Medicine Reconstitution, HELP!

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I am having a problem calculating reconstitution math problems. Here are two math problems that seem easy, I just do not understand the problems?

1. A vial of cefazolin contains 1.2 mL of powder. The total volume of the vial when the powder is reconstituted is 10 mL. What is the amount of sterile water needed to reconstitute the powder?

2. Cefazolin is supplied in 1 gram vials of powder which is reconstituted with 2.5 mL of NaCl for injection for a final volume of 3 mL. What is the approximate concentration of Cefazolin in each milliliter?

Specializes in Med/surg, Quality & Risk.
I am having a problem calculating reconstitution math problems. Here are two math problems that seem easy, I just do not understand the problems?

1. A vial of cefazolin contains 1.2 mL of powder. The total volume of the vial when the powder is reconstituted is 10 mL. What is the amount of sterile water needed to reconstitute the powder?

Who came up with this question? I would overthink that one because I have never seen powder measured in mL's. The vial usually says to reconstitute with a certain amount of sterile water or NS.

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