Vascular Module Step 9, Part 2 Vascular Ultrasound DVT 1. Which of the following is true about venous thrombosis?* A. The use of ultrasound has decreased the incidence of subsequent thrombosis B. Ultrasounds help identify cases of pre-existing thrombosis C. Ultrasounds help identify cases of pre-existing thrombosis D. Both B and C 2. Gold standard to confirm venous patency is:* Ability of vein to vary with size due to respiration Ability of vein to collapse with probe pressure (walls coming together) Fact that no thrombotic material can be seen in vessel Ability of vein to expand when performing Valsalva maneuver 3. In a patient with a high clinical suspicion for DVT, a negative scan on your exam should:* Greatly reduces likelihood and full duplex does not need to be ordered even if the suspicion is high Strongly suggest that be confirmed with a full duplex study performed by an expert Should be repeated twice a day for 72 hours Should be repeated daily for 48 hours 4. A focused compression ultrasound technique involves compression of which veins?* Common femoral and deep femoral Iliac and popliteal Common femoral down to its bifurcation and then popliteal Superficial femoral and popliteal 5. What structure is commonly confused with venous thrombosis?* Femoral nerve Lymphatic channel Inguinal hernia Lymph node Reading: UF Local Material Diagnosis of Deep Venous Thrombosis by Critical Care Physicians Using Compression Ultrasonography Accuracy of Ultrasonography Performed by Critical Care Physicians for the Diagnosis of DVT