METHODS Forty rabbits were divided into 5 groups averagely and at random: A: model group, B: artificial pneumothorax group, C: intercostal artery pre ligated group, D: intercostal artery pre ligated with artificial pneumothorax group, E: control group.

• 方法 本地家兔 4 0只 ；随机均分为 5组 :A组-单纯致伤组 ；B组 -人工气胸组 ；C组 -肋间血管预结扎组 ；D组 -人工气胸组 +肋间血管预结扎组 ；E组 -正常对照组 .