Immediate Effects of Continuous Positive Pressure Breathing On Abdominal Expiratory Activity, Minute Ventilation, and End-Tidal PCO2 of Conscious Man
Open Access
- 1 March 1973
- journal article
- research article
- Published by Oxford University Press (OUP) in PTJ: Physical Therapy & Rehabilitation Journal
- Vol. 53 (3) , 258-266
- https://doi.org/10.1093/ptj/53.3.258
Abstract
Ventilatory responses of conscious man to continuous positive pressure breathing were studied by recording the integrated electromyogram of the external abdominal oblique muscle, tidal volume, and frequency of breathing and end-tidal Pco during +10, +20, and +30 cm H2O. Abdominal expiratory activity reflexly evoKea by the pressure breathing increased with the level of pressure and showed progressive recruitment throughout exposure to elevated pressure. Tidal volume and frequency of respiration were increased by the elevated pressure, thus making minute ventilation greater the higher the level of pressure. As a result of this increase in minute ventilation, end-tidal PCO2 decreased with each level of pressure breathing. Thus, man reflexly compensates for continuous overinflation of the lungs by active expiration and an increase in ventilation.Keywords
This publication has 0 references indexed in Scilit: