Primary venous insufficiency of deep venous valve of lower extremity

Primary deep venous insufficiency is a new category of venous disease first proposed by Kistner (1980), mainly due to the elongation, relaxation, and sagging of the free edge of the valve in the deep vein, which acts on gravity When the inferior blood is refluxed, the two opposing leaflets cannot be closely matched in the middle of the lumen, which causes deep vein reflux disease, causes congestion and high blood pressure in the lower limb vein system, and causes a series of clinical symptoms and signs.

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