Author Question: A nurse is assessing a 12-month-old infant. Which statement best describes the infant's physical ... (Read 103 times)

darbym82 · **on:** Jun 28, 2018

A nurse is assessing a 12-month-old infant. Which statement best describes the infant's physical development a nurse should expect to find?

a. Anterior fontanel closes by age 6 to 10 months.
b. Binocularity is well established by age 8 months.
c. Birth weight doubles by age 5 months and triples by age 1 year.
d. Maternal iron stores persist during the first 12 months of life.

Question 2

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

cascooper22 · **Reply #1 on:** Jun 28, 2018

Answer to Question 1

ANS: C
Growth is very rapid during the first year of life. The birth weight has approximately doubled by age 5 to 6 months and triples by age 1 year. The anterior fontanel closes at age 12 to 18 months. Binocularity is not established until age 15 months. Maternal iron stores are usually depleted by age 6 months.

Answer to Question 2

ANS: B, C
Normal values of pH for a newborn are:
Birth: 7.117.36
1 day: 7.297.45
Child: 7.357.45.
Normal values of PCO2 are:
Newborn: 2740 mm Hg
Infant: 2741 mm Hg
Girls: 3245 mm Hg
Boys: 3548 mm Hg.
Normal values for HCO3- are:
Infant: 2128 mEq/ml
Thereafter: 2226 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.