Order: Magnesium sulfate 1 g in 100 mL 0.9% sodium chloride to infuse over 2 hours. How many mL/hr will you administer?
40 mL/hr
50 mL/hr
60 mL/hr
75 mL/hr
The Correct Answer is B
Calculation:
- Identify the total volume and infusion time
Total Volume: 100 mL
Infusion Time: 2 hours
- Calculate the infusion rate
Infusion Rate (mL/hr) = Total Volume ÷ Time
Infusion Rate = 100 ÷ 2
= 50 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Calculation:
- Identify the total volume and infusion time
Total Volume: 500 mL
Infusion Time: 4 hours
- Calculate the infusion rate
Infusion Rate (mL/hr) = Total Volume ÷ Time
Infusion Rate = 500 ÷ 4
= 125 mL/hr
Correct Answer is B
Explanation
A. Monitor the client's respiratory rate every 15 minutes: Frequent respiratory monitoring is essential for opioids or medications with sedative effects, but it does not directly measure pain relief or effectiveness of the analgesic.
B. Ask the client to rate their pain on a scale from 0 to 10 after one hour: Evaluating pain using a standardized numeric scale allows the nurse to determine the medication’s effectiveness. Oral analgesics typically take about 30–60 minutes to achieve peak effect, making this timing appropriate for reassessment.
C. Schedule a follow-up assessment for the next day: Waiting until the next day would delay recognition of inadequate pain control or need for intervention. Pain assessment should be timely to ensure client comfort and safety.
D. Immediately contact the provider for additional prescriptions: Contacting the provider is premature before evaluating whether the administered medication was effective. Reassessment guides appropriate follow-up action.
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