The practical nurse (PN) is preparing cefazolin 400 mg IM for a client with a gram-positive infection. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, for IM use, add 2 mL sterile water for injection. Total volume after reconstitution is 2.5 mL. After reconstitution, how many mL should be administered to the client? (Enter numeric value only. If rounding is required, round to the whole number, nearest tenths/hundredth).
The Correct Answer is ["1"]
This is the correct answer because the concentration of cefazolin after reconstitution is 1 gram/2.5 mL, which is equivalent to 400 mg/1 mL. Therefore, to administer 400 mg of cefazolin, the PN should draw up 1 mL of the reconstituted solution. This can be calculated using the formula:
Desired dose / Available dose = Volume to administer
400 mg / 1000 mg = x mL / 2.5 mL
x = (400 x 2.5) / 1000
x = 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice D rationale:
Taking zolpidem before bedtime is the correct information to include in the education. Zolpidem is a medication used for the short-term treatment of insomnia and should be taken immediately before going to bed to facilitate sleep onset.
Choice A rationale:
Crushing zolpidem to increase absorption is not recommended. The medication should be taken whole and not crushed or chewed.
Choice B rationale:
Storing zolpidem at room temperature is correct. Like many medications, zolpidem should be stored at a controlled room temperature, away from moisture and heat.
Choice C rationale:
Administering zolpidem with a meal is not necessary and may delay the onset of its effects. It is typically taken on an empty stomach for faster absorption.
Correct Answer is A
No explanation
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