Fig. 2
From: Measuring lung mechanics of expiratory tidal breathing with non-invasive breath occlusion
QV loop of flow induced by shutter makes identification of shuttering easy. A linear region between points A and B defined by the lung’s response to shutter reopening, and a longer region at end-expiration are shown. Note: linearity in a QV loop suggests lung mechanics remain constant. The total volume induced by the shutter has been translated in this figure to have a minimum value of zero