Hesi rn medical surgical nursing proctored exam
Calculation
The healthcare provider prescribes cefazolin 800 mg IM every six hours. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, For IM use add 2.5 mL sterile water for Injection to provide a total volume of 3.0 mL. After reconstitution, the solution contains how many mg/mL? Enter numeric value only. If rounding is required, round to the nearest whole number.)
mg/mL
Explanation & Rationale
One gram is equivalent to 1000 mg. If you add 2.5 mL of sterile water to the vial as instructed, the total volume of the solution becomes 3.0 mL. Therefore, the concentration of the solution is 1000 mg divided by 3 mL, which equals approximately 333.33 mg/mL.
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