology*; D010713:Phosphatidylcholines / Q000032:analysis; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods; D013057:Spectrum Analysis; D013109:Sphingomyelins / Q000032:analysis
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins