Medically reviewed by Lauren Schlanger, MD Key Takeaways A blood clot in your arm is often associated with a health condition like cancer or the use of an inserted device like a catheter or pacemaker, ...

A D-dimer test measures how much D-dimer protein is in the blood. This protein is present when blood clots break down. A typical range is 0-0.50 milligrams per liter (mg/L) of blood. D-dimer is a ...