Table 1 Asthma study: inspiratory flow profile from acoustic monitoring
Asthma control | Total (N = 40) | ||
|---|---|---|---|
Controlled (N = 20) | Partly controlled/ uncontrolled (N = 20) | ||
Flow at BAM firing, L/min | |||
First inhalation | 35.4 ± 9.5 (16.3–52.3) | 34.5 ± 8.6 (23.1–50.4) | 35.0 ± 9.0 (16.3–52.3) |
Second inhalation | 34.6 ± 9.2 (14.4–50.8) | 36.2 ± 9.0 (18.0–53.6) | 35.4 ± 9.0 (14.4–53.6) |
PIF, L/min | |||
First inhalation | 70.5 ± 28.2 (39.9–123.9) | 58.8 ± 20.1 (35.0–123.3) | 64.6 ± 24.9 (35.0–123.9) |
Second inhalation | 72.1 ± 25.6 (42.1–117.6) | 63.0 ± 16.8 (44.2–117.4) | 67.6 ± 21.9 (42.1–117.6) |
Time to BAM firing, s | |||
First inhalation | 0.06 (0.02–0.50) | 0.08 (0.03–0.50) | 0.07 (0.02–0.50) |
Second inhalation | 0.07 (0.02–0.41) | 0.08 (0.03–0.18) | 0.07 (0.02–0.41) |
Time to PIF, s | |||
First inhalation | 0.47 (0.32–1.18) | 0.50 (0.35–2.34) | 0.48 (0.32–2.34) |
Second inhalation | 0.46 (0.32–1.40) | 0.56 (0.36–1.22) | 0.48 (0.32–1.40) |
Total inhalation time, s | |||
First inhalation | 1.93 (0.39–3.62) | 1.80 (0.78–4.09) | 1.83 (0.39–4.09) |
Second inhalation | 2.00 (0.49–3.49) | 1.68 (0.67–3.54) | 1.82 (0.49–3.54) |
Total inhaled volume, L | |||
First inhalation | 1.73 ± 0.96 (0.23–4.09) | 1.39 ± 0.55 (0.50–2.67) | 1.56 ± 0.79 (0.23–4.09) |
Second inhalation | 1.68 ± 0.84 (0.28–3.89) | 1.39 ± 0.55 (0.45–2.63) | 1.53 ± 0.72 (0.28–3.89) |