Deep Vein Thrombosis (DVT) in the Emergency Department
A concise, evidence‑based approach in the ED improves diagnostic accuracy, reduces unnecessary imaging and anticoagulation, and speeds safe disposition.
This section summarises pathophysiology, bedside assessment, the diagnostic algorithm (Two‑level Wells → D‑dimer → imaging), immediate ED management, special populations, practical ED pathways and auditable quality measures.
Recommendations follow NICE NG158 and NICE quality standard QS201; operational points reference RCEM ambulatory‑care guidance.
Epidemiology and significance
- Incidence ≈ 100-200 per 100,000/year; lifetime risk ~2.5-5%.
- Up to 50% of patients with DVT develop long‑term consequences (post‑thrombotic syndrome, chronic venous changes, recurrent VTE).
- Most DVTs occur in the lower limb; upper‑limb DVTs are less common but important, frequently catheter‑related.
Pathophysiology and common sites
- Thrombosis commonly originates in areas of stasis and turbulence: soleal sinuses, valve pockets and venous confluences.
- Distal (calf) veins commonly involved: anterior tibial, posterior tibial, peroneal veins. Clots may propagate proximally to the popliteal, femoral and iliac veins - proximal DVTs carry a greater risk of pulmonary embolism.
- Virchow’s triad: venous stasis, hypercoagulability, endothelial injury.