Saphena

Saphena is a term used in anatomy, originating from the Latin word for the superficial veins of the leg. In practice, it most commonly appears in the names of the two major superficial leg veins: the great saphenous vein (vena saphena magna) and the small saphenous vein (vena saphena parva). These vessels form part of the superficial venous system and are important both clinically and surgically.

The great saphenous vein originates from the medial end of the dorsal venous arch of the foot. It ascends along the medial aspect of the leg and thigh, eventually draining into the femoral vein in the femoral triangle. It is the longest vein in the body and is widely used as a conduit in vascular procedures, notably in coronary artery bypass grafting, when autologous vein grafts are required. Its superficial course makes it susceptible to varicose changes and venous insufficiency.

The small saphenous vein originates from the lateral side of the dorsal venous arch of the foot. It runs up the posterior aspect of the leg and typically drains into the popliteal vein in the popliteal fossa, at the saphenopopliteal junction, though variations exist and some drainage patterns connect with the femoral system. Like the great saphenous vein, it contains valves that can fail in venous disease and contribute to varicosities.

Clinical relevance includes assessment of venous insufficiency, treatment of varicose veins, and, when suitable, harvesting for bypass surgery. Variations in anatomy are common, and detailed imaging guides surgical planning.