A nurse is preparing to administer darbepoetin 0.75 mcg/kg IV bolus to a client who weighs 138 lb. Available is darbepoetin 60 mcg/0.3 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.2"]
Convert the Client's Weight from Pounds to Kilograms:
1 kg = 2.205 lbs
Weight in kg = 138 lbs / 2.205 lbs/kg
Weight in kg ≈ 62.585 kg
Calculate the Total Dose of Darbepoetin Needed:
Dose = 0.75 mcg/kg x 62.585 kg
Dose ≈ 46.93875 mcg
Calculate the Volume of Darbepoetin to Administer:
Available concentration = 60 mcg/0.3 mL
To simplify, find the concentration per 1 mL: 60 mcg / 0.3 mL = 200 mcg/mL
Volume (mL) = Desired dose (mcg) / Available concentration (mcg/mL)
Volume (mL) = 46.93875 mcg / 200 mcg/mL
Volume (mL) ≈ 0.23469 mL
Round to the Nearest Tenth:
0.2 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["60"]
Explanation
Understanding the Problem
Order: Lidocaine 4 mg/min
Available Solution: Lidocaine 1 g in 250 mL of D5W
Desired Rate: mL/hr
Step 1: Convert Grams (g) to Milligrams (mg)
1 g = 1000 mg
Available Lidocaine: 1 g x 1000 mg/g = 1000 mg
Step 2: Determine the Concentration of the Lidocaine Solution
Available Lidocaine: 1000 mg
Solution Volume: 250 mL
Concentration: 1000 mg / 250 mL = 4 mg/mL
Step 3: Calculate the Infusion Rate in mL/min
Ordered Dose: 4 mg/min
Concentration: 4 mg/mL
Infusion Rate: 4 mg/min / 4 mg/mL = 1 mL/min
Step 4: Convert Infusion Rate to mL/hr
Infusion Rate: 1 mL/min
Minutes in an Hour: 60 min
Infusion Rate in mL/hr: 1 mL/min x 60 min/hr = 60 mL/hr
Step 5: Round to the Nearest Whole Number
The calculated rate is 60 mL/hr, which is already a whole number.
Final Answer: 60 mL/hr
Correct Answer is ["0.25"]
Explanation
Order: Filgrastim 250 mcg (micrograms)
Desired Unit: mg (milligrams)
Step 1: Conversion Factor
We need to know the relationship between micrograms (mcg) and milligrams (mg).
1 mg = 1000 mcg
Step 2: Set Up the Conversion
We want to convert 250 mcg to mg. To do this, we'll divide the given dose (250 mcg) by the conversion factor (1000 mcg/mg):
250 mcg x (1 mg / 1000 mcg)
Step 3: Perform the Calculation
Multiply the numerators: 250 x 1 = 250
Multiply the denominators: 1 x 1000 = 1000
Divide the result: 250 / 1000 = 0.25
Step 4: Answer with Correct Units and Rounding
The result is 0.25 mg.
The problem asks us to round to the nearest hundredth, which we already have (0.25).
The problem also states to use a leading zero if it applies (which it does) and not use a
trailing zero (which we don't have).
Answer: 0.25 mg
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