Question

A 55-year-old with dyspnea and unilateral leg swelling is low-intermediate risk for PE. D-dimer is 380 ng/mL; age-adjusted cutoff is applied. Which interpretation is correct?

Accepted Answer

Negative if <age×10 ng/mL (years) for patients ≥50

Answer

Positive; proceed to CTPA

Answer

Negative if <500 ng/mL regardless of age

Answer

D-dimer is not useful in PE

Answer

Order V/Q scan regardless

Practice question

A 55-year-old with dyspnea and unilateral leg swelling is low-intermediate risk for PE. D-dimer is 380 ng/mL; age-adjusted cutoff is applied. Which interpretation is correct?