Table 1. POP scale.
| Parameter | Score |
|---|---|
| 1. Miosis | |
| –Pupil size > 2mm | 0 |
| –Pupil size ≤ 2mm | 1 |
| –Pupils pin-point | 2 |
| 2. Fasciculation | |
| –None | 0 |
| –Present but not generalized or continuous | 1 |
| –Generalized and continuous | 2 |
| 3. Respiration | |
| –Respiratory rate ≤ 20/min | 0 |
| –Respiratory rate > 20/min | 1 |
| –Respiratory rate >20/min with central cyanosis | 2 |
| 4. Bradycardia | |
| –Pulse rate > 60/min | 0 |
| –Pulse rate 41–60/min | 1 |
| –Pulse rate ≤ 40/min | 2 |
| 5. Level of consciousness | |
| –Conscious and rational | 0 |
| –Impaired and responds to verbal command | 1 |
| –Impaired and does not respond to verbal command (add 1 if convulsion present) | 2 |
| Total score | 11 |
Abbreviation: POP, Peradeniya organophosphorus poisoning.