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: Right patient ensures identity verification; errors here cause harm via misadministration, as drugs affect individuals differently based on physiology and condition.
Choice B reason: Right drug prevents wrong medication errors; each drug’s pharmacokinetics targets specific issues, and mistakes disrupt therapy or cause adverse reactions.
Choice C reason: Color isn’t a standard right; it’s not a reliable identifier, as formulations vary, and clinical safety relies on name, dose, and route, not appearance.
Choice D reason: Right route ensures correct delivery (e.g., IV vs. oral); wrong routes alter bioavailability and onset, risking toxicity or inefficacy per drug design.
Choice E reason: Right time optimizes efficacy; timing aligns with drug half-life and patient needs, preventing under- or overdosing from improper administration schedules.
Correct Answer is A
Explanation
Choice A reason: Herbal remedies lack FDA safety data; in pregnancy, untested substances risk fetal harm (e.g., teratogenicity), making this a critical caution.
Choice B reason: Claiming safety is false; many herbs (e.g., St. John’s Wort) affect pregnancy adversely, and without evidence, this misleads the patient dangerously.
Choice C reason: Consistency isn’t required; herbal products vary widely in potency, and this false assurance ignores regulatory gaps in supplement standardization.
Choice D reason: Labels help, but warnings are inconsistent; this shifts responsibility without addressing the lack of proven safety, a more pressing prenatal concern.
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