The nurse administers an antibiotic and naproxen to an older female adult. Which labor-atory test result should the nurse monitor to gauge the older adult's response to the me-dication?
a. Urine creatinine
b. Indirect bilirubin
c. Serum creatinine
d. White blood cells
A
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A Correct. Antibiotics and nonsteroidal antiinflammatory agents like naproxen can cause kidney damage from various mechanisms; thus the nurse monitors the urine creatinine because it reflects the system's ability to clear waste products and is especially important for gauging appropriate medication administration.
B Incorrect. Unconjugated (indirect) bilirubin reflects the liver's ability to conju-gate serum bilirubin.
C Incorrect. Serum creatinine, also a reflection of renal function, usually remains stable throughout life.
D Incorrect. White blood cells can reflect the degree of infection or inflammation in the body; however, the ability of an older adult to respond to infection can be diminished, and thus this can be a misleading indicator.
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