Holdcroft A, Bevan D R, O'Sullivan J C, Sykes M K
Anaesthesia. 1977 Jun;32(6):517-23. doi: 10.1111/j.1365-2044.1977.tb09998.x.
During pregnancy there is a fall in functional residual capacity and expiratory reserve volume. The point of airway closure in relation to vital capacity and the expiratory reserve volume was determined in 11 post-partum patients who had previously been studied during pregnancy. The lung volume at which airway closure occurred in pregnancy and the post-partum period did not change in relation to the vital capacity whereas the expiratory reserve volume did, so that airway closure became imminent in the pregnant women during tidal ventilation, especially whilst in the suping position. The significance of this alteration in pulmonary function to obstetric anaesthesia is discussed.
孕期功能残气量和呼气储备量会下降。对11名产后患者进行了气道闭合点与肺活量和呼气储备量关系的测定，这些患者此前在孕期已接受过研究。孕期和产后气道闭合时的肺容积相对于肺活量没有变化，而呼气储备量有变化，因此孕妇在潮气量通气时，尤其是仰卧位时，气道闭合即将发生。文中讨论了这种肺功能改变对产科麻醉的意义。
