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 A
Explanation
Choice A reason: Respiratory depression from high morphine doses signals toxicity; opioids suppress the brainstem’s respiratory center, exceeding safe therapeutic levels at this extent.
Choice B reason: Allergic reactions involve immunity (e.g., rash, anaphylaxis); slowed breathing isn’t allergic, but a dose-dependent opioid effect on respiration.
Choice C reason: Idiosyncratic means unexpected (e.g., paradoxical excitement); respiratory depression is a predictable morphine overdose sign, not an unusual reaction.
Choice D reason: Therapeutic effects relieve pain; 8 breaths/minute is dangerously low, beyond intended analgesia, indicating a harmful, not beneficial, outcome.
Correct Answer is B
Explanation
Choice A reason: Pharmacy technicians are not authorized to administer medications. Their scope involves preparation and dispensing under supervision, ensuring safety and compliance.
Choice B reason: Safe practice standards dictate that the preparing nurse administers the medications to ensure accuracy and accountability, minimizing potential errors.
Choice C reason: Delegating to the head nurse violates medication administration protocols, as accountability rests with the nurse who prepared the medications.
Choice D reason: Allowing other licensed nurses to distribute medications increases the risk of errors due to lack of firsthand knowledge of preparation specifics.
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