title: Closing volume in normal pregnancy.
abstract: 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.
mesh_terms: D000293:Adolescent; D000328:Adult; D003011:Closing Volume; D005260:Female; D006801:Humans; D008176:Lung Volume Measurements; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D011187:Posture; D011247:Pregnancy
chemical_list: D010100:Oxygen