Ventilatory indexes in fentanyl and control groups
| Basal | At 24 hours | At 48 hours | At 72 hours | |
|---|---|---|---|---|
| FIO2 | ||||
| Fentanyl group | 52 (20) | 42 (22) | 38 (12) | 29 (10) |
| Control group | 44 (21) | 35 (12) | 36 (15) | 26 (6) |
| p value | NS | NS | NS | NS |
| PIP | ||||
| Fentanyl group | 23 (4) | 21 (4) | 21 (3) | 19 (2) |
| Control group | 21 (3) | 19 (3) | 20 (1) | 19 (2) |
| p value | NS | NS | NS | NS |
| IMV rate | ||||
| Fentanyl group | 37 (9) | 30 (11) | 34 (14) | 31 (10) |
| Control group | 35 (1) | 27 (10) | 27 (9) | 26 (25) |
| p value | NS | NS | NS | NS |
FIO2, fraction of inspired oxygen; PIP, peak inspiratory pressure; IMV, intermittent mandatory ventilation.