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lesh0402 lesh0402
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6 years ago
Which of these tests is often done before birth to determine the maturity of the fetal lungs?
 
  a. amniotic bilirubin level
  b. amniotic creatine level
  c. L/S ratio (lecithin-to-sphingomyelin ratio)
  d. sonogram
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6 years ago
C
By approximately 35 weeks' gestation, the surfactant produced by the alveoli is sufficient in amount (L/S ration of 2:1) to allow the alveoli to remain partially expanded when the newborn begins to breathe at birth.
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