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 thrombosisB. Ultrasounds help identify cases of pre-existing thrombosisC. Ultrasounds help identify cases of pre-existing thrombosisD. Both B and C2. Gold standard to confirm venous patency is:*Ability of vein to collapse with probe pressure (walls coming together)Ability of vein to expand when performing Valsalva maneuverFact that no thrombotic material can be seen in vesselAbility of vein to vary with size due to respiration3. In a patient with a high clinical suspicion for DVT, a negative scan on your exam should:*Should be repeated daily for 48 hoursShould be repeated twice a day for 72 hoursGreatly reduces likelihood and full duplex does not need to be ordered even if the suspicion is highStrongly suggest that be confirmed with a full duplex study performed by an expert4. A focused compression ultrasound technique involves compression of which veins?*Common femoral and deep femoralSuperficial femoral and poplitealIliac and poplitealCommon femoral down to its bifurcation and then popliteal5. What structure is commonly confused with venous thrombosis?*Lymphatic channelInguinal herniaLymph nodeFemoral nerve 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