Phlebography, has been compared with the results of venous capacity measurement taken from 150 patients, 76 women and 74 men. The measurement of the venous capacity is a appropriate screening method to determine any irregularities of the deep venous hemodynamic. It is possible to attain a more exact indication for the phlebography. Maximum expression of the values of venous capacity, is however, contained in the functional periodical controls of the pathologic processes of the deep venous system.