Figure 4.

Change of vascular endothelial growth factor (VEGF) in wound fluid in response to non‐contact low‐frequency ultrasound (NCLF‐US) therapy. Wound fluids were collected during the study visits. VEGF were quantified using Luminex 100 multiplex assays. Actual VEGF reading values were log‐transformed prior to analysis because of skewed distribution. Results were also expressed as percent change compared with baseline (week1) levels of these molecular markers (A). Correlation analysis on VEGF and MMP was also performed (B).