Examine the pattern of the superficial veins on the posterior aspect of the leg. On the lower lateral aspect of the leg, again identify the small saphenous vein as it passes posterior to the lateral malleolus of the fibula. Observe that it is accompanied by the sural nerve [upper probe]. The small saphenous vein crosses the posterior aspect of the knee and pierces the fascia to join the popliteal vein.
Identify the perforating veins [lower probe] of both the great and small saphenous veins. The perforating veins convey blood between the superficial and deep veins of the lower extremity in this region.
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