Abstract This study was designed to further elaborate on the indicator-dilution method of measuring total blood flow in the limb. It was determined that the best method for measuring true femoral artery flow was with the electromagnetic flowmeter. Femoral vein flow was measured through a T tube adjusted to compensate for normal venous pressures. The dye indicatordilution method utilizing Evans blue dye was chosen as a means of measuring total flow in the limb. Femoral vein flow was consistently greater than femoral artery flow and total limb flow was significantly greater than either one. This was interpreted as showing that measurement with indicator-dilution technic is a better method of assessment of true flow in the leg and that collateral flow makes up a significant portion of blood flow to the leg. It was also found that the methods described herein are useful in evaluation of patients with vascular occlusive disease, especially when they are being considered for vascular surgery.