FIELD: medicine and veterinary science. SUBSTANCE: method is based on comparison of variations of ammonia concentration in biologically active fluid and state of man's health. Method includes determination of periods of early aggravation of health state (slow increase of ammonia concentration in biologically active fluid after its sampling), considerable aggravation of health state (sharp increase of concentration) and sharp aggravation of health state (reduced concentration to zero). EFFECT: extended possibilities of determination in various diseases, higher accuracy of prognostication and simple execution of claimed method. 1 cl, 3 graphs
