Venous stasis, or venostasis, is a condition of slow blood flow in the veins, usually of the legs. A patient with venous stasis might be more vulnerable to the formation of blood clot, especially in the deep veins of the legs, called deep vein thrombosis (DVT).[1]
Causes include long periods of immobility such as when driving for long distances.[2][3] It has been called the coach-class syndrome because of prevalence in long distance travel in cramped space. It also occurs in prolonged bed rest with an illness or after surgery.[1]