EMERGENCY DEPARTMENT

D-DIMER changes!
Age adjusted D-DIMER is now in use within CDDFT.
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Age-adjusted D-DIMER

From 18th October, 2021, age-adjusted D-DIMER will be in use within CDDFT.

In order to use age-adjusted D-dimer, the assay itself is changing, as are the normal values. It is pretty simple and is as below:

Old assay: New assay:

Therefore, for age 51, the normal cut off is 510. For age 85, it is 850 – and so on.

The lab will be applying the age-adjustment in their reporting – so the normal value reported will be age adjusted, and the result will only appear in red as abnormal if above the age adjusted value.

Commonly used resources

CT Head AlgorithmParacetamol / NACElectrolyte CorrectionRenal colicChest Pain AlgorithmDKAVFC DocumentsSepsis Tool

Cardiac Arrest Algorithms

AdultPaediatricNeonatalTraumatic
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