A 45-year-old with new-onset severe unilateral leg swelling has low-intermediate pretest probability for PE and age 45. What D-dimer threshold is used...

Question

A 45-year-old with new-onset severe unilateral leg swelling has low-intermediate pretest probability for PE and age 45. What D-dimer threshold is used for age-adjusted strategy?

Accepted Answer

Age x 10 ng/mL (fibrinogen equivalent units)

Answer

500 ng/mL for all ages

Answer

Age x 5 ng/mL

Answer

Age x 20 ng/mL

Answer

No D-dimer needed in low-intermediate risk

Pulmonary Embolism Evaluation — MRCEM SBA MCQ

A 45-year-old with new-onset severe unilateral leg swelling has low-intermediate pretest probability for PE and age 45. What D-dimer threshold is used for age-adjusted strategy?