Inspiratory Flows and Volumes in Subjects with Cystic Fibrosis Using a New Dry Powder Inhaler Device

Fig. (3) Mean (+SEM) inspiratory flows following inhalation through the high resistance inhaler in 25 cystic fibrosis subjects overall and grouped by FEV₁. PIF - Peak inspiratory flow, IF25 - Inspiratory flow at 25% inspiratory volume, IF50 - Inspiratory flow at 50% inspiratory volume, IF75 - Inspiratory flow at 75% inspiratory volume.