Left Renal Vein to Inferior Vena Cava Pressure Relationship in Humans

Abstract
Pullback pressures form the left renal vein to the inferior vena cava were done on 50 normal patients. A gradient more than 1 mm Hg was found in only 1 patient. The significance of these results as they related to the etiology of varicocele formation and essential hematuria is discussed.