<prompt> Exsanguination is one of the first steps before application of a tourniquet preoperatively. All the following are contra indications for exsanguination exceptDeep vein thrombosisUnderlying fracturePresence of infectionTumour  <response>: Presence of underlying infection or tumor is an absolute contra indication for exsanguination since that can cause dissemination. Fatal pulmonary embolism may result if exsanguination is done over underlying deep vein thrombosis 