A nurse is preparing to administer cefazolin 250 n IM to a client. Available is cefazolin powder for injection 500 mg vial. The nurse reconstitutes the powder with 2 mL of sterile water for a concentration of 225 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 ["1.1"]
Determine the desired dosage:
The nurse needs to administer 250 mg of cefazolin.
Determine the volume per dose:
The concentration of the reconstituted cefazolin solution is 225 mg/mL.
The nurse needs to administer 250 mg per dose.
To find the volume per dose:
225 mg / 1 mL = 250 mg / x mL
Cross-multiplying gives us:
225x = 250
Dividing both sides by 225, we get:
x = 1.111 mL
Round the answer to the nearest tenth:
Rounding 1.111 to the nearest tenth gives us 1.1 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.1"]
Explanation
Determine the desired dosage:
The nurse needs to administer 100 mcg of cyanocobalamin.
Determine the volume per dose:
The cyanocobalamin injection contains 1000 mcg per 1 mL.
The nurse needs to administer 100 mcg per dose.
To find the volume per dose, we can set up a proportion:
1000 mcg / 1 mL = 100 mcg / x mL
Cross-multiplying gives us:
1000x = 100
Dividing both sides by 1000, we get:
x = 0.1 mL
Correct Answer is ["1.8"]
Explanation
Convert the client's weight from pounds to kilograms:
There are 2.205 pounds in 1 kilogram.
154 lb = 154 lb / 2.205 lb/kg = 70 kg (rounded to the nearest whole number).
Determine the total dosage:
The client is prescribed 1 mg/kg of gentamicin.
The client weighs 70 kg.
The total dosage is 1 mg/kg x 70 kg = 70 mg.
Determine the volume per dose:
The gentamicin solution contains 40 mg per 1 mL.
The nurse needs to administer 70 mg per dose.
To find the volume per dose:
40 mg / 1 mL = 70 mg / x mL
Cross-multiplying gives us:
40x = 70
Dividing both sides by 40, we get:
x = 1.75 mL
Round the answer to the nearest tenth:
Rounding 1.75 to the nearest tenth gives us 1.8 mL.
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