D-Dimers explained

The D-dimer test is a marker of blood clotting activity and is not diagnostic of VTE When used appropriately the D-dimer test helps “rule out” VTE if the test is negative and the chance of the patient having a VTE is relatively low

Sudden onset blue leg

You are managing a 56 year old woman with severe pneumonia in the Intensive Care Unit when you are called to see her because her leg has suddenly turned blue:

Emergency Medicine Kenya Foundation