Table 2.

Differences in intrinsic resistance and in inspiratory flow rate through the device of some of most commonly used DPIs

	Inspiratory DPI resistance (kPa 0.5  L/min)	Inspiratory flow rate (L/min)
Breezhaler®	0.017	111
Aerolizer®	0-019	102
Ellipta®	0.027	74
Novolizer®	0.027	72
Accuhaler/Diskus®	0.027	72
Genuair®	0.031	64
Nexthaler®	0.036	54
Turbohaler®	0.039	54
Handihaler®	0.058	37

From [10].