A 63-year-old woman with suspected PE and low pretest probability has age-adjusted D‑dimer applied. Assay is DDU. She is 70 years old. What cutoff app...

Question

A 63-year-old woman with suspected PE and low pretest probability has age-adjusted D‑dimer applied. Assay is DDU. She is 70 years old. What cutoff applies?

Accepted Answer

Age ×5 (350 ng/mL DDU)

Answer

Age ×10 (700 ng/mL DDU)

Answer

Fixed 500 ng/mL DDU

Answer

Age ×10 (700 ng/mL FEU only)

Answer

No age adjustment in DDU

PE-D‑dimer Units — MRCEM SBA MCQ

A 63-year-old woman with suspected PE and low pretest probability has age-adjusted D‑dimer applied. Assay is DDU. She is 70 years old. What cutoff applies?