 Hoffmannscientifi work is focussed on ischemia Reperfusion Injury, Sepsis, Transplantation, vascular access surgery, bypass surgery, microperfusion in arteriosclerosis and diabetes.The focal areas of Hoffmann's scientific work as vascular surgeon are the endo-vascular aortic surgery and complex revision procedures.As an expert he is operating for the arbitration body of the medical association of Nordrhein, the arbitration body of the state chamber of medicine in Munich as well as for different courts.