Patient factor | Effect on preoxygenation | |
Efficacy* | Efficiency¶ | |
Obesity:
| ↓ | ↓ |
Pregnancy:
| ↓ | ↓ |
Very young age:
| Faster preoxygenation | ↓↓Δ |
Older adults:
| Slower, less effective preoxygenation | ↓ |
Critically ill; varies:
| Slower, less effective preoxygenation | ↓↓ |
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