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 C
Explanation
Choice A reason: An ID number alone lacks context; without name confirmation, it risks mismatching if wristbands are swapped, missing a critical identity check.
Choice B reason: Name alone may coincide with common names; without a unique identifier like a hospital number, this method risks errors in a busy unit.
Choice C reason: Name and hospital number provide dual identifiers; this matches the MAR precisely, ensuring accuracy for an unconscious patient per safety standards.
Choice D reason: Calling an unconscious patient is futile; they can’t respond, making this impractical and unreliable compared to objective wristband verification.
Correct Answer is D
Explanation
Choice A reason: Half a tablet (10 mg) underdoses; expired drugs may degrade, and 40 mg is needed for diuresis, risking therapeutic failure in this scenario.
Choice B reason: Two tablets (40 mg) meet the dose but are expired; potency loss post-April 2013 risks inefficacy or toxicity, compromising patient safety.
Choice C reason: Seeking 40-mg tablets ignores expiration; even if available, current stock is outdated, and fresh supply is still required for reliable effect.
Choice D reason: Expired drugs (April 2013) lose potency; a new bottle ensures 40 mg of active furosemide, maintaining efficacy and safety for hypertension or edema.
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