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 A
Explanation
Taking a rectal temperature requires a higher level of skill and carries a higher risk of injury compared to other methods, especially when dealing with a 2-year-old child with leukemia. Given the client's condition, it is important to minimize any potential harm or discomfort. Taking a tympanic temperature is a safer alternative that provides an accurate reading without the risk of injury.
B. Reminding the UAP to lubricate the thermometer before insertion is not appropriate because the PN should not encourage or support the UAP in performing a rectal temperature on a high-risk client. The focus should be on using a safer and less invasive method.
C. Instructing the UAP to report the results to the PN immediately is not necessary in this situation because the PN has already determined that taking a rectal temperature is not appropriate.
Instead, the PN should guide the UAP toward using the tympanic method.
D. Observing the UAP to ensure the thermometer is inserted correctly is not appropriate in this case because the PN has already determined that taking a rectal temperature is not the recommended course of action. It is more appropriate to redirect the UAP to use an alternative method.
Correct Answer is A
Explanation
This is the correct answer, as it reflects the nurse's assessment of the injury and the appropriate action to take. The nurse should consider the mother's report of pain as a valid indicator of the severity of the injury, and should not dismiss or minimize it. The nurse should also observe the boy's arm and shoulder for any signs of fracture, dislocation, swelling, bruising, or deformity, and ask him to rate his pain on a scale of 0 to 10. The nurse should then decide whether to refer the boy to a physician or an emergency department for further evaluation and treatment.
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