Fig. 4.

Single breath test for CO₂ from a representative patient (n° 2) with and without pause recorded at the end of initial period of zero pause (Tp0_init, continuous line) and after 10 and 30 min at Tp20, (dotted and interrupted lines, respectively). At Tp0_init, airway dead space (V_Daw, vertical lines) was larger and the slope of the alveolar plateau steeper, while the area within the loop representing VtCO₂ was smaller.