Methods The pig experimental models of pulmonary embolism and infarction were examined by X ray, ventilationperfusion scanning, helical CT, angiography.
方法以小型猪为肺栓塞、肺梗死实验动物模型，进行X线平片、核素灌注扫描、螺旋CT、血管造影检查。
2
An altered level of consciousness indicates the need for immediate reevaluation of the patient's oxygenation, ventilation, and perfusion status.
意识水平的改变意味着要对患者的氧和作用，通气和灌注状况进行重新评估。
3
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.