这里怎么又是PSV 又是NAVA通气模式？

NAVA “preview” 

A grey curve (Fig. 4) displayed on the monitor during PSV shows a “preview” of the estimated Paw that would exist if the patient was ventilated in NAVA mode with current proportionality setting. The shape of the Paw curve resembles the EAdi profile (i.e., proportionality), while the amount of assist depends on the EAdi amplitude and the selected NAVA level.

NAVA“预览”

PSV过程中，监视器上的灰色曲线（图4）显示了在NAVA通气模式和当前比例设置下患者估计的气道压（Paw）曲线的“预览”。气道压曲线的形状与EAdi轮廓（即成比例的支持）相似，而辅助的强度取决于EAdi振幅和所选NAVA水平。

这里怎么又是PSV 又是NAVA通气模式？

Fig. 4 Example of the neurally adjusted ventilatory assist (NAVA) preview during pressure support ventilation (inspiratory assist of 10 cmH2O above a positive end-expiratory pressure of 8 cmH2O).The grey curve shows a “preview” of the estimated airway pressure (Paw) that would exist if the patient was ventilated in NAVA mode. The shape of this Paw curve resembles the diaphragm electrical activity (EAdi) curve (i.e., proportionality). The amount of assist depends on the EAdi amplitude and the selected NAVA level (0.8 cmH2O/µV for this example)

图4 压力支持通气期间的神经调节通气辅助（NAVA）预览示例（吸气辅助10 cmH2O，呼气末正压8 cmH2O以上）。灰色曲线显示了如果患者以NAVA模式通气时估计的气道压力（Paw）的“预览”。此Paw曲线的形状类似于膈肌电活动（EADI）曲线（即成比例）。辅助量取决于EADI幅度和选定的NAVA电平（本例为0.8 cmH2O/µV）