Abstract
Carbon monoxide diffusing capacity (D lco ) single breath method was determined at rest and at different grades of exercise. Membrane diffusing capacity (D m) and pulmonary capillary blood volume (V c) were computed. Blood volume increased as severity of exercise increased but Dm remained essentially unchanged. Exercise in the supine position failed to increase D m over the values observed in the erect position. The data suggest that the increase in D l with exercise stems primarily from an increase in capillary volume with minor alteration in exchange area. A change in capillary shape from an elliptical to a circular configuration is postulated to explain these results. Such a geometric change would provide an increase in volume without an increase in surface area.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
