Calculations

Question 1

How many micrograms in a milligram?

Answer 1

1000

Question 2

What does 1:1000 adrenaline mean?

Answer 2

means that in a 1000ml solution there is 1g of adrenaline

Question 3

When a solution says it is 0.3% what is a good way to think of that meaning?

Answer 3

In 100 ml there is 0.3 of a gram or 300mg

Question 4

If something says 10ml vials with 200mg/ml it means?

Answer 4

each ml contains 200mg
so the vial actually contains 2000mg

this is different from saying it comes in 200mg/ 10ml vials!

Question 5

If a bag of fluid is labelled sodium chloride 0.9%/ potassium chloride 0.15% (20mmol/L) but you give 500ml how many mmol potassium?

Answer 5

10mmol

it is 20 mmol/L ie. per litre, so if only giving 500ml you have to half it, watch out for the /L meaning per litre

Question 6

How many nanogram in a microgram?

Answer 6

1000 nanograms = 1 micrograms

so order of units goes nanogram - microgram - milligram - gram - kilograms !