目的研究体外负压通气对血流动力学的影响。
Objective To study the hemodynamic effects of negative pressure ventilation.
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。
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.
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: Negative pressure ventilation produced an increase in tidal volume and no influence on hemodynamic parameters.
目的：观察间歇负压通气时通气压力对实验犬的通气和血流动力学的影响。
Objective: To observe the effects of intermittent negative pressure ventilation on ventilation and hemodynamics in dogs.
而且通气罩与咽喉部解剖更匹配，密封性更好，可为正压通气提供更好的气道密封压。
And moreover, the ventilation mask has better sealing performance as it matches the throat better. So it can provide higher airway seal pressure for positive airway pressure ventilation.
因此，二氧化碳监测仪提供了一种连续的非侵袭性的反应动脉血二氧化碳分压的方法，二氧化碳分压直接由肺泡通气决定。
Hence capnometry offers a continuous, non-invasive way to reflect the partial pressure of carbon dioxide in arterial blood, which is directly determined by alveolar ventilation.
在这一过程中如果可以经鼓室隔膜通气的话，尽管峡部闭锁也不会产生上鼓室的负压。
In this process, if may pass through drum room mutual lack of understanding ventilation, although the canyon department block system will not have on the drum room negative pressure.
目的：探讨浅快呼吸指数（RVR）和气道闭合压对机械通气患者撤机的指导意义。
Objective:To evaluate the significance of rapidshallowbreathing index(RVR), and airway occlusion pressure as weaning predictors in mechanically ventilated patients.
目的观察不同气道压及气流量对连续气流通气(CFV)犬气体交换的影响。
Objective To evaluate the effects of different airway pressures and flow rates on gas exchange during constant flow ventilation (CFV) in dogs.
与总孔隙度和毛管孔隙度相比，通气孔隙度在反映土壤压实时更为敏感。
Aeration porosity is more sensitive than total and capillary porosity to reflect soil compaction degree.
卸压阀或通气阀使罐内油面上方的蒸汽保持微正压(油罐正在排空时除外)。
Relief valve or vent valves permit a small pressure to be maintained on the vapor over the oil in the tank (except when the tank is being emptied).
主要测试项目是通气道密封压。
常压酒瓶没有装机之前，通气帽是不打开的，便于酒厂装酒和运储。
Before the spirit bottle is placed on the machine, the air-hole cap is not opened, so that it is favorable for filling spirit, storage and transportation.
混合气体也能比普通气体更长时间的保持胎压。
The mixture also retains the pressure longer than normal air would.
该设备向有载分接头转换器连续地提供氮气，并具有通气孔，以保持略高于极端气候条件范围的超压。
The apparatus applies a continuous supply of nitrogen to the load tap changer, and has an orifice to maintain a slight overpressure over an extreme range of climatic conditions.
该设备向有载分接头转换器连续地提供氮气，并具有通气孔，以保持略高于极端气候条件范围的超压。
The apparatus applies a continuous supply of nitrogen to the load tap changer, and has an orifice to maintain a slight overpressure over an extreme range of climatic conditions.
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