On-line activity

Table of Contents

1. Introduction
2. Calculating the number of tablets or volume of elixir
3. Calculating the volume for injections
4. Calculating IV Fluid Infusion Rates for Fluids with Gravity Feed Infusion Sets
5. Calculating drug infusion rates
6. Suggested reading

Calculating the volume for injections

Here is a simple way for calculating volume for injections:

or

Calculate the following:

What volume of drug should be drawn up?

1	Question 1 Pethidine 60 mg is ordered. Stock ampoules contain 100 mg in 2 ml. What volume of drug should be drawn up?

2	Question 2 Papaveretum 15 mg is ordered. Ampoules are available in 20 mg/ml. What volume of drug should be drawn up?

3	Question 3 An injection of morphine 8 mg. is ordered. An ampoule is available containing 10 mg/ml. What volume of drug should be drawn up?

4	Question 4 Pethidine 80 mg is to be given I.M. Stock ampoules contain 100 mg in 2 ml. What volume of drug should be drawn up?

5	Question 5 A patient is to receive an injection of gentamicin 60 mg. The ampoule contains 80 mg in 2ml. What volume of drug should be drawn up?

6	Question 6 How much morphine solution should be drawn up for a 7.5 mg dose if a stock ampoule contains 15 mg in 1ml?

7	Question 7 Heparin is available at a strength of 5000 units per 5ml. What volume is needed to give 800 units?

8	Question 8 A patient is to be given 40mg of hydrocortisone. Stock ampoules contain 50mg in 2ml. What volume of drug should be drawn up?

9	Question 9 60 mg of phenobarbitone is required. Available stock contains 125 mg in 5 ml. What volume of drug should be drawn up?

10	Question 10 A stock bottle of heparin contains 25,000 units in 1 ml. What volume of drug will be required to give 15,000 units?