Table 4.
Changes in functional respiratory imaging parameters from exacerbation to stable state in 2 individual patients with similar changes in classical pulmonary function tests
| Parameters | Patient 1
|
Patient 2
|
||
|---|---|---|---|---|
| Baseline | Change (%) | Baseline | Change (%) | |
| FEV1 | 0.82 L | +7.32 | 0.77 L | +9.09 |
| iVawFRC | 32.41 mL | −6.29 | 7.37 mL | +95.72 |
| iVawTLC | 42.20 mL | +14.79 | 29.13 mL | +3.06 |
| FRC | 4.86 L | −9.88 | 2.92 L | +12.67 |
| iVlobeFRC | 201.13% predicted | −28.33 | 118.52% predicted | +4.87 |
| TLC | 6.22 L | −0.96 | 4.59 L | +3.92 |
| iVlobeTLC | 140.62% predicted | −6.14 | 95.35% predicted | +1.43 |
| Raw | 0.441 kPa·s/L | +20.18 | 1.060 kPa·s/L | −18.96 |
| iRawFRC | 0.05 kPa·s/L | +5.51 | 0.17 kPa·s/L | −89.90 |
| iRawTLC | 0.09 kPa·s/L | −51.35 | 0.05 kPa·s/L | −0.82 |
Abbreviations: FEV1, forced expiratory volume in 1 second; FRC, functional residual capacity; iRaw, airway resistance measured by FRI; iVaw, airway volume measured by FRI; iVlobe, lobar volume measured by FRI; Raw, airway resistance measured by plethysmography; TLC, total lung capacity.