The contents of malondialdehyde (MDA), thromboxane (TxB 2) in blood and lung tissue were determined; histological change in lung tissue was observed by optical microscope (OM) and electronic microscope (EM).

• 分别检测各组血及肺组织中丙二醛 (MDA) ,血栓素B2 (TxB2 )含量 ,并通过光学显微镜和电子显微镜观察组织学改变和PMN计数。