pain relief red light pdt therapy physiotherapy machines for wound healing

1-Application of red light in the medical field: Red light is a light in the natural visible spectrum, whose wavelength range is 620~750nm. The light sensation of retina to this visible light is red, so it called red light. Red light has photochemical effect as well as thermal effect with strong penetration to human tissue. The penetration depth can up to 30mm that other wavelenghs of lights do not have, which have more obvious and direct biological effect. 2-Biochemical action of red light: (1) Efficient enzymatic reaction (2) Cellular aerobic respiration (3) Promote the growth of fibrocyte and endothelial cell (4) Enhance immune function (5) Improve Blood Circulation (6) Relieve pain (7) Wound healing, cells of repairing