POCUS DVT is Easier than You Think!
Nov 30, 2023
This is why you should learn how to perform ultrasound of the lower extremity for DVT.
The 2008 prospective study, "Lower‐Extremity Doppler for Deep Venous Thrombosis - Can Emergency Physicians Be Accurate and Fast?" (1), evaluated the precision and speed at which emergency physicians could utilize ultrasound to detect DVT. The study, encompassing 112 patients, identified 34 with positive DVT results. Examinations were cross-referenced with ultrasound findings from the radiology department. Emergency physicians demonstrated a high correlation, identifying 111 out of 112 patients compared to ultrasound examinations from the radiology department, with no proximal DVT overlooked. The average time for a complete ultrasound examination was 3 minutes.
In another study, "Emergency Physician Performed Ultrasound for DVT Evaluation" (2), ultrasound assessments for all lower extremity DVTs exhibited a sensitivity and specificity of 89%, while proximal lower extremity DVTs showed a sensitivity of 95% and specificity of 96%. It's crucial to recognize that ultrasound has its limitations, particularly in diagnosing DVT in calf veins, as this area poses technical challenges for evaluation. Sensitivity drops for DVT in calf veins to as low as 73% in symptomatic patients and 50% in asymptomatic patients.
These studies underscore that ultrasound is a valuable tool for promptly diagnosing and implementing interventions, whether in a hospital or clinic setting. Additionally, it contributes to reducing waiting times in hospitals.
References
- Blaivas M, Lambert MJ, Harwood RA, Wood JP, Konicki J. Lower-extremity Doppler for deep venous thrombosis--can emergency physicians be accurate and fast? Acad Emerg Med. 2000;7(2):120-6.
- Fox JC, Bertoglio KC. Emergency Physician Performed Ultrasound for DVT Evaluation. Thrombosis. 2011;2011:938709.
