Objective To investigate the expression of tissue factor and explore its clinical significances in pulmonary artery after acute pulmonary thromboembolism.Methods Thirty-four Japanese white rabbits(LevelⅡanimals)were randomly(random number)assigned into four groups:group A(specimen of pulmonary artery was taken 3 hours after Objective To investigate the expression of tissue factor and explore its clinical significances in pulmonary artery after acute pulmonary thromboembolism. Methods Thirty-four Japanese white rabbits (Level II animals) were randomly (random number) assigned into four groups: group A (specimen of pulmonary artery was taken 3 hours after