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Microscopic findings from the rat left lung tissues stained with hematoxylin and eosin (magnification, ×200). The (A) sham (B) I/R (C) Dex2.5 (D) Dex5 (E) Dex+Yoh and (F) Yoh groups. (G) The severity of lung injury was scored and the data are presented as the mean ± standard deviation. **P<0.01 vs. the sham group and ##P<0.01 vs. the I/R group. Dex, dexmedetomidine; Dex 2.5, 2.5 μg/kg/h Dex; Dex 5, 5 μg/kg/h; Yoh, yohimbine; DexI/R, ischemia-reperfusion.
