A caring for a client who has schizophrenia and is experiencing hallucinations. The provider prescribes chlorpromazine 50 mg IM every 4 hr as needed. Available is chlorpromazine injection 25 mg/mL. How many mL should the nurse administer per dose? (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 ["2"]
Given:
Desired dose: Chlorpromazine 50 mg IM
Available concentration: Chlorpromazine injection 25 mg/mL
To find:
Volume to administer per dose (in mL)
Step 1: Set up the proportion
We can use the following proportion to solve the problem:
(Desired dose) / (Available concentration) = Volume to administer
Step 2: Substitute the values
Plugging in the given values, we get:
(50 mg) / (25 mg/mL) = Volume to administer
Step 3: Simplify
To simplify, we can invert the denominator and multiply:
(50 mg) x (1 mL / 25 mg) = Volume to administer
The "mg" units cancel out, leaving us with:
(50 x 1 mL) / 25 = Volume to administer
Step 4: Calculate
Performing the multiplication and division, we get:
50 mL / 25 = Volume to administer
2 mL = Volume to administer
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["12"]
Explanation
Given:
Desired infusion rate: 1,200 units/hr
Available concentration: Heparin 25,000 units in 250 mL DSW
To find:
Infusion rate (mL/hr)
Step 1: Calculate the concentration of heparin in mL/hr
Concentration (units/mL) = Total units / Total volume
Concentration (units/mL) = 25,000 units / 250 mL = 100 units/mL
Step 2: Calculate the infusion rate in mL/hr
Infusion rate (mL/hr) = Desired infusion rate (units/hr) / Concentration (units/mL)
Infusion rate (mL/hr) = 1,200 units/hr / 100 units/mL = 12 mL/hr
Correct Answer is ["5"]
Explanation
Given:
Desired dose: Metoprolol 5 mg IV bolus
Available concentration: Metoprolol injection 1 mg/mL
To find:
Volume to administer per dose (in mL)
Step 1: Set up the proportion
(Desired dose) / (Available concentration) = Volume to administer
Step 2: Substitute the values
Plugging in the given values, we get:
(5 mg) / (1 mg/mL) = Volume to administer
Step 3: Simplify
To simplify, we can invert the denominator and multiply:
(5 mg) x (1 mL / 1 mg) = Volume to administer
The "mg" units cancel out, leaving us with:
(5 x 1 mL) / 1 = Volume to administer
Step 4: Calculate
Performing the multiplication and division, we get:
5 mL / 1 = Volume to administer
5 mL = Volume to administer
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