Question

An ED patient aged 77 with suspected PE has low-intermediate pretest probability. Which D-dimer threshold is acceptable to exclude PE?

Accepted Answer

Age × 10 ng/mL (FEU) if ≥50 years

Answer

Fixed 500 ng/mL FEU for all ages

Answer

Age × 5 ng/mL (FEU) if ≥65 years

Answer

Age × 10 µg/L (DDU) if ≥50 years

Answer

1,000 ng/mL FEU for all ≥70 years

Practice question

An ED patient aged 77 with suspected PE has low-intermediate pretest probability. Which D-dimer threshold is acceptable to exclude PE?