The nurse is to administer the patient's next dose of vancomycin at 9:30 a.m. What time will the nurse draw the patient's blood to check the trough vancomycin level?
8:30 a.m.
9:00 a.m.
10:00 a.m.
10:30 a.m.
The Correct Answer is B
Choice A reason: Drawing at 8:30 a.m., 60 minutes before, is too early; trough levels, taken just before the next dose, reflect minimum concentration, and this timing risks inaccurate results.
Choice B reason: At 9:00 a.m., 30 minutes before the 9:30 a.m. dose, the trough level accurately measures the lowest vancomycin concentration, ensuring therapeutic monitoring aligns with pharmacokinetics.
Choice C reason: Drawing at 10:00 a.m., after the dose, measures a post-infusion level, not the trough; this timing misses the minimum concentration critical for dosing adjustments.
Choice D reason: At 10:30 a.m., well after the dose, blood reflects peak or random levels, not the trough, skewing data needed to assess vancomycin’s therapeutic efficacy and safety.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: One 5-mg tablet delivers 5 mg; this underdoses the 10 mg ordered, reducing salivation stimulation needed for dry eye relief.
Choice B reason: Two 5-mg tablets equal 10 mg; this matches the order, ensuring therapeutic cholinergic effect to increase tear production effectively.
Choice C reason: Three tablets (15 mg) overdose; excess pilocarpine risks side effects (e.g., sweating, bradycardia) without added benefit for dry eyes.
Choice D reason: Four tablets (20 mg) far exceed the dose; this could cause severe cholinergic toxicity, including respiratory distress, outweighing therapeutic intent.
Correct Answer is A
Explanation
Choice A reason: Blood indicates vascular entry; discarding prevents unintended IV delivery of an IM drug, avoiding rapid absorption risks and ensuring proper route administration.
Choice B reason: Giving with blood risks IV administration; IM drugs aren’t formulated for this, potentially causing embolism or toxicity, violating safety administration principles.
Choice C reason: Changing the needle leaves contaminated medication; blood-mixed drugs are unsafe, and this fails to address the compromised dose integrity fully.
Choice D reason: Omitting skips treatment needlessly; the issue is procedural, not the order, and restarting ensures the patient receives the intended therapy safely.
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