A nurse is preparing to administer chlorpromazine 0.55 mg/kg IM to a child who weighs 66 lb. Available is chlorpromazine 25 mg/ml. for injection. 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 ["0.7"]
To calculate the dose of chlorpromazine for a child who weighs 66 lb, first convert the weight to kilograms by dividing by 2.2.
This gives 66 / 2.2 = 30 kg.
Then multiply the weight by the prescribed dose of 0.55 mg/kg to get the total dose in milligrams: 30 x 0.55 = 16.5 mg.
Finally, divide the total dose by the concentration of the injection solution to get the volume in milliliters: 16.5 / 25 = 0.66 ml.
The nurse should administer 0.7 ml of chlorpromazine IM to the child.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.5"]
Explanation
To calculate the dosage of cefazolin, the nurse needs to use the following formula:
Dose (mL) = Ordered dose (mg) / Available dose (mg/mL)
Plugging in the values from the question, we get:
Dose (mL) = 500 mg / 330 mg/mL
Dose (mL) = 1.515 mL
Rounding to the nearest tenth, the nurse should administer 1.5 mL of cefazolin per dose.
Correct Answer is ["2"]
Explanation
To give the correct dose of levothyroxine, the nurse needs to calculate how many tablets of 75 mcg are equivalent to 150 mcg. The nurse can use a proportion to solve this problem. Let x be the number of tablets to administer. Then, the proportion is:
75 mcg / 1 tablet = 150 mcg / x tablets
Cross-multiplying, we get:
75x = 150
Dividing both sides by 75, we get:
x = 2
Therefore, the nurse should administer 2 tablets of levothyroxine 75 mcg to give a total of 150 mcg.
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