Derivation of pulmonary index score for asthma severity
| Score | Pulse rate (beats/min) | Resp rate | Wheeze | Access muscles | Sao 2(%) | PEFR (% Pred) |
| 1 | <120 | <40 | None or end expiratory | +/None | 96–100 | >70 |
| 2 | 120–140 | 40–50 | Throughout expiration | ++ | 92–95 | 70–50 |
| 3 | >140 | >50 | Inspiration and expiration | +++ | <92 | <50 |
Score of 1–3 assigned for each clinical measurement or observation. Maximum score = 18. Minimum score (no signs or symptoms) = 6.
Resp, respiration; Access, accessory; PEFR, peak expiratory flow rate; Pred, prednisolone.