Figure 3From: Inhalation characteristics of asthma patients, COPD patients and healthy volunteers with the Spiromax® and Turbuhaler® devices: a randomised, cross-over studyIndividual peak inspiratory flow rates (A), maximum pressure change (ΔP) (B) and inhalation volume (C) before enhanced training. In graph (A), the horizontal dotted line represents 30 L/min (minimal flow for adequate drug delivery).Back to article page