Figure 2. Effect of gradual lung inflation on the pressure changes produced by isolated spontaneous diaphragm contraction.

Mean ± s.e.m. changes in airway opening pressure (ΔP_ao) and abdominal pressure (ΔP_ab) obtained in seven animals during occluded breaths at different lung volumes. The values in the different animals were determined at fixed transrespiratory pressures at 2.5 cmH₂O increments by interpolation.