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• Specializes in M/S, Tele, Sub (stepdown), Hospice. Has 13 years experience.

A 2 year old, 10 kg patient has Fortaz 450 mg q 8 hours IVPB ordered. Dilute to a concentration of 40mg/ml. Infuse over 15 to 30 minutes.

How many mg/day is your patient receiving? 450mg x 3 = 1350mg/day

Calculate the actual daily dose (mg/kg/day). 1350mg/day divided by 10kg = 135 mg/kg/day

How much fluid should be added to the powder in a 500mg Fortaz vial to reconstitute to a concentration (undiluted volume) of 100mg/ml?

500 mg times 1 ml / 100 mg = 500/100 = 5 ml

What volume (ml) is needed for one 450 mg dose of Fortaz diluted to a concentration of 100 mg/ml?

450 mg times 1 ml / 100 mg = 450/100 = 4.5 ml

Calculate the total volume needed to dilute this medication to a final concentration of 40 mg/ml.

450mg times 1 ml / 40 mg = 450/40 = 11.25 ml

Calculate the IV pump rate to deliver the Fortaz (final concentration of 40 mg/ml) over 20 minutes.

11.25 ml / 20 minutes times 60 minutes / 1 hour = 675/20 = 33.75 or 34 ml/hr

I feel like I'm missing a lot of steps. Any help would be appreciated :heartbeat

815 Posts

Has 4 years experience.

Glanced over it quickly, seems all good to me.

323 Posts

Specializes in M/S, Tele, Sub (stepdown), Hospice. Has 13 years experience.

Anyone.....help...?!

815 Posts

Has 4 years experience.

That all seems correct to me, no steps missed at all. The only thing, when you got 11.25, I would just make it 11.3ml. That would make you get 33.9, which is still 34ml/hr. But you didn't miss any steps.

323 Posts

Specializes in M/S, Tele, Sub (stepdown), Hospice. Has 13 years experience.

:rcgtku:

220 Posts

Make sure you know what your school does for rounding rules. Our school would leave all answers to the hundredths since this is what you would see in reality on a Peds floor. IV pumps can be programmed to run in hundredths and medications can be drawn up to the hundredths spot using an oral syringe.

815 Posts

Has 4 years experience.

That's a good point. Even at my school, some different teachers want their OWN rounding rules to apply on their tests.

323 Posts

Specializes in M/S, Tele, Sub (stepdown), Hospice. Has 13 years experience.

Our first class is in a couple of weeks so I'll find out exactly what the rounding rules are.