A nurse is reviewing acid-base laboratory data on a newborn admitted to the NICU for meconium aspiration. Which laboratory values should the nurse report to the physician? (Select all that apply.)
a. pH: 7.35
b. PCO2 : 49
c. HCO3-: 30
d. PaO2: 96
ANS: B, C
Normal values of pH for a newborn are:
Birth: 7.11–7.36
1 day: 7.29–7.45
Child: 7.35–7.45.
Normal values of PCO2 are:
Newborn: 27–40 mm Hg
Infant: 27–41 mm Hg
Girls: 32–45 mm Hg
Boys: 35–48 mm Hg.
Normal values for HCO3- are:
Infant: 21–28 mEq/ml
Thereafter: 22–26 mEq/ml.
The PaO2 is within normal limits for a newborn. Therefore, the nurse should report the PCO2 of 49 and the HCO3- of 30.
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