Question

A 73-year-old with intermediate pretest probability for PE has D-dimer 720 ng/mL FEU; age-adjusted threshold is used. What is the correct interpretation?

Accepted Answer

Negative; no imaging for PE is needed

Answer

Positive; proceed directly to anticoagulation without imaging

Answer

Indeterminate; repeat D-dimer in 24 hours

Answer

False positive due to age; order CTPA anyway

Answer

Perform V/Q scan only if creatinine is elevated

Practice question

A 73-year-old with intermediate pretest probability for PE has D-dimer 720 ng/mL FEU; age-adjusted threshold is used. What is the correct interpretation?