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. The 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"]
The concentration of cefazolin after reconstitution can be calculated as follows: Concentration = Total amount of drug / Total volume after reconstitution
Since the available vial contains 1 gram (1000 mg) of cefazolin and the total volume after reconstitution is 2.5 mL, we can calculate the concentration:
Concentration = 1000 mg / 2.5 mL = 400 mg/mL
Therefore, after reconstitution, the concentration of cefazolin is 400 mg/mL.
To administer a dose of 400 mg, we divide the desired dose by the concentration: Volume to administer = Desired dose / Concentration
Volume to administer = 400 mg / 400 mg/mL = 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
This is the action that the PN should take if they believe that a prescription for a child is incorrect because the dosage prescribed is the usual adult dosage. Calling the healthcare provider and clarifying the prescription is the safest and most effective way to prevent medication errors and ensure the child's safety. The PN should not administer the medication until they are sure that it is correct and appropriate for the child.
Correct Answer is D
Explanation
This is the action that the PN should implement when assessing a client with an indwelling urinary catheter and observing that the catheter drainage bag, which is half-full, is attached to the side rail and the tubing is looped on the bed. Attaching the drainage bag to the bed frame ensures that the bag is below the level of the bladder and prevents backflow of urine, which can cause infection or obstruction. The PN should also straighten the tubing and avoid any kinks or loops that may interfere with the drainage.
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