in contrast to thrombotic occlusions proximal to the knee and multi-level thromboses , which could be identified by a significantly ( p less than 0.001 ) reduced venous volume and maximum venous outflow ( measurement at the calf level ) , isolated calf vein thromboses could not be detected even by sensing from the foot level or only if all three deep veins of the calf were occluded .
C0040053
thromboses
C0042487
vein