Aetiology of hypoxaemia
Possible causes of hypoxaemia include:
- cardio-respiratory disorders
- hypoventilation
- a mismatch of ventilation-perfusion
- venous to arterial shunt
- diffusion impairment
- low inspired O2 e.g. high altitude
- a pathological desaturation of venous blood e.g. may rarely be caused by carboxyhaemoglobin
Reference
- Sarkar M. Mechanisms of hypoxaemia. Lung India. 2017 Mar-Apr;34(2):220
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