Table 2.
Ventilator and Respiratory Parameters during Proning
| N = 309 | T1 | T2 | T3 | T4 |
|---|---|---|---|---|
| Prone Episode Duration, h | 23 (14 – 49) | |||
| I/O from Intubation, mL | 1600 (200 – 5000) | 2500 (200 – 6500) | ||
| I/O from Admission, mL | 1800 (-500 – 6000) | 2800 (-300 – 7500) | ||
| PEEP, cm H2O | 12 (10 – 14) | 12 (10 – 14) | 12 (10 – 14) | 12 (10 – 14) |
| FiO2 | 70 (60 – 100) | 70 (60 – 100) | 60 (50 – 80) | 60 (50 – 80) |
| Tidal Volume, mL | 420 (360 – 460) | 400 (360 – 450) | 400 (360 – 460) | 400 (360 – 460) |
| Respiratory Rate | 24 (20 – 28) | 24 (20 – 28) | 25 (20 – 30) | 25 (20 – 30) |
| Plateau Pressure, cm H2O | 28 (25 – 30) | 28 (25 – 30) | 27 (25 – 29) | 28 (25 – 30) |
| Static Compliance, mL/cm H2O | 26 (22 – 33) | 27 (22 – 32) | 29 (23 – 33) | 26 (21 – 32) |
| Driving Pressure, cm H2O | 15 (13 – 19) | 15 (12 – 18) | 15 (12 – 18) | 15 (13 – 19) |
| pH | 7.34 (7.29 – 7.4) | 7.35 (7.29 – 7.4) | 7.35 (7.29 – 7.4) | 7.35 (7.28 – 7.4) |
| PaO2, mm Hg | 78 (67 – 101) | 79 (67 – 101) | 83 (70 – 07) | 83 (71 – 107) |
| PaCO2, mm Hg | 47 (41 – 54) | 47 (42 – 55) | 48 (43 – 55) | 48 (42 – 55) |
| PaO2/FiO2, mm Hg | 115 (80 – 148) | 114 (86 – 156) | 140 (93 – 205) | 137 (95 – 197) |
*T1: Supine prior to prone; T2: start of prone; T3: end of prone; T4: after return to supine