Table 2.
Comparison of ventilator parameters between survivors and nonsurvivors during prone day 1 to 4
| Day 1 |
Day 2 |
Day 3 |
Day 4 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surv.(n = 16) | NS (n = 27) | P | Surv. (n = 11) | NS (n = 17) | P | Surv. (n = 8) | NS (n = 9) | P | Surv (n = 4) | NS (n = 5) | P | |
| Tidal volume (mL ± SD) | 460 ± 70 | 480 ± 110 | 0.65 | 460 ± 70 | 470 ± 100 | 0.79 | 450 ± 50 | 480 ± 140 | 0.50 | 440 ± 70 | 460 ± 8 | 0.69 |
| PEEP (cm H2O ± SD) | 12 ± 2 | 14 ± 4 | 0.15 | 13 ± 2 | 13 ± 4 | 0.88 | 14 ± 3 | 11 ± 3 | 0.10 | 14 ± 3 | 11 ± 4 | 0.19 |
| Plateau pressure (cm H2O ± SD) | 28 ± 7 | 31 ± 6 | 0.13 | 29 ± 5 | 31 ± 5 | 0.21 | 29 ± 7 | 33 ± 4 | 0.16 | 26 ± 7 | 31 ± 4 | 0.12 |
| Driving pressure (cm H2O ± SD) | 16 ± 5 | 17 ± 7 | 0.76 | 16 ± 6 | 18 ± 6 | 0.31 | 15 ± 7 | 22 ± 6 | 0.06 | 11 ± 5 | 20 ± 5 | 0.02 |
| Hours on prone (h ± SD) | 21 ± 5 | 17 ± 8 | 0.15 | 21 ± 4 | 16 ± 7 | 0.26 | 19 ± 9 | 15 ± 9 | 0.68 | 19 ± 10 | 18 ± 8 | 0.80 |
All values in the table represent the average value in the prone position for each intensive care unit day during a 24-hour period running from 7:00 AM to 6:59 AM. Surv. indicates survivors; NS, nonsurvivors; PEEP, positive-end expiratory pressure; SD, standard deviation.