| CaO2 | Arterial concentration of oxygen |
| FiO2 | Fraction of inspired oxygen |
| GPx | Glutathione peroxidase |
| GSH | Glutathione (reduced form) |
| GS-SG | Glutathione (oxidized form) |
| Hb | Hemoglobin |
| HbSSG | Glutathionyl hemoglobin |
| MDA | Malondialdehyde |
| NOx | Nitrites and nitrates |
| O2 | Oxygen |
| PaO2 | Arterial partial pressure of oxygen |
| RBCs | Red blood cells |
| RNS | Reactive Nitrogen Species |
| ROS | Reactive Oxygen Species |
| SpO2 | Peripheral saturation of oxygen |