A nurse at a pediatric clinic is checking the vital signs of a 2-week-old infant. Which of the following findings is outside of the expected reference range?

Respiratory rate 68/min.

BP 64/42 mm Hg.

Axillary temperature 36.6° C (97.9° F).

Apical heart rate 124/min.

Answer and Explanation

The Correct Answer is A

This is outside of the expected reference range for a 2-week-old infant, which is 30 to 60 breaths per minute. A respiratory rate higher than 60 breaths per minute can indicate respiratory distress or infection.

Choice B is wrong because BP 64/42 mm Hg is within the normal range for a 2-week-old infant, which is 65 to 85/45 to 55 mm Hg.

Choice C is wrong because Axillary temperature 36.6° C (97.9° F) is within the normal range for a 2-week-old infant, which is 36.5 to 37.5° C (97.7 to 99.5° F).

Choice D is wrong because Apical heart rate 124/min is within the normal range for a 2-week-old infant, which is 110 to 160 beats per minute.

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Correct Answer is C

Explanation

The nurse should explain that the injection is administered in order to prevent vitamin K deficiency bleeding (VKDB) in the newborn. Vitamin K is needed for blood clotting, but newborn babies have very low levels of vitamin K in their bodies at birth because only small amounts of the vitamin pass through the placenta and breast milk. VKDB can cause life-threatening bleeding in various parts of the body, such as the brain, intestines, or skin. VKDB can be classified into early-onset, classic, or late- onset depending on the time of presentation after birth. The most effective way to prevent VKDB is to give a single intramuscular dose of 0.5 to 1 mg of vitamin K to all newborn infants within 6 hours of birth.

Choice A is wrong because sepsis is not caused by vitamin K deficiency, but by bacterial infection.

Choice B is wrong because tachypnea is not caused by vitamin K deficiency, but by respiratory distress or other conditions.

Choice D is wrong because jaundice is not caused by vitamin K deficiency, but by high levels of bilirubin in the blood.

A. Platelet count 120,000/mm². B. WBC count 9,800/mm³. C. Hgb 13 mg/dL. D. Hct 42%.

Correct Answer is A

Explanation

The nurse should notify the provider because this value is lower than the normal range of 150,000 to 450,000 platelets per microliter of blood. A low platelet count can indicate a risk of bleeding or a condition such as thrombocytopenia or disseminated intravascular coagulation (DIC).

Choice B is wrong because WBC count 9,800/mm³ is within the normal range of 4,500 to 11,000 cells per microliter of blood.

Choice C is wrong because Hgb 13 mg/dL is within the normal range of 12 to 16 mg/dL for females and 14 to 18 mg/dL for males.

Choice D is wrong because Hct 42% is within the normal range of 37% to 47% for females and 42% to 52% for males.

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A nurse at a pediatric clinic is checking the vital signs of a 2-week-old infant. Which of the following findings is outside of the expected reference range?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Explanation

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