TABLE 3.
FEV1* (L) |
FVC (L) |
FEV1/FVC |
||||
Patient Type, Treatment | Before | During | Before | During | Before | During |
Asthma | ||||||
RA | 3.52 ± 0.29 | 3.44 ± 0.30 | 4.35 ± 0.46 | 4.43 ± 0.46 | 82.33 ± 3.24 | 78.67 ± 3.42* |
HA | 3.45 ± 0.32 | 3.04 ± 0.21* | 4.30 ± 0.46 | 4.29 ± 0.41 | 81.17 ± 2.94 | 71.67 ± 2.36* |
Healthy | ||||||
RA | 4.27 ± 0.32 | 4.44 ± 0.49 | 5.39 ± 0.65 | 5.31 ± 0.65 | 81.20 ± 4.41 | 81.60 ± 4.72 |
HA | 4.43 ± 0.48 | 4.48 ± 0.55 | 5.43 ± 0.72 | 5.43 ± 0.71 | 83.40 ± 4.37 | 83.40 ± 3.83 |
Definition of abbreviations: HA = humidified air at high temperature; RA = humidified air at room temperature.
Forced expiratory tests were performed before and at ∼8 min after the hyperventilation challenge in patients with asthma (n = 6) and healthy subjects (n = 5; the test was not done after HA in one subject).
†Significant difference (P < 0.05; paired t test) between before and after the hyperventilation challenge.