I'm a childrens community nurse who is the lead for asthma.
One problem I'm facing is parents using empty mdi canisters and being unsure of when they are empty. Some parents have been told to 'drop their canisters in water', after researching this it appears this is very old fashioned advice.
Does anyone know any up to date research on this? I've been telling parents the only sure way to know is to count their doses as much as possible and if unsure always use a new one.
Be glad of any input.