Abstract
The effects of breathing increased concentrations of oxygen (FI0₂ of 0.6 to 1.0) on the pulmonary compliance and pulmonary resistance were examined in normal, seated males. Exposures were for one hour and volume history of the lungs was established a t 10 minute intervals. There were no significant changes in any of the parameters examined. In addition, the effects of breathing increased oxygen concentrations (FI0₂'s of 0.6 to 0.8) and exposure to increased acceleration forces (+5Gz for 120 seconds and +7Gz for 45 seconds) on pulmonary compliance and resistance were examined in normal, seated males. Pulmonary compliance decreased significantly in subjects breathing the increased FI0₂'s after exposure to acceleration forces when compared to room air controls. The decrease in compliance appeared to be a function of the FI0₂, with those subjects breathing the greater FI0₂ showing a greater decrease in compliance than those subjects breathing the lesser FI0₂. There was no significant difference in the degree of compliance decrease between the two acceleration levels for a particular FI0₂. The pulmonary compliance showed a gradual return towards the pre-acceleration exposure level during the 15 minute interval between acceleration force exposures.
Bush, Larry Todd (1976). The effects of increased oxygen concentrations and acceleration forces on the mechanical properties of the lungs. Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -613882.