[Clinical symptoms and phlebographic findings in acute leg thrombosis].

275 cases of venous thrombosis were compared, and a conspicuous difference between clinical and phlebographic findings was discovered. The size alone of the thrombus has no relation to the symptoms it produces. 7 factors are presented to explain this lack of correlation: 1) Thrombosis in the rigid crural fascia causes more marked clinical symptoms than in other locations. 2) The larger the venous area to which the thrombus attaches itself, the more serious the symptoms. 3) In cases of deep venous thrombosis, if the superficial veins have dilated to aid collateral flow, venous congestion, an early indication of thrombosis, will be absent. 4) Ambulant patients have more pronounced symptoms than bed patients. 5) The faster a thrombus grows, the more marked are the symptoms of thrombosis. 6) Thrombosis can often be 1st diagnosed when the thrombus blocks the blood flow between the deep and the superficial veins. 7) Severe symptoms can arise if an earlier a symptomatic thrombus suddenly blocks the femoral canal.