However, mechanical ventilation could not only improve respiratory function, but have a direct impact on hemodynamics by changing the intrathoracicpressure and lung volume.
然而，机械通气不仅能够改善呼吸功能，而且通过胸腔内压力及肺容积的改变，直接影响患者血流动力学。
2
Results Paradoxical respiration occurred and the intrathoracicpressure 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；
3
Any form of positive-pressure ventilation is deleterious during cardiac arrest because the increase in intrathoracicpressure decreases venous return to the heart and perfusion of the heart and brain.