Negative pressure wound therapy is shown to improve tissue blood flow and tissue oxygen saturation. Application of negative pressure causes subtotal capillary occlusion, which acts as a stimulus for post occlusive reactive hyperaemia. This promotes wound bed granulation, contraction of wound margins and reduction of bacterial load. There are 3 modes of applying negative pressure: continuous, intermittent and cyclical. The aim of this article is to assess the role of cyclical negative pressure wound therapy in management of raw post traumatic wounds.