Calculating IV Solution Concentration
[Pages:4]Slide 2
Nsg 231 Calculating IV Solution Concentration
Calculating IV Solution Concentration
The concentration of a solution describes the mass of the solute (amount of drug) divided by the volume of solution.
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Nsg 231 Calculating IV Solution Concentration
Slide 3
Calculating IV Solution Concentration
The concentration of a solution describes the mass of the solute (amount of drug) divided by the volume of solution.
400 mg
400 mg = 4 mg/ml 100 ml
100 ml
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Nsg 231 Calculating IV Solution Concentration
Slide 4
Calculating IV Solution Concentration
Example 1 You have an IV preparation of 500 milligrams of lidocaine HCL (Xylocaine) in 5% D/W. The final solution has a volume of 250 ml. You realize that the IV solution contains ____ mg of lidocaine HCL per ml. To find the mg/ml:
Step 1 ? Write down the amount of drug added as the numerator Step 2 ? Write down the volume of the solution in the denominator Step 3 ?Perform the math
Step 1 Step 2
Step 3
500 mg = 2 mg 250 ml ml
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Nsg 231 Calculating IV Solution Concentration
Slide 5
Calculating IV Solution Concentration
Example 2 500 ml of IV fluid contains 0.02 mg of morphine sulfate per ml. The solution was prepared by adding morphine to dextrose 5% in water. How many mg of morphine are contained in the solution?
To find the total milligrams in the solution:
Step 1 ? Write down the volume of the solution Step 2 ? Write down the strength of the solution Step 3 - Reduce the units Step 4 ?Perform the math
Step 1
Step 2
500 ml x 0.02 mg
1
1 ml
Step 4 = 500 x 0.02 mg
1 x 1
= 100 mg
Step 3
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Nsg 231 Calculating IV Solution Concentration
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