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向鼠的气管内插入带袖套的气管插管,袖套压力300mmHg,1小时,即对气管粘膜产生损伤。然后用扫描及透射电镜观察其修复过程。结果发现,插管当时对气管粘膜的损伤最重。粘膜上皮缺损、水肿、充血、血管内皮细胞破坏。2日后炎症反应开始消退。修复过程3周可完成。在正常鼠的气管壁上,沿长轴走行的血管平均有117条。其中小动脉占3.4%、细动脉10.3%、毛细血管46.2%、细静脉31.6%、小静脉8.5%;插管后2日,气管壁的血管增加到平均281条,增到原来的2.4倍。各型
To the rat’s tracheal intubation with cuff intubation, cuff pressure 300mmHg, 1 hour, that is, tracheal mucosa damage. Then use scanning and transmission electron microscopy to observe the repair process. The results showed that intubation was the most tracheal damage. Mucosal epithelial defects, edema, congestion, vascular endothelial cell damage. 2 days after the inflammatory reaction began to subside. Repair process can be completed within 3 weeks. In the normal rat tracheal wall, there are an average of 117 blood vessels traveling along the long axis. The small arteries accounted for 3.4%, arterioles 10.3%, capillaries 46.2%, fine veins 31.6%, venules 8.5%; 2 days after intubation, tracheal wall blood vessels increased to an average of 281, an increase of 2.4 times. Various types