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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
To calculate the dosage using the ratio and proportion method, we need to set up a proportion that compares the ordered dose to the available dose. In this case, we have an order of 1.0 g of Amoxil and capsules labeled 250 mg per capsule. We can use the formula:
ordered dose / available dose = x / 1 capsule
where x is the number of capsules to administer. We need to convert the units to the same ones, so we can change 1.0 g to 1,000 mg. Then we can plug in the values and solve for x:
1,000 mg / 250 mg = x / 1 capsule
Cross-multiply and simplify:
250x = 1,000
x = 1,000 / 250
x = 4
Therefore, the number of capsules to administer is 4.
Correct Answer is B
Explanation
To solve this problem, we need to use the formula:
Rate (mL/hr) = Volume (mL) / Time (hr)
Plugging in the given values, we get:
Rate (mL/hr) = 100 mL / 0.75 hr
Rate (mL/hr) = 133.33 mL/hr
However, this is not the final answer because the equipment used is programmable in whole mL/hr, which means we need to round the rate to the nearest whole number. Therefore, we need to apply the rounding rule: if the decimal part is 0.5 or more, round up; if the decimal part is less than 0.5, round down. In this case, the decimal part is 0.33, which is less than 0.5, so we round down. This gives:
Rounded rate (mL/hr) = 133 mL/hr
Therefore, the correct flow rate is 133 mL/hr.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today