Recirculation circuit

W. Hach 1994

Term in phlebology, with which W. Hach described a hypothetical concept in the pathophysiology of a varicosis. The recirculation circuit is a pathological venous circuit of the lower extremity in which a kind of private circulation (Trendelenburg) develops due to a varicose truncal vein, conjunctival side branch varicosis and perforating veins.

The blood flows retrogradely into the saphenous vein at a proximal point of insufficiency of a confluence extrafascial vein (e.g. confluence of the saphenous vein with the paravian saphenous vein - cross insufficiency) due to the prevailing pressure conditions.

At the distal point of the saphenous vein insufficiency, a varicose lateral branch vein, which has developed over time, opens up, allowing the blood to flow distally to the inflow area. Venae perforantes.

These lead the blood into the deep venous system (e.g. into the femoral vein), where it enters the recirculation circuit in the groin region via the insufficiency vein.

1. Hach W et al (1994) The recirculation circuits of primary varicosis. Springer Publishing House Heidelberg
2. Wagner A (2010) Physiology and pathophysiology of venous hemodynamics. In: T Noppeney, H Nüllen Diagnosis and Therapy of Varicosis. Springer Medicine Publishing House Heidelberg S 52 -60