Results: Negative pressure ventilation produced an increase in tidal volume and no influence on hemodynamic parameters.
结果：间歇负压通气能够增加实验犬潮气量，但对血流动力学无影响。
Results Paradoxical respiration occurred and the intrathoracic pressure kept negative but with no bulge of malactic tissues after the fulfilment of the floating thoracic wall models.
结果浮动胸壁模型完成后，均出现反常呼吸，胸腔内压力为负值，未出现软化部分膨出；
Closed system, negative pressure operation, no dust emissions, a good operating environment.
系统全封闭，微负压操作，无粉尘飞扬，操作环境好。
Closed system, negative pressure operation, no dust emissions, a good operating environment.
系统全封闭，微负压操作，无粉尘飞扬，操作环境好。
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