ABSTRACT
To observe the protective effect of lidocaine on acute lung injury(ALI) following intestinal ischemia/reperfusion(I/R). Adult SD rats were randomly divided into 4 groups ( n =8): control group, with super mesenteric artery isolation only; I/R group, intestinal I/R (60/180min); two lidocaine treated groups, in which lidocaine in a dose of 2mg/kg was administered intravenously immediately or 60min after reperfusion, respectively. Intestinal I/R resulted in deterioration of MAP, increased the lung permeability index, serum TNF ?level and lung TNF ?mRNA expression ,and produced histopathological changes in the lung. Lidocaine given immediately after reperfusion could attenuate these changes, while lidocaine 60min group showed no effects on the changes in MAP, serum TNF ? and pathological changes in the lung. These data suggested that lidocaine could attenuate lung injury following intestinal I/R,in part by inhibiting the sequestration of neutrophils and the production of TNF ?. Lidocaine given early after reperfusion seemed to be more effective .