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.
62.5 mL/hr
125 mL/hr
250 mL/hr
500 mL/hr
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Blood aspiration indicates vascular entry; discarding prevents IV administration of a drug meant for another route, avoiding rapid absorption risks or contamination.
Choice B reason: Giving despite blood risks unintended IV delivery; drugs like IM injections aren’t formulated for this, potentially causing toxicity or embolism.
Choice C reason: Changing the needle doesn’t address blood-mixed medication; it remains unsafe for injection, as the dose is compromised and potentially contaminated.
Choice D reason: Omitting skips treatment unnecessarily; the issue is procedural, not the order, and restarting ensures the patient receives the intended therapy safely.
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.
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