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Table 3 Mean (FNO), inspiratory (FINO) and expiratory (FENO) intratracheal NO concentrations, mean NO2 intratracheal concentrations and methemoglobin (MetHb) blood levels measured in 16 patients with ARDS receiving increasing concentrations of inhaled NO at FiO2 0.85
| NO (ppm) | |||||||
|---|---|---|---|---|---|---|---|
| 0.15 | 0.45 | 1.5 | 4.5 | 15 | 45 | 150 | |
| FNO (ppm) | 0.102 ± 0.004 | 0.32 ± 0.011 | 1.05 ± 0.02 | 2.98 ± 0.06 | 10.4 ± 0.2 | 26 ± 0.8 | 100 ± 4 |
| FINO (ppm) | 0.15 ± 0.006 | 0.45 ± 0.073 | 1.5 ± 0.2 | 4.5 ± 0.3 | 15.3 ± 1.2 | 45.2 ± 0.9 | nd |
| FENO (ppm) | 0.004 ± 0.0005 | 0.1 ± 0.02 | 0.6 ± 0.05 | 1.95 ± 0.1 | 6 ± 0.2 | 17 ± 0.9 | nd |
| NO2 (ppm) | 0.02 ± 0.004 | 0.03 ± 0.01 | 0.03 ± 0.01 | 0.06 ± 0.02 | 0.3 ± 0.1 | 0.8 ± 0.3 | 4 ± 0.9 |
| MetHb (%) | 0.9 ± 0.1 | 1 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 1 ± 0.1 | 1.4 ± 0.2 | 3.8 ± 0.5 |
