ABSTRACT
[Objective]To investigate the relationship between neurogenic pulmonary edema(NPE)and the changes of substance P in serum and bronchoatveolar lavage fluid(BALF)in acute spinal cord injured rats during isoflurane inhalation.[Method]Thirty male SD rats with body weight of 300-330g were randomly divided into 3 groups:1.5% isoflurane group,chloral hydrate group and sham operation group,ten in each group.Epidural balloon compression of the T8 spinal cord was performed.Alt animals were sacrificed 10 min after being compressed.The content of substance P and protein concentration in serum and BALF were measured.Then the lung permeability index(LPI)was calculated.[Result]The content of substance P in serum and BALF in 1.5% isofiurane group was higher than that in chloral hydrate group(P0.05).[Conclusion]1.5% isofturane can stimulate the release of substance P to take part in the development of neurogenic pulmonary edema in rats.