Dosage problem

Published

I do not understand how to work this out , I've tried three different ways and can not come to the answer that was given , PLEASE HELP ME!

The healthcare provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control device, how many ml of IV solution should the nurse add to dilute? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Up Vote Up Vote ×
Specializes in Complex pedi to LTC/SA & now a manager.

What do you have worked out so far ?

Up Vote Up Vote ×

Is the answer 20?

Up Vote Up Vote ×

no the answer is 16.8, I got at first also

Up Vote Up Vote ×

800/x:250/1

Up Vote Up Vote ×
Specializes in Med Surg.

LOL,

I misread the problem.

Good work.

Up Vote Up Vote ×
Specializes in Med Surg.

Adding 20 would give you 23.2 ml for a concentration of 34.5 mg/ml.

They love this type of problem where you have to account for the solution in the original dose.

Up Vote Up Vote ×
Specializes in Critical Care, ED, Cath lab, CTPAC,Trauma.

ok...the problem...

The healthcare provider prescribes an intermittent infusion of nafcillin (Unipen) 800 mg IV for a pediatric client. The drug is dispensed in a concentration of 250 mg/ml, and the recommended infusion concentration is 40 mg/ml. When adding the prescribed dose to the volume control device, how many ml of IV solution should the nurse add to dilute? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
So you

have: 250mg/ml

need: 800mg of the drug

How much of the drug will you need to equal a total of 800mgs?

Now if you have 800mg/___ml how many ml of diluent will you have to add to make a concentration of 40mg/ml.

Don't forget to subtract the amount of fluid/drug you started with.

Up Vote Up Vote ×
+ Join the Discussion