Age-adjusted D-dimer
D-dimer cutoff of age × 10 for patients older than 50.
Inputs
0 of 1years
Optional, to compare.
Patient values are shared with every calculator.
When to use
- Non-high pretest probability of PE or DVT.
Pearls and pitfalls
- Only for assays reported in FEU with a 500 ng/mL cutoff; halve for DDU assays.
Why use
Fewer false positives in older adults.
Cutoff (ng/mL FEU) = age × 10 for age > 50; otherwise 500