In the figure shown below, two pressure support breaths in the same patient are depicted.
What has occurred between breath A and breath B?
A. The inspiratory time setting has lengthened.
B. The patient’s compliance has worsened.
C. The volume backup setting has increased.
D. The flow cycle percentage criteria have been increased. (理解流速切换百分比)
E. The mandatory breath rate has increased.
从图像看我们可以看到流速—时间、容量-时间、压力时间波形，压力是不变的，因此呼吸通气方式是压力控制通气；从A到B可以看到初始压力不变，初始峰流速未变，可以知道大气道阻力未变；送气的时间变短了，吸气呼气切换时间变小了，因此带来潮气量更低了，假如是控制通气的，那设置吸气时间减少；假如是PSV的，则峰值流速百分比（ESENS）增大，提前切换了。
D
原创文章（本站视频密码：66668888），作者：xujunzju，如若转载，请注明出处：https://zyicu.cn/?p=8746
微信扫一扫 
支付宝扫一扫 