Conclusion The dynamic CT is ideally suited for the study of tracheal dimensions and shape during respiration maneuvers . Among the Chinese if the cross sectional area of trachea decrease by more than 50 % from inspiration to expiration diagnosis of tracheomalacia can be established .

结论动态CT是在 呼吸状态下研究 气管的形态和径线的理想工具，在中国人中，若呼气末时气管横断面面积较吸气末时减少50%以上时，可考虑有气管软化。

Methods Twelve patients with liver carcinoma were received tracheal cannula to control respiration during HIFU treatment . In order to decrease the influence of liver movement during HIFU treatment patients are controlled to stop respiration temporarily .

方法12例肝肿瘤患者在HIFU治疗过程中采用 气管或双支气管插管法控制 呼吸，根据HIFU治疗需要，通过暂时阻断呼吸，以消除肝脏运动对HIFU治疗的影响；

All children were operated under tracheal intubation general anesthesia and controlling respiration during the process .

所有患儿均行 气管插管全麻，全程控制 呼吸下进行手术。

The patients were given severe monitor with retaining tracheal cannula were assisted respiration with respirator .

MG患者术后给予重症监护并根据病情留置 气管插管，应用呼吸机进行人工辅助 呼吸。