Table 3 Effects of modified high-flow tracheal oxygen on gas exchange and hemodynamics.
Normal | p | Injured | p | |||||
---|---|---|---|---|---|---|---|---|
T-piece | HFT | Modified HFT | T-piece | HFT | Modified HFT | |||
FiO2 | 0.77 ± 0.15 | 0.40 ± 0.02a | 0.41 ± 0.01a | 0.002 | 0.79 ± 0.13 | 0.41 ± 0.02a | 0.40 ± 0.02a | 0.001 |
PaO2 (mmHg) | 310 ± 120 | 173 ± 47a | 185 ± 37a | 0.019 | 214 ± 89 | 113 ± 32a | 125 ± 36a | 0.010 |
PaO2/FiO2 ratio | 412 ± 164 | 432 ± 119 | 457 ± 98 | 0.228 | 279 ± 115 | 276 ± 79 | 308 ± 77a,b | 0.038 |
PETCO2 (mmHg) | 39 ± 4 | 39 ± 4 | 40 ± 5 | 0.350 | 38 ± 5 | 40 ± 5 | 38 ± 3 | 0.307 |
PaCO2 (mmHg) | 50 ± 5 | 50 ± 2 | 50 ± 2 | 0.968 | 57 ± 3 | 53 ± 5 | 53 ± 2 | 0.316 |
Alveolar dead space fraction | 0.22 ± 0.10 | 0.21 ± 0.10 | 0.19 ± 0.07 | 0.701 | 0.33 ± 0.05 | 0.24 ± 0.07 | 0.28 ± 0.07 | 0.075 |
Mean arterial pressure (mmHg) | 119 ± 14 | 114 ± 13 | 116 ± 11 | 0.238 | 111 ± 25 | 112 ± 13 | 116 ± 16 | 0.737 |
Heart rate | 77 ± 21 | 68 ± 11 | 63 ± 8 | 0.371 | 73 ± 7 | 72 ± 7 | 66 ± 9a | 0.041 |