Mechanisms of hypoxaemia and clinical examples
| Category | Examples |
|---|---|
| Reduced atmospheric oxygen (patmosO2) | Altitude |
| Alveolar hypoventilation | Airways disease, neuromuscular disease etc |
| Pulmonary ventilation/perfusion mismatch | Pneumonia, pulmonary embolism etc |
| Diffusion limitation | Interstitial oedema or inflammation |
| Shunt | Atrial septal defect, tetralogy of Fallot etc |
| Reduced mixed venous oxygen (pvO2) | Cardiogenic or hypovolaemic shock |