[The role of unesterified fatty acids in diagnostic of fat embolism.] 
The prospective study of concentration of unesterified fatty acids in patients with severe combined trauma was carried out.  In patients with fatty embolism syndrome increasing of concentration of unesterified fatty acids in arterial and venous blood in comparison with reference interval was detected.  The increasing of concentration of fatty acids in arterial blood in comparison with venous blood was established.  The higher diagnostic significance of arterial venous difference in concentration of unesterified fatty acids in diagnostic of fatty embolism syndrome is established.