A preterm infant was born at 31 weeks and has been admitted to the NICU. The nurse notes expiratory grunting, nasal flaring, and cyanosis on room air. Which laboratory findings would correlate with this condition?
A.
PaCO2: 56 mm Hg
B.
PaO2: 76 mm Hg
C.
pH: 7.30
D.
SaO2: 94%
ANS: A
This premature infant is at risk for respiratory distress syndrome (RDS) and has classic signs of the disorder. Laboratory values consistent with this condition are hypercarbia, metabolic acidosis, and low measured levels of oxygen either by arterial blood gas analysis or oxygen saturation. Normal PaCO2 for infants is 35-40 mm Hg, so this level is high. The other values are normal.
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