Dr. Somali Nguyen provides a practical guide to performing a focused ultrasound exam for suspected deep vein thrombosis (DVT) using a linear probe. He outlines the key anatomical areas to assess: the transition from the iliac to the common femoral vein, the bifurcation of the femoral vein into the greater saphenous vein, and the popliteal vein behind the knee. Emphasizing proper patient positioning and probe orientation, He demonstrates how to use compression to distinguish veins from arteries and identify potential clots. The lecture offers a clear, step-by-step approach tailored for emergency department evaluations.