Describe x-ray chest.
Interstitial pulmonary edema with perihilar streaking
Diffuse, fine, reticulogranular (ground-glass) densities with low lung volumes and air bronchograms
Describe the ABG.
Hypoxia with respiratory acidosis; may lead to increased lactate levels
Evaluate for partial respiratory failure or global respiratory failure
Describe the amniocentesis for prenatal testing of NRDS.
—> screening for markers of fetal lung immaturity
Lecithin-sphingomyelin ratio < 1.5 (≥ 2 is considered mature)
The amount of sphingomyelin in the amniotic fluid remains relatively consistent during pregnancy.
The amount of lecithin, which is the major component of surfactant, starts increasing after week 26 of gestation.
The lower the lecithin-sphingomyelin ratio, the more likely it is that the lungs are immature.
Foam stability index < 0.48
A semi-quantitative test used to assess fetal lung maturity
Amniotic fluid is mixed with ethanol until foam formation ceases to occur
The index refers to the highest quantity of ethanol that can be added to amniotic fluid still permitting the formation of foam.
Low surfactant-albumin ratio