Acute ischemia is the reduction or abolition of blood supply in an area or organ. The causes may be varied: external to the vessel, compression, tumors, scars, etc; or internal, such as thickening of the vessel wall by chronic inflammation, tumor thrombus ... In any case, the three major causes of this clinical picture thrombosis, strokes and injuries. Clinically manifested by a sudden and intense pain that does not respond to normal painkillers. It occurs more frequently in the lower extremities, but can affect any area of the body. Ultimately, the lack of blood nutrition can trigger gangrene of ischemic tissue.