ATI PN Dosage Calculations. Adult medical surgical proctored assessment 3.1
ATI PN Dosage Calculations. Adult medical surgical proctored assessment 3.1 ( 25 Questions)
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Question 11 :
A nurse is preparing to administer cefazolin 500 mg IM every 8 hr. Available is cefazolin 1 g vial. The package insert instructs adding sterile water 2.5 mL to yield cefazolin 330 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: ["1.5"]
To calculate the dosage of cefazolin, the nurse needs to use the following formula:
Dose (mL) = Ordered dose (mg) / Available dose (mg/mL)
Plugging in the values from the question, we get:
Dose (mL) = 500 mg / 330 mg/mL
Dose (mL) = 1.515 mL
Rounding to the nearest tenth, the nurse should administer 1.5 mL of cefazolin per dose.