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Confusing Labelling Lead Doctors to Treat Emergencies With Wrong Adrenaline Dosages
Adrenaline, which is used to treat emergencies such as asthma attacks, is stored in salt water in glass ampoules, with the amount contained usually expressed as both a dose and a ratio on the label.
The ratio requires arithmetic to work out how much drug to administer. Therefore, doctors understand doses much better than ratios.
During the study, Dr Daniel Wheeler at the university found that having to do extra calculations to figure out how much adrenaline to give a person in an emergency might lead to the errors and delays, which are common in administering the drug.
It is well documented that patients are commonly given the wrong dosage of adrenaline, Dr Wheeler said.
To find out whether the labelling was indeed the cause of the high number of dosing errors, the research team set up mock scenarios.
They programmed a medical mannequin to look like it was having a life-threatening allergic reaction and doctors were then given ampoules of adrenaline and were told to treat the emergency.
One half of the doctors were randomly assigned to ampoules with labels that had the adrenaline dose while the other half were randomly assigned to ampoules with labels that had the amount of adrenaline expressed as a ratio.
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