# Math Help

1. I can't seem to understand how to set up this math problem. The answer is suppose to be 0.5mL. Help Please!

The physician has ordered Heparin at 2 units/mL to run at 5 mL/hour to be added to your child’s IV solution of NS in order to keep your child’s central line patent. The Heparin vial reads: 1000 units per mL. How many mL’s of heparin will you add to the 250 mL bag of Normal Saline IV fluids ?
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4. Quote from nursing808
I can't seem to understand how to set up this math problem. The answer is suppose to be 0.5mL. Help Please!

The physician has ordered Heparin at 2 units/mL to run at 5 mL/hour to be added to your child’s IV solution of NS in order to keep your child’s central line patent. The Heparin vial reads: 1000 units per mL. How many mL’s of heparin will you add to the 250 mL bag of Normal Saline IV fluids ?
Break the problem down into steps

First step is what is your order?

2 units / ml

Now what do you have?

A 250 ml bag of normal saline

How many units of Heparin do you need in a 250 ml bag of saline to have 2 units / ml?

Now you know how many units you need to add to the saline.

What do you think is the next step.

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