Unlike human skin it has no immune factors. It's a sterile material that poses no real threat of infection. It does have all the growth factors needed for healing. Eventually it's replaced with the patient's own skin. The procedure takes about 10 minutes and patients generally notice a dramatic change in the wound within a month.
Venous ulcers are a chronic wound caused by poor functioning of the valves in the veins of the legs.
The procedure is approved under Medicare and most private insurance companies.