The physician orders vancomycin 500 mg in 250 mL of D5W IVPB daily to infuse over 2 hours. Tubing drop factor is 15 gtts/mL. Calculate the flow rate in drops per minute.
31 gtts/min
62 gtts/min
125 gtts/min
250 gtts/min
The Correct Answer is B
Choice A reason: 31 gtts/min assumes 250 mL over 4 hours with 15 gtts/mL; this halves the rate, underdelivering vancomycin, risking subtherapeutic levels and ineffective bacterial killing over the prescribed 2-hour infusion time.
Choice B reason: 62 gtts/min is correct; 250 mL over 2 hours is 125 mL/hr, times 15 gtts/mL equals 1875 gtts total, divided by 120 minutes yields 62 gtts/min, ensuring proper antibiotic delivery.
Choice C reason: 125 gtts/min doubles the rate; 250 mL in 1 hour with 15 gtts/mL is too fast, risking vancomycin toxicity, including renal damage, and exceeding safe infusion guidelines for IVPB.
Choice D reason: 250 gtts/min assumes 250 mL in 30 minutes; this dangerously rapid rate could cause vancomycin-induced red man syndrome or cardiovascular overload, far beyond the ordered 2-hour infusion duration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Fentanyl patches provide continuous opioid delivery for 72 hours; their fixed schedule isn’t “as needed,” making them unsuitable for acute, variable pain management.
Choice B reason: Acetaminophen with oxycodone is scheduled every 6 hours; this fixed interval lacks the flexibility of “as needed,” limiting its use for breakthrough pain relief.
Choice C reason: Morphine extended-release is designed for sustained release over 12 hours; its fixed dosing isn’t “as needed,” restricting its role to chronic, not acute, pain control.
Choice D reason: Ketorolac IV every 4 hours prn allows flexible dosing; this NSAID targets inflammation and pain acutely, ideal for as-needed administration within safe limits.
Correct Answer is B
Explanation
Choice A reason: Showing the client isn’t a standard check; patients don’t verify MAR, and this step lacks relevance to the nurse’s triple-check safety protocol.
Choice B reason: Checking before returning ensures accuracy; the third check confirms the right drug post-administration, completing the three-point verification process safely.
Choice C reason: Calling the pharmacy is unrelated; label checks occur during administration, not external consultation, making this an irrelevant timing option.
Choice D reason: Colleague checks aren’t routine; the three checks are individual, and this step doesn’t align with standard MAR verification timing protocols.
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