A client is ordered ampicillin 400mg IM every 6 hours. The vial is 500mg per vial.For IM use reconstitute using 1.8mL of diluent for a final concentration of 250mg per mL. How many milliliters would be drawn up for the injection? (Round to the nearest tenth. Use leading zero if it applies .Do not use a trailing zero.)
The Correct Answer is ["1.6"]
Step 1: Ordered dose = 400 mg
Step 2: Vial concentration after reconstitution = 250 mg/mL
Step 3: Set up the calculation: 400 mg ÷ 250 mg/mL
Step 4: Perform the division: 400 ÷ 250 = 1.6
Answer: 1.6 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.14"]
Explanation
Step 1: Identify the known values
- Dose ordered = 2 mcg/kg/day
- Frequency = every 12 hours → 2 doses per day
- Weight = 7 kg
- Concentration available = 0.05 mg/mL
Step 2: Calculate total daily dose in mcg
2 mcg × 7 kg = 14 mcg/day
Step 3: Divide daily dose by 2 to get per dose
14 mcg ÷ 2 = 7 mcg per dose
Step 4: Convert mcg to mg
7 mcg = 0.007 mg
Step 5: Use concentration to calculate mL per dose
0.007 mg ÷ 0.05 mg/mL = 0.14 mL
Answer: 0.14 mL
Correct Answer is ["25.0"]
Explanation
Total volume to infuse = 1000 mL
Total time = 8 hours × 60 minutes = 480 minutes
Drop factor = 12 gtts/mL
Multiply volume by drop factor: 1000 × 12 = 12,000
Divide result by time in minutes: 12,000 ÷ 480 = 25
Answer: 25 gtts/min
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