Question

A 68-year-old with low-intermediate risk for PE has D-dimer 610 ng/mL (FEU). Age-adjusted threshold is considered. Which interpretation is correct?

Accepted Answer

Negative because threshold is 680 ng/mL (age ×10)

Answer

Positive because threshold is 500 ng/mL

Answer

Indeterminate; repeat in 24 hours

Answer

Requires V/Q scan regardless

Answer

Negative only if threshold 6800 ng/mL (age ×100)

Practice question

A 68-year-old with low-intermediate risk for PE has D-dimer 610 ng/mL (FEU). Age-adjusted threshold is considered. Which interpretation is correct?