这个现象的原因是什么?
When all metabolically produced carbon dioxide is retained, the rate of rise of arterial Pco2 is of the order of 0.4 to 0.8 kPa.min21 (3–6 mmHg.min21 ). This is the result of the rate of production of carbon dioxide and the capacity of the body stores for carbon dioxide. During hypoventilation, the rate of increase in Pco2 will be less than this, and Figure 9.11 shows typical curves for Pco2 increase and decrease following step changes in ventilation of anaesthetized patients. The time course of rise of Pco2 after step reduction of ventilation is faster when the previous level of ventilation has been of short duration.
当所有代谢产生的CO2均未呼出,PaCO2的上升 速率约为0.4~0.8 kPa/min(3~6 mmHg/min),这是 CO2产生速率和身体储存CO2综合作用的结果。在低 通气时,PCO2的上升速率将小于此值,图9.11显示了 麻醉患者通气突然变化,PCO2增加和减少的典型曲 线。若之前短通气周期,与长通气周期(CO2较稳定状态)相比,突然降低通气后PCO2上升速度更快。
最后一句,理解的对吗?@ljzhang168 @西门开心 @李梦杰huxi @离床医学离床医学 @情Ca晚期 @急诊狼人
这段文字开始说了通气量为0的情况下PCO2上升速度,然后低通气以后,PCO2上升速度肯定会下降(给个图,说明一下)。最后是说,如果之前是短通气时间,在此基础上通气量突然降低,PCO2更容易发生潴留?对吗?
关键是最后一句,比来比去,这个现象的原因是什么?短通气周期还未达到CO2的平衡?
最后编辑于 2024-02-15 · 浏览 4025