A nurse is preparing to administer an intramuscular injection for a client of average weight. At what angle would the nurse insert the needle?

90-degree

45-degree

15-degree

25-degree

Answer and Explanation

The Correct Answer is A

Choice A reason: IM injections use a 90-degree angle; this ensures deep muscle penetration for average-weight adults, optimizing drug absorption into vascular tissue.

Choice B reason: 45 degrees is for subcutaneous injections; it’s too shallow for IM, risking fat deposition instead of muscle, reducing efficacy in this context.

Choice C reason: 15 degrees is far too shallow; it’s not a standard angle, likely depositing drug in skin layers, failing to reach muscle for intended absorption.

Choice D reason: 25 degrees mimics subcutaneous; it doesn’t reach muscle depth, compromising IM delivery and therapeutic effect in an average-weight client.

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Correct Answer is A

Explanation

Choice A reason: Flow rate is volume divided by time; 250 mL over 4 hours equals 62.5 mL/hr, ensuring safe transfusion pacing to avoid fluid overload or hemolysis.

Choice B reason: 125 mL/hr assumes 250 mL over 2 hours; this doubles the ordered rate, risking circulatory overload and transfusion reactions in a standard protocol.

Choice C reason: 250 mL/hr infuses the unit in 1 hour; this rapid rate exceeds safe limits, potentially causing hypertension or pulmonary edema in vulnerable patients.

Choice D reason: 500 mL/hr is far too fast, implying 250 mL in 30 minutes; this dangerous speed could trigger severe hemolytic reactions or cardiovascular collapse.

A. 8:30 a.m. B. 9:00 a.m. C. 10:00 a.m. D. 10:30 a.m.

Correct Answer is B

Explanation

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.

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A nurse is preparing to administer an intramuscular injection for a client of average weight. At what angle would the nurse insert the needle?

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Naxlex Comprehensive Predictor Exams

The physician gives orders to infuse 1 unit (250 mL) of packed red blood cells over 4 hours. Calculate the flow rate in milliliters per hour.

Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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