Results (X ± SD)
T-ring L/minBlender Fi02FiO2 (direct connection)FiO2 (tracheostomy mask)
0.210.211 ± 0.10.21 ± 0.3
0.500.46 ± 0.1*0.418 ± 0.7
01.00.881 ± 0.9*#0.789 ± 0.9#
1.210.286 ± 0.40.29 ± 0.3
1.500.524 ± 0.1*0.508 ± 0.3
11.00.882 ± 0.9*#0.83 ± 1.7#
2.210.347 ± 0.40.372 ± 0.2*
2.500.549 ± 0.50.539 ± 1.3
21.00.877 ± 1.4*#0.846 ± 1.2#
3.210.41 ± 0.40.442 ± 0.4*
3.500.615 ± 0.1*&0.598 ± 0.3
31.00.877 ± 0.3#0.89 ± 2.8#
4.210.458 ± 0.80.513 ± 0.5*
4.500.615 ± 0.80.613 ± 0.7
41.00.869 ± 1.5*#0.832 ± 2.3#
  • *> than other interface (p < .05). #No difference with addition of t-ring flow (p < .0001). &No difference with increasing t-ring flow (p < .0001)