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. 2011 Jun 23;6:353–363. doi: 10.2147/COPD.S18529

Table 1.

Patient demographics and derived inhalation variables through the two inhalers

Patient no. Age (yr) Gender FEV1 (% pred.) COPD DP (cmH2O)
PIF (L/minute)
IV (L)
IT (seconds)
BH HH BH HH BH HH BH HH
1 74 Male 69 Moderate 24 31 80 34 2.2 1.9 2.5 6.3
2 69 Male 39 Severe 35 58 97 47 2.1 1.6 1.9 3.0
3 79 Male 58 Moderate 8 14 47 23 1.3 1.5 3.0 6.1
4 70 Female 74 Moderate 9 15 48 24 1.7 1.4 3.2 5.0
5 52 Female 68 Moderate 37 44 99 41 2.0 1.8 1.7 3.8
6 76 Female 66 Moderate 15 34 64 36 1.0 1.3 1.3 3.1
7 71 Female 49 Severe 19 61 72 48 1.8 1.5 2.0 2.3
Average 70 – 60 – 21 37 72 36 1.7 1.6 2.2 4.2

Abbreviations: FEV1, forced expiratory volume in 1 s; DP, pressure drop across inhaler; PIF, peak inspiratory flow; IV, inhaled volume; IT, inhalation time; BH, Breezhaler; HH, HandiHaler; yr, years.