A 58-year-old with suspected PE has intermediate pretest probability (Wells 4.5). He is 72 years old with a D-dimer of 670 ng/mL (FEU). How should D-d...

Question

A 58-year-old with suspected PE has intermediate pretest probability (Wells 4.5). He is 72 years old with a D-dimer of 670 ng/mL (FEU). How should D-dimer be interpreted using age-adjusted cutoffs?

Accepted Answer

Negative because age-adjusted cutoff is age ×10 in FEU (here 720 ng/mL)

Answer

Positive because any value >500 ng/mL is positive

Answer

Negative because age-adjusted cutoff is age ×5 in FEU

Answer

Positive because age-adjusted D-dimer is not recommended

Answer

Indeterminate; proceed directly to CTPA

us-abem MCQ (SBA): Pulmonary Embolism-Age-Adjusted D-dimer

A 58-year-old with suspected PE has intermediate pretest probability (Wells 4.5). He is 72 years old with a D-dimer of 670 ng/mL (FEU). How should D-dimer be interpreted using age-adjusted cutoffs?