Calculate the dosage. Round to the nearest tenth place.
Order: Atropine 1.0 mg IM Stat.
Available: Atropine 0.4 mg/mL
1 ml
1.3 ml
2.5 ml
4 ml
The Correct Answer is C
Step 1: Identify the given information
- Ordered dose = 1.0 mg
- Available concentration = 0.4 mg per 1 mL
Step 2: Use the ratio and proportion method
Required dose ÷ Available concentration = Volume to administer
Step 3: Plug in the values
= (1.0 ÷ 0.4)
Step 4: Solve step by step
- 1.0 ÷ 0.4 = 2.5 mL
Step 5: Round to the nearest tenth
- 2.5 mL (already rounded)
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Related Questions
Correct Answer is A
Explanation
To calculate the dosage using the ratio and proportion method, we need to set up a proportion with the ordered dose and the available dose as follows:
Ordered dose (units) / Dosage (mL) = Available dose (units) / Available volume (mL)
Plugging in the given values, we get:
8,500 units / Dosage (mL) = 50,000 units / 5 mL
Cross-multiplying, we get:
50,000 units x Dosage (mL) = 8,500 units x 5 mL
Solving for Dosage (mL), we get:
Dosage (mL) = (8,500 units x 5 mL) / 50,000 units
Simplifying, we get:
Dosage (mL) = 42,500 mL / 50,000
Therefore, the dosage is 0.85 mL.
Correct Answer is C
Explanation
Step 1: Identify the given information
- Total volume to infuse = 100 mL
- Infusion time = 30 minutes
- Drop factor = 60 gtt/mL
Step 2: Use the formula for flow rate
Flow rate (gtt/min) = (Total Volume (mL) × Drop Factor (gtt/mL)) ÷ Infusion Time (min)
Step 3: Plug in the values
= (100 × 60) ÷ 30
Step 4: Solve step by step
- 100 × 60 = 6000
- 6000 ÷ 30 = 200
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