在鉴别急、慢性肾衰竭时 ,常根据病史、临床特点判断 ,缺乏实验室的诊断依据。血、尿肌酐只能反映患者当时的肾功能 ,而头发在形成过程中逐渐沉积了血液中的肌酐物质 ,成为它的组成成分。为评价头发肌酐测定对鉴别急、慢性肾衰竭的价值 ,笔者采用碱性苦味酸法对急、慢性肾衰竭 In the identification of acute and chronic renal failure, often based on history, clinical features to judge, the lack of laboratory diagnosis. Blood, urine creatinine can only reflect the patient’s renal function at the time, and hair gradually deposited during the formation of creatinine in the blood, as its components. In order to evaluate the value of hair creatinine determination in the differential diagnosis of acute and chronic renal failure, the author adopted alkaline picric acid method for acute and chronic renal failure