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
A. Reporting any drainage observed around the gastrostomy tube insertion site is important for monitoring potential infection or complications; however, it is not the most immediate concern during a total bed bath.
B. While using plenty of pillows to position the client on the side after bathing is important for comfort and skin integrity, it does not address the safety of the feeding during the bath.
C. Keeping the head of the bed raised while the tube feeding is infusing is the most critical instruction. This position helps prevent aspiration and ensures that the feeding is administered safely while maintaining the client’s airway during the bathing process.
D. Raising the entire bed while bathing the client is helpful for the caregiver's ergonomics but does not take precedence over ensuring the client’s safety regarding the gastrostomy tube feeding.
Correct Answer is B
Explanation
A. Using a cushion when sitting may provide comfort, but it does not directly address the client's elevated blood pressure or changes in mental status related to chronic kidney disease (CKD).
B. Weighing every morning is crucial in managing CKD, particularly with elevated blood pressure, as it helps monitor fluid retention, which can indicate worsening kidney function or fluid overload. This intervention is essential for assessing the client's condition and adjusting treatment as needed.
C. Performing range of motion exercises is important for maintaining mobility, especially in an immobile client; however, it does not directly address the pressing issues of elevated blood pressure and altered mental status.
D. Documenting abdominal girth can be important for assessing fluid retention, but it is less immediate than daily weight monitoring for a client with CKD showing significant symptoms.
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