The nurse is caring for a patient with pneumonia. Which laboratory test would best help the nurse to monitor the condition of this patient?
a. Electrolytes, serum creatinine
b. Complete blood count (CBC), urinalysis
c. Partial thromboplastin time (PTT), serum potassium
d. White blood cell (WBC) count, arterial blood gases (ABGs)
ANS: D
WBC is elevated in infection, and ABGs may be abnormal if gas exchange is impaired with pneumonia. CBC may be helpful, but WBC is more specific. A. B. Urinalysis, electrolytes, and creatinine are useful in kidney and bladder problems. C. PTT and potassium may be ordered for cardiovascular problems, among other disorders.
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