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Age-Adjusted D-dimer for Venous Thromboembolism (VTE)

PulmonologyEmergency medicineThromboembolismBeta toolThis tool is in beta. It has undergone internal validation but still requires additional testing. Always confirm the data entered and the results obtained before clinical use. It should not be used as the sole basis for clinical decisions.
Use completed whole years only; fractional age is out of scope.
years
Enter the quantitative value in the standard 500 µg/L-compatible formulation.
µg/L
Compatible quantitative assay with standard negative cutoff 500 µg/LChoose Yes only when the assay is quantitative/high-sensitivity and uses the published formulation.
Suspected PE with low/intermediate or nonhigh pretest probability in outpatient/ED settingChoose Yes only when the result is being used inside the validated suspected-PE pathway.

Clinical noticeEducational threshold support only. Use age-adjusted D-dimer only within an appropriate suspected-PE diagnostic pathway and not as a standalone declaration that VTE is absent.

Context and use

If age <= 50 years, threshold = 500 µg/L

If age > 50 years, threshold = age x 10 µg/L

The boolean output reports only whether the measured D-dimer is strictly below the calculated threshold; equality is not promoted into a clinical rule-out decision.

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