CPAP cmH2O | Bronchoscope tip in pharynx | Bronchoscope tip in trachea | ||
0 | 0 | 5 | 10 | |
VT mL·kg−1 | 5.0±0.5 | 3.4±0.5* | 4.2±0.5 | 4.8±0.6 |
RR min−1 | 36±2 | 38±2 | 36±2 | 36±2 |
V′E mL·kg−1·min−1 | 176±17 | 121±13* | 144±14 | 157±15 |
PTEF mL·s−1 | 78±12 | 52±10* | 66±12 | 68±10 |
PTIF mL·s−1 | 98±15 | 66±12* | 82±13 | 90±13 |
Data are presented as mean±SE of 16 subjects. VT: tidal volume; RR: respiratory rate; V′E: expiratory minute ventilation; PTEF: peak tidal expiratory flow; PTIF: peak tidal inspiratory flow. *: values are significantly different compared with all other values in the same row (Bonferroni p>0.05). No significant differences were found among unmarked values in each row.