Need help with this IV calc!

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Specializes in oncology.

okay i've been trying to figure this one out and i keep getting a different answer. the problem is:

you are to give vancomycin iv 2gm piggyback over 2 hours. the iv bag reads

d5/0.45% saline 250ml

medication added: vancomycin 2gm/10ml

what rate will you set your pump?

the answer sheet says it's 130 cc/hr but i keep getting 125... so i'm not sure how to get 130!

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250 +10 = 260 mL

260 mL/2 hrs = 130 mL/hr

You have to count what you added to get a total...

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Specializes in Obstetrics.

how are you doing the problem?

here's how i do it:

i use the formula mlx60min/time to be infused.

so, you know you're going to give 10ml of vanc (because 2gm is ordered and the bag says 2gm/10ml) and ml is your vehicle. your bag is 250ml but you have 10ml of vanc to add to the bag which will increase the volume inside of the bag to 260 (250ml+10ml). then you plug in the formula 260ml x 60 min= 15600 divided by 120 minutes (time to be infused)= 130ml/hr. does that make any sense? if you remember the formula for ivpb meds, it's not too terrible.

so again.... volume x 60 min= y divide y by number of minutes to be infused (ie: 30, 60, 120 etc). hope it helped a bit :) good luck.

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