Table 3 Inherent characteristics of the devices affecting product delivery

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^-2kPa_½ L^-1min

5.1x10^-2kPa_½ L^-1min

Not applicable

3.5x10^-2kPa_½ L^-1min

2.7x10^-2 kPa_½ L^-1min

3.4 x10^-2kPa_½ L^-1min