PETAL Insights · Early Screening
The D-dimer Diagnostic Pathway
click any node to explore
clinical presentation
Suspected Thrombosis
step 01
Physician Risk Assessment
low – intermediate risk
step 02
D-dimer Blood Test
one draw · results in 1–2 hrs
NORMAL
ELEVATED
outcome
Acute Thrombosis
Ruled Out
Investigation Stops
no imaging required
not a diagnosis
Signal: Further
Investigation Needed
step 03
Imaging: Ultrasound / CTPA
high risk → imaging direct
For health education only. Not a substitute for professional medical advice.
PETAL Insights · Shanghai Chest Hospital