Score | Respiratory rate | Wheezing | Inspiratory/ expiratory ratio | Accessory muscle use | Oxygen saturation | |
<6 years old | ≥6 years old | |||||
0 | ≤30 | ≤20 | None* | 2:1 | None | 99 to 100 |
1 | 31 to 45 | 21 to 35 | End expiration | 1:1 | + | 96 to 98 |
2 | 46 to 60 | 36 to 50 | Entire expiration | 1:2 | ++ | 93 to 95 |
3* | >60 | >50 | Inspiration and expiration | 1:3 | +++ | <93 |
However, the PIS may underestimate the degree of illness in an older child. Older children, with prolonged expiratory phases, may become bradypneic with a moderate-to-severe attack. As such, their score for respiratory rate may be falsely reassuring.
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