1. Flow–volume loops of test breaths and preceding control breaths of three representative chronic obstructive pulmonary disease patients with different degrees of flow limitation: a) not flow limited, b) flow limited over less than 50% of tidal volume (VT) an...
Flow–volume loops of test breaths and preceding control breaths of three representative chronic obstructive pulmonary disease patients with different degrees of flow limitation: a) not flow limited, b) flow limited over less than 50% of tidal volume (VT) and c) flow limited from peak expiratory flow. Arrows indicate points at which negative expiratory pressure (NEP) was applied and removed. Reproduced and modified from [11] with permission from the publisher.
N.G. Koulouris, and G. Hardavella Eur Respir Rev 2011;20:
©2011 by European Respiratory Society