A nurse is preparing to administer enalapril at 5 mg IV bolus. Available is enalapril injection 25 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["4"]
Identify the Desired Dose and Available Concentration:
Desired Dose: 5 mg of enalapril
Available Concentration: 1.25 mg/mL (This means there are 1.25 mg of enalapril in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 5 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 5 mg / 1.25 mg/mL
Volume (mL) = 4 mL
Round to the Nearest Whole Number (if necessary):
4 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["4"]
Explanation
Identify the Desired Dose and Available Concentration:
Desired Dose: 10 mg of verapamil
Available Concentration: 5 mg/2 mL
Simplify the Available Concentration:
To make the calculation easier, find the concentration per 1 mL: 5 mg / 2 mL = 2.5 mg/mL (This means there are 2.5 mg of verapamil in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 10 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 10 mg / 2.5 mg/mL
Volume (mL) = 4 mL
Round to the Nearest Whole Number (if necessary):
4 mL
Correct Answer is ["1.9"]
Explanation
Order: Dexamethasone 0.5 mg/kg/day IM, divided equally every 6 hours
Client Weight: 132 lbs
Available Solution: Dexamethasone 4 mg/mL
Desired Dose: mL per dose
Step 1: Convert Client Weight to Kilograms (kg)
1 kg = 2.2 lbs
Client Weight in kg: 132 lbs / 2.2 lbs/kg = 60 kg
Step 2: Calculate the Total Daily Dose
Ordered Dose: 0.5 mg/kg/day
Client Weight: 60 kg
Total Daily Dose: 0.5 mg/kg/day x 60 kg = 30 mg/day
Step 3: Determine the Number of Doses per Day
Doses are given every 6 hours.
Hours in a Day: 24 hours
Number of Doses: 24 hours / 6 hours/dose = 4 doses
Step 4: Calculate the Dose per Administration
Total Daily Dose: 30 mg/day
Number of Doses: 4 doses
Dose per Administration: 30 mg / 4 doses = 7.5 mg/dose
Step 5: Calculate the Volume to Administer per Dose
Dose per Administration: 7.5 mg
Concentration: 4 mg/mL
Volume to Administer: 7.5 mg / 4 mg/mL = 1.875 mL
Step 6: Round to the Nearest Tenth
The calculated volume is 1.875 mL.
Rounded to the nearest tenth: 1.9 mL
Answer: 1.9 mL
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