The Vascular Laboratory.Its need in the programming of the treatment of the patient with venous disease.Following the Spinozian trend by admitting that: "what is, is". Wishing to follow the advice of Dr Volhard: "The gods put diagnosis before treatment" to achieve the best benefit in the health of our patients. Accept that the hemodynamics of the venous return of blood from the extremities to the heart is not simple but complex and that it is not enough to have pipes with healthy walls, adequate tone and healthy valves, but also a pump with the correct torque and that, to analyze the complex we must follow the Cartesian method of analyzing all its parts to reach the analysis of the whole, expressed through arithmetic; It is intended to present in this book, how to achieve the benefit of the diagnosis to achieve the therapy and its adequate follow-up with the instruments we have, with a highly trained staff and thus reach the need for the vascular laboratory in the treatment of the patient affected by venous diseases. The strength of a hospital is the strength of its staff".