7.5 SDMS CMEs: 7.5 Vascular Technology Credits. To perform an adequate duplex ultrasound evaluation for venous insufficiency, an understanding of venous hemodynamics is critical. This presentation provides a solid overview of venous hemodynamics from the perspective of duplex evaluation. An anatomical review of the iliac veins, popliteal, and calf veins will be covered as well as how to perform the best duplex ultrasound of these areas. There will be an emphasis on the calf veins including the tibial, peroneal, gastrocnemius, and soleal veins as well as how to identify and evaluate them properly with ultrasound. The techniques, especially patient positioning is covered. We demonstrate several examples of small saphenous vein pathology and how it can impact venous system hemodynamics. We cover anatomical review of accessory saphenous veins and how to differentiate these vessels from tributaries. The differences between upper and lower extremity veins and venous disease will also be discussed. And finally, a review of the pathology of upper extremity venous thrombosis is covered.