W. Melville Arnott, T.D., M.D., F.R.C.P., F.R.C.P.(Edin.), F.R.C.P.(C), F.C.
This content is PDF only. Please click on the PDF icon to access.
Adequate pulmonary ventilation requires that each alveolus should receive at each inspiration sufficient air to maintain an oxygen tension above, and a carbon dioxide tension below, that of pulmonary capillary blood. Evidence was presented that the design of the air passages in respect to dimensions, ratios of diameters of parent to daughter branches, and angles of branching approximate closely the theoretical optimum for mass movement of gas down to the level of terminal bronchioles (0.6 mm in diameter). Distal to this point the geometry of the passages supports the hypothesis that gas movement is by molecular diffusion.
The single-breath nitrogen
Learn more about subscription options.
Register Now for a free account.
Arnott WM. The Lilly Lecture: Alveolar Ventilation.. Ann Intern Med. 1968;68:1139. doi: 10.7326/0003-4819-68-5-1139_1
Download citation file:
Published: Ann Intern Med. 1968;68(5):1139.
Results provided by:
Copyright © 2017 American College of Physicians. All Rights Reserved.
Print ISSN: 0003-4819 | Online ISSN: 1539-3704
Conditions of Use
This PDF is available to Subscribers Only