Ati dosage calculation Rn fundamentals proctored assessment 3.2
Calculation
A nurse is preparing to administer cefazolin 250 mg IM to a client. Available is cefazolin powder for injection 500 mg vial. The nurse reconstitutes the powder with 2 mL of sterile water for a concentration of 225 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
mL
Explanation & Rationale
Identify the given information: Dose of cefazolin: 250 mg Concentration of cefazolin injection: 225 mg/mL Calculate the volume of cefazolin injection to be administered: Volume = Dose (mg) / Concentration (mg/mL) Substitute the values: Volume = 250 mg / 225 mg/mL Volume ≈ 1.11 mL Round the answer to the nearest tenth: Volume ≈ 1.1 mL
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