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Table 3 Inherent characteristics of the devices affecting product delivery

From: COPD: adherence to therapy

  Breezhaler® Handihaler® Respimat® Genuair® Diskus® Turbohaler®
Intra-thoracic deposition 39%14 22%14 52%15 30%16 8-14%17 25-35%17
FPF 42.6% 9.8% 66%18 36,5% 14-24%17 44-46%17
Internal resistance 2.2x10-2kPa½ L-1min 5.1x10-2kPa½ L-1min Not applicable 3.5x10-2kPa½ L-1min 2.7x10-2 kPa½ L-1min 3.4 x10-2kPa½ L-1min
  1. FPF, Fine particle fraction; ®, trademark.