tryptase measurement if anaphylaxis
Last reviewed 01/2018
After a suspected anaphylactic reaction in adults or young people aged 16 years or older, take timed blood samples for mast cell tryptase testing as follows:
- a sample as soon as possible after emergency treatment has started
- a second sample ideally within 1-2 hours (but no later than 4 hours) from the onset of symptoms
After a suspected anaphylactic reaction in children younger than 16 years, consider taking blood samples for mast cell tryptase testing as follows if the cause is thought to be venom-related, drug-related or idiopathic:
- a sample as soon as possible after emergency treatment has started
- a second sample ideally within 1-2 hours (but no later than 4 hours) from the onset of symptoms.
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