UAO (n= 7) | Spontaneous breathing | Clinical CPAP | Physiological CPAP | Physiological CPAP+1 cmH2O |
---|---|---|---|---|
Respiratory parameters | ||||
f R (breaths/min) | 46 ± 16b | 36 ± 19 | 34 ± 17 | 32 ± 20 |
T I /T TOT | 0.6 ± 0.1b | 0.5 ± 0.1 | 0.4 ± 0.1 | 0.4 ± 0.1 |
Respiratory muscle output | ||||
Poes swing (cmH2O) | 30 ± 17b | 18 ± 10 | 12 ± 6 | 16 ± 7 |
Pdi swing (cmH2O) | 25 ± 9b | 20 ± 10c | 14 ± 7 | 17 ± 8 |
Pgas swing (cmH2O) | 5 ± 2b | 3 ± 1 | 3 ± 1 | 3 ± 1 |
Expiratory Pgas swing (cmH2O) | 1 ± 2 | 1 ± 1 | 1 ± 1 | 2 ± 2 |
PTPoes/breath (cmH2O/s) | 13 ± 7 | 10 ± 8 | 7 ± 6 | 11 ± 10 |
PTPdi/breath (cmH2O/s) | 12 ± 5 | 11 ± 7 | 7 ± 5 | 10 ± 7 |
PTPoes/min (cmH2O/s/min) | 599 ± 415b | 291 ± 162 | 201 ± 150 | 271 ± 188 |
PTPdi/min (cmH2O/s/min) | 459 ± 155b | 332 ± 161c | 212 ± 135 | 262 ± 193 |
CPAP level (cmH2O) | NA | 9 ± 1 | 11 ± 2 | 12 ± 2 |
BPD ( n = 5) | Spontaneous Breathing | Clinical CPAP | Physiological CPAP | Physiological CPAP+1 cmH 2 O |
Respiratory parameters | ||||
f R (breaths/min) | 54 ± 6 | 56 ± 18 | 45 ± 13 | 46 ± 11 |
T I /T TOT | 0.4 ± 0.0 | 0.4 ± 0.0 | 0.4 ± 0.1 | 0.4 ± 0.1 |
Respiratory muscle output | ||||
Poes swing (cmH2O) | 32 ± 11d | 25 ± 11c | 10 ± 2 | 11 ± 2 |
Pdi swing (cmH2O) | 27 ± 9d | 20 ± 5c | 11 ± 4 | 11 ± 1 |
Pgas swing (cmH2O) | 2 ± 1 | 2 ± 1 | 2 ± 1 | 2 ± 0 |
Expiratory Pgas swing (cmH2O) | 7 ± 4 | 7 ± 6 | 1 ± 1 | 1 ± 1 |
PTPoes/breath (cmH2O/s) | 10 ± 4d | 9 ± 4c | 4 ± 2 | 4 ± 2 |
PTPdi/breath (cmH2O/s) | 9 ± 4 | 7 ± 3 | 5 ± 2 | 3 ± 0 |
PTPoes/min (cmH2O/s/min) | 526 ± 201d | 468 ± 290c | 156 ± 43 | 181 ± 43 |
PTPdi/min (cmH2O/s/min) | 442 ± 153 | 379 ± 183 | 183 ± 50 | 156 ± 0 |
CPAP level (cmH2O) | NA | 7 ± 1 | 9 ± 1 | 10 ± 1 |