Calculate the following dosage using the ratio and proportion method. Round the answer to the nearest tenth. Order: Heparin 17,000 units sub-cut daily
Available: Heparin labeled 20,000 units per mL
10ml
0.5ml
2.5 ml
0.9 ml
The Correct Answer is D
To solve this problem using the ratio and proportion method, we must set up a proportion with the ordered dose on one side and the available dose on the other. Then we cross-multiply and solve for the unknown quantity, which is the volume of heparin to be administered.
The proportion is:
17,000 units / x ml = 20,000 units / 1 ml Cross-multiplying gives:
17,000 * 1 = 20,000 * x
Solving for x gives:
x = 17,000 / 20,000
x = 0.85 ml
Therefore, the volume of heparin to be administered is 0.85 ml.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Step 1: Identify the given information
- Ordered dose = 6,000 units
- Available concentration = 5,000 units per 1 mL
Step 2: Set up the ratio and proportion equation
- 5,000 units ÷ 1 mL = 6,000 units ÷ X mL
Step 3: Solve for X
- (6,000 × 1) ÷ 5,000 = X
- 6,000 ÷ 5,000 = 1.2 mL
Step 4: Round to the nearest tenth
- 1.2 mL (already rounded)
Correct Answer is B
Explanation
To calculate the dosage, we need to use the formula:
Dosage (mL) = Ordered dose (mg) / Available dose (mg/mL)
Plugging in the given values, we get:
Dosage (mL) = 175 mg / 25 mg/mL
Simplifying, we get:
Dosage (mL) = 7 mL
Therefore, the dosage is 7 mL.
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