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Diagnostic criteria for SIRS.
| SIRS | At least 2 symptoms are met |
|---|---|
| Symptom 1 | Body temperature >38°C or <36°C for two consecutive times |
| Symptom 2 | Heart rate >90 beats per minute |
| Symptom 3 | Respiratory rate >20 times/min or PaCO2 <32 mmhg |
| Symptom 4 | WBC >12 × 109/L or <4 × 109/L or immature cells >10% |
