A support leg assistant for use with a support jack having a telescoping support leg comprises an elongated housing member having a first end attached to the stationary outer tube of the jack and a second end extending outwardly from the jack. The segments can be circular, elliptical, lozenge shaped or shaped in other geometrical forms. In one embodiment, the flow conduit is a vein, such as a harvested saphenous vein, useful as an arterial graft, for example and without limitation, in a coronary artery bypass procedure. The system will break down the event into basic elements, so the user can ascertain the risk.