Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 6

When severe HDN is present, which of the following tests on the amniotic fluid would the physician not order to determine whether the fetal lungs are mature enough to withstand a premature delivery?

A. AFP levels

B. Foam stability index

C. Lecithin/sphingomyelin ratio

D. Phosphatidyl glycerol detection

Step 1 of 2

Hemolytic Disease on Newborn (HDN):

Fetal anemia is caused by HDN.

When severe HDN exists, the physician orders the following tests to assess whether the fetal lungs are matured enough to resist preterm delivery.

• Fetal lung maturity

• Lecithin/Sphingomyelin ratio

• Phosphatidyl glycerol

• Foam stability index

• Lamellar bodies

Therefore, the “AFP levels” is associated with neural tube disorders. The AFP test is not ordered by the physician to examine fetal lung maturity. Hence, the correct answer is option.