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 B
Explanation
Choice A rationale:
Leaving the client alone to give them space is not an appropriate intervention for a client with depression and a history of suicide attempts. Isolation can increase feelings of hopelessness and despair, potentially leading to self-harm or suicidal thoughts.
Choice B rationale:
Removing any potential means of self-harm from the client's environment is the most essential intervention in this scenario. It is crucial to ensure the client's safety by eliminating access to items or substances that could be used for self-harm, such as medications, sharp objects, or other dangerous items. This intervention helps reduce the immediate risk of harm.
Choice C rationale:
Encouraging the client to confront their feelings of hopelessness is important in the long term, as it can be part of therapeutic interventions. However, it should not be the immediate priority when the client is at risk of self-harm. Ensuring their safety is paramount.
Choice D rationale:
Telling the client that they should be grateful for what they have is not an appropriate intervention. It can be perceived as dismissive of their feelings and may worsen their sense of hopelessness and isolation.
Correct Answer is ["21"]
Explanation
The correct answer is 21 gtt/min,
To calculate the flow rate (in gtt/min), you can use the following formula: Flow rate (gtt/min) = (Volume to be infused in mL ÷ Time in minutes) × Drop factor (gtt/mL) In this case, the volume to be infused is 1 liter, which is equivalent to 1000 mL. The time for infusion is 12 hours, which is equivalent to 720 minutes. The drop factor is given as 15 gtt/mL. Flow rate (gtt/min) = (1000 mL ÷ 720 min) × 15 gtt/mL = (1.39 gtt/min) × 15 gtt/mL ≈ 20.83 gtt/min Rounded to the nearest whole number, the nurse should regulate the infusion at 21 gtt/min.
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