Russell I F, Chambers W A
Br J Anaesth. 1981 Oct;53(10):1043-7. doi: 10.1093/bja/53.10.1043.
Closing volume and other principal lung volumes were measured during and after pregnancy in 10 healthy non-smoking women aged 18--25 yr. There were no significant changes on closing volume or closing capacity. A decrease in functional residual capacity as pregnancy progressed resulted in airway closure during tidal breathing in more than 50% of subjects at term when in a supine position, but this did not occur when they were seated.
对10名年龄在18至25岁的健康非吸烟女性在孕期及产后测量了闭合气量和其他主要肺容积。闭合气量或闭合容量没有显著变化。随着孕期进展，功能残气量减少，导致足月时超过50%的受试者仰卧位时在潮气呼吸期间气道闭合，但坐位时未出现这种情况。
