Question

A 66-year-old with suspected PE (low clinical probability by Wells) is age 70 with D-dimer reported in FEU. What threshold supports ruling out PE using age-adjusted D-dimer?

Accepted Answer

Use age×10 ng/mL FEU (i.e., 700 ng/mL)

Answer

Use fixed 500 ng/mL FEU

Answer

Use age×5 ng/mL FEU

Answer

No D-dimer adjustment by age

Answer

Use age×10 μg/mL FEU (i.e., 7,000 ng/mL)

Practice question

A 66-year-old with suspected PE (low clinical probability by Wells) is age 70 with D-dimer reported in FEU. What threshold supports ruling out PE using age-adjusted D-dimer?