After the fourth dose of gentamicin sulfate (Garam...

HESI RN MEDICAL SURGICAL EXAM PACK QUESTIONS AND ANSWERS

Question Number 28

After the fourth dose of gentamicin sulfate (Garamycin) IV, the nurse plans to draw blood samples to determine peak and trough levels. When are the best times to draw these samples?A) 15 minutes before and 15 minutes after the next dose. B) One hour before and one hour after the next dose. C) 5 minutes before and 30 minutes after the next dose. D) 30 minutes before and 30 minutes after the next dose.

C) 5 minutes before and 30 minutes after the next dose. Rationale: Peak drug serum levels are achieved 30 minutes after IV administration of aminoglycosides. The best time to draw a trough is the closest time to the next administration (C). (A, B, and D) are not as good a time to draw the trough as (C). (B and D) are not the best times to draw the peak of an aminoglycoside that has been administered IV.

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HESI RN MEDICAL SURGICAL EXAM PACK QUESTIONS AND ANSWERS

Question Number 28

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