The measurement of lecithin in relation to sphingomyelin (lecithin/sphingomyelin [L/S] ratio)is used to determine fetal lung maturity.Which ratio reflects fetal maturity of the lungs?
A) 1.4:1
B) 1.8:1
C) 2:1
D) 1:1

Question

Quizplus · Accepted Answer

The lecithin/sphingomyelin (L/S) ratio of 2:1 or greater generally indicates fetal lung maturity. This ratio increases as the fetal lungs mature, with lecithin (a surfactant) increasing in amount relative to sphingomyelin.

The Measurement of Lecithin in Relation to Sphingomyelin (Lecithin/sphingomyelin [L/S]