Objective To study the effects of astragalus injection(AI) on inflammatory factor and oxygen free radicals of early stage pressure ulcer in rats.Methods Twenty-four rats were randomly divided into 3 groups : ischemia-reperfusion(I/R) group(n = 8) ,AI intervention group(n = 8) and control group(n = 8). Serum myeloperoxidase(MPO) , superoxide dismutase(SOD) levels were used to evaluate the effects of AI.Results Serum MPO level was markedly higher in model group than those in control group(P〈0.01), while the SOD level was signifi...