Patients showing a fall in SpO2 and requiring supplemental oxygen during FB
| FEV1 in litres | Patients with SpO2<90% (%) | Patients requiring supplemental oxygen (%) |
|---|---|---|
| <0.5 | 93 | 71 |
| 0.51–1.0 | 48 | 32 |
| 1.01–1.5 | 25 | 14 |
| 1.51–2.0 | 17 | 8 |
| >2.0 | 10 | 5 |
Adapted from Jones and O'Driscoll21
FEV1, forced expiratory volume in 1 s; SpO2, pulse oximeter oxygen saturation.