A patient in septic shock with acute respiratory failure who is receiving mechanical ventilation in pressure control mode has a pulmonary artery catheter in place to assist in management of fluids and pressor therapy. Convention regarding the recording of pulmonary arterial pressure is that measurements be taken at which of the following times?
A. At peak of inhalation and just before the QRS
B. At end of exhalation and during the QRS
C. At peak of inhalation and just after the QRS
D. At end of exhalation and just after the QRS
答案解析：
对于通气和非通气患者，在呼吸周期呼气相结束时胸部休息时测量血流动力学参数。心动周期中采集中心静脉压和肺动脉闭塞压(PAOP)读数的点为舒张末期，与C波发生的点一致。C波常不可见；但在PAOP的情况下，C波的时序与QRS的末端相吻合。
正确答案：D
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