title: Assessment of a rapid test on amniotic fluid for estimating fetal lung maturity.
abstract: We have measured the absorbance of centrifuged amniotic fluids at 650 nm. and found reasonably good correlation between the absorbance and the L/S ratio. In 87 fluids studied, an absorbance of greater than 0.100 predicted correctly an L/S ratio of 2 or more in 98 per cent of the cases. When the absorbance was less than 0.100, 70 per cent of the fluids had an L/S ratio of less than 2.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010713:Phosphatidylcholines / Q000032:analysis; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis; D013054:Spectrophotometry, Atomic; D013109:Sphingomyelins / Q000032:analysis
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins