Digoxin injection is supplied in ampules of 500 mcg per 2 ml. how many milliliters must a nurse administer to provide a dose of 0.2 mg? img20.img 0.5 mg-2 sooring= 0r5mg 0 12mg = x 0.001x500mcg = 0.5 mg 0,2 mg x 2ml = 0.8ml 0.5 m

0.8 mL.

Explanation:

You need to know that the equivalence in mcg to mg is 1000 mcg are 1 mg; so 500 mcg are 0.5 mg. Now you know that there are 0.5 mg per 2 mL, so if you divide all by 2, you will know that you have 0.25 mg per mL. Now you applied a rule of three: ((0.2 mg)(1 ml))/(.25 mg) = 0.8 mL. So the nurse need to administer 0.8 mL to provide 0.2 mg of dose.

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