A physician orders 250 mg of a medication, but the medication available is 100 mg per 1 mL. Using fractional ratios, how many mL should be administered?
2.5 mL
25 mL
2.0 Ml
1.5 mL
The Correct Answer is A
Calculation using Ratio and Proportion
• Set up the Ratio and Proportion
Have (mg) / Quantity (mL) = Order mg / X (mL)
100 mg / 1 mL = 250 mg / X mL
• Solve for X (mL)
Cross-multiply and solve for X:
100 x X = 250 x 1
100X = 250
X = 250 / 100
X = 2.5
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. It provides the drug's therapeutic class: The therapeutic class describes the drug’s action or purpose but does not help in tracking specific batches for safety issues.
B. It shows the drug's generic name: The generic name identifies the medication but does not contribute to safety monitoring related to manufacturing or recall events.
C. It allows tracing of the drug for recalls: The lot number uniquely identifies a specific batch of medication. In the event of contamination, manufacturing errors, or recalls, the lot number enables healthcare providers and manufacturers to quickly trace and remove affected drugs, protecting patient safety.
D. It indicates the drug's dosage strength: Dosage strength informs proper administration but does not allow for tracing the medication in safety events or recalls.
Correct Answer is B
Explanation
Rationale:
A. Ask a colleague for their opinion: Consulting a colleague can provide guidance, but the final clarification must come from the prescriber to ensure the order is accurate and legally authorized.
B. Contact the prescriber to clarify the order: The nurse’s first responsibility is to verify any discrepancies with the prescriber. Clarifying the order ensures patient safety, prevents medication errors, and maintains compliance with legal and professional standards.
C. Adjust the dosage according to the label: Changing the dose without prescriber approval is unsafe and could lead to underdosing or overdosing, placing the patient at risk for adverse effects.
D. Administer the medication as it is labeled: Administering the medication without resolving the discrepancy can result in serious medication errors and compromise patient safety.
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