# Dosage Calculation help needed

1. Hi all,
I am in need of someone to look at a practice problem that I am working on for an upcoming dosage calc. test that I have coming up next week to see if I am on the right track for solving the problem and if I am not on the right track can you direct this weary nursing students path?

The physician has prescribed cefoxitin sodium (Mefoxin) 800 mg IVPB every 12 hours via an electronic infusion device. On hand is a 1 gram vial that reads: "Add 2 mL of diluent to provide a total solution of 2.5 mL." The instructions for IVPB administration suggest adding the Mefoxin to 100 mL of D5W to be administered over 1 hour. The drop factor of the IV set is 60 drops per mL.

How many mL of Mefoxin 1g/2.5 mL should be added to the 100 mL of D5W?
my answer : 2 mL is this right?

xml= 800mg/1g x 1g/1000mg x 2.5ml = 2 ml

How many drops per minute should the IVPB infuse? 100 gtt/min is this right?

xgtts/min=100 ml/hr x 60 gtts/ml x 1hr/60 mins = 100 gtts/min is this right?

What hourly rate should be set on the electronic infusion device? 100 mL/hr is this right?
I tried not to use all of the info but just what I thought was important, but just not too sure if I am doing it right! Thank you in advance for any assistance given!
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Joined: Jan '14; Posts: 100; Likes: 139

3. Every single thing: Correct. Good work.

(This is so refreshing!)

4. Quote from Qteapi
Hi all, I am in need of someone to look at a practice problem that I am working on for an upcoming dosage calc. test that I have coming up next week to see if I am on the right track for solving the problem and if I am not on the right track can you direct this weary nursing students path? The physician has prescribed cefoxitin sodium (Mefoxin) 800 mg IVPB every 12 hours via an electronic infusion device. On hand is a 1 gram vial that reads: “Add 2 mL of diluent to provide a total solution of 2.5 mL.” The instructions for IVPB administration suggest adding the Mefoxin to 100 mL of D5W to be administered over 1 hour. The drop factor of the IV set is 60 drops per mL. How many mL of Mefoxin 1g/2.5 mL should be added to the 100 mL of D5W? my answer : 2 mL is this right? xml= 800mg/1g x 1g/1000mg x 2.5ml = 2 ml How many drops per minute should the IVPB infuse? 100 gtt/min is this right? xgtts/min=100 ml/hr x 60 gtts/ml x 1hr/60 mins = 100 gtts/min is this right? What hourly rate should be set on the electronic infusion device? 100 mL/hr is this right? I tried not to use all of the info but just what I thought was important, but just not too sure if I am doing it right! Thank you in advance for any assistance given!
Thank you Grn tea.....I had a headache from trying to figure it out! Now to go try to figure out the other 5 problems just like it...can't figure out why the questions have to be so wordy and tricky!
5. Well done!