Goeschen K, Dudenhausen J W, Kynast G, Saling E
Geburtshilfe Frauenheilkd. 1980 Sep;40(9):813-7. doi: 10.1055/s-2008-1039336.
The samples of amniotic fluid from 55 transabdominal amniocenteses were examined with a simple spectrophotometric test for the predictive value on the risk of respiratory distress syndrome. There was a highly significant correlation between the lecithin content and the optical density of the amniotic fluid at 650 nm (r = 0.065 at p <0.001). No infant with an extinction threshold value of less than 0.15 had neonatal respiratory distress syndrome.
