Oxygen therapy aims to maintain adequate tissue oxygenation and correct hypoxemia. The delivery method is selected based on the required Fraction of Inspired Oxygen (
| Device | Approx. |
Clinical Use |
|---|---|---|
| Nasal Cannula | 24% – 44% | Low-flow, comfortable, suitable for stable patients. |
| Simple Face Mask | 40% – 60% | Moderate oxygen requirement. |
| Venturi Mask | 24% – 60% | Precise, fixed delivery; ideal for COPD. |
| Non-Rebreather Mask | 60% – 90%+ | High-flow; emergency use for severe hypoxemia. |
High-Yield Clinical Notes:
- Hypoxic Drive: In chronic hypercapnic respiratory failure (e.g., severe COPD), excessive oxygen can reduce the respiratory drive; monitor
and target a lower
(88%–92%).
- Safety: Oxygen supports combustion. Ensure no open flames or sparking equipment near the oxygen source.
- Humidification: Highly recommended for flow rates
to prevent drying of the nasal mucosa and thickening of secretions.
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