Figure 2. The image of pathological grading. A1, B1 and C1 show the effect of pulsed flush, uniform flush and no intervention on loss of venous endothelial cells respectively (Cross-section, 100 μm means magnification, x200), A2, B2 and C2 show the effect of pulsed flush, uniform flush and no intervention on inflammatory cell infiltration in the perivascular tissue (Cross-section, 50 μm means magnification, x400), A3, B3 and C3 show the effect of pulsed flush, uniform flush and no intervention on epidermal degeneration respectively (Cross-section, 50 μm means magnification, x400), also A4, B4 and C4 show the effect of pulsed flush, uniform flush and no intervention on Chondrocyte degeneration in the vein attachment (Cross-section, 50 μm means magnification, x400).
