to investigate the mechanism of the different influence ofthe intrathoracic pressure change (itpc) on the two ventricular fillings and the motion of interventricular septum.
建立模拟实验模型,观察胸压变化对左、右心充盈及室间隔运动的影响,从力学角度验证我们提出的呼吸影响心功能机制新假说;
aim to investigate the mechanism of the different influences of the intrathoracic pressure change (itpc) on the two venous return systems.
目的研究胸压变化对两侧静脉回流影响不同的力学原理。
any form of positive-pressure ventilation is deleterious during cardiac arrest because the increase in intrathoracic pressure decreases venous return to the heart and perfusion of the heart and brain.
因为正压通气会提高胸内压,减少静脉回流,进而减少心脑血液灌注。
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;
however, mechanical ventilation could not only improve respiratory function, but have a direct impact on hemodynamics by changing the intrathoracic pressure 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。