Abstract: ObjectiveTo define the occurrence rate,time course, potential etiologic factors, treatment and prognosis of hyponatremia in patients with actue spinal cord injury.Methods99 patients who were admitted with hyponatremia after acute spinal cord injury were analysed retrospectively. ResultsAll these patients could concluded into three types:type I were mostly the patients with thoracic and lumbar spinal cord injury,whose mean lowest serum natrium concentration (MLSNC) were (128.6±6.6)mmol/L,continued (8±5.3)days,and it could be recovered after two weeks by accurate supply natrium and/or fluid restriction.Type II included the patients with cervical spinal cord injury,whose MLSNC were(125.1±6.0)mmol/L, continued(26.7±17.0)days,mean uric natrium concentration were 200mmol/24h,and poorly responded to the therapy of supply natrium.Type III also included the patients with cervical spinal cord injury, whose MLSNC were (118.3±9.4)mmol/L, continued (36.8±5.4)days, uric natrium concentration were 200-400mmol/24h, urinary volume had been above to 4000ml for 4 weeks.The serum natrium concentration would decrease after supply natrium therapy,but would recover.after fluid restriction. ConclusionsThe hyponatremia in patients with actue spinal cord injury sould be treated according to different type.

Key words: spinal cord injury, hyponatremia