A nurse is preparing to administer diphenhydramine 40 mg IM to a client who has allergies. Available is diphenhydramine injection 50 mg/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 ["0.8"]
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
40 mg / Volume = 50 mg/mL
Step 3: Solve for the unknown volume:
Volume = 40 mg / 50 mg/mL
Step 4: Calculate the volume:
Volume = 0.8 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["50"]
Explanation
Desired dose of magnesium sulfate: 2 g/hr
Concentration of magnesium sulfate solution: 40 g in 1,000 mL
Step 1: Calculate the desired volume of magnesium sulfate per hour:
Volume of magnesium sulfate per hour = Desired dose (g/hr) / Concentration (g/mL)
Volume of magnesium sulfate per hour = 2 g/hr / (40 g / 1,000 mL)
Volume of magnesium sulfate per hour = 2 g/hr / 0.04 g/mL
Volume of magnesium sulfate per hour = 50 mL/hr
Correct Answer is ["0.8"]
Explanation
Given:
Desired dose of estradiol cypionate: 4 mg
Concentration of estradiol cypionate injection: 5 mg/mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
4 mg / Volume = 5 mg/mL
Step 3: Solve for the unknown volume:
Volume = 4 mg / 5 mg/mL
Step 4: Calculate the volume:
Volume = 0.8 mL
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