Fig. 2
From: Tidal volumes during delivery room stabilization of (near) term infants
Shows flow and pressure wave forms as an example for inadequate ventilation (A), appropriate ventilation (B) and excessive ventilation (C). A1 shows inadequate ventilation due to obstruction: although pressure is applied, there is almost no airflow. A2 shows inadequate ventilation due to mask leak: there is very little airflow coming back during expiration. B is an example of appropriate ventilation: there is no leak and VTe is in the target range. C shows excessive ventilation