SIRS is defined by the presence of ≥2 of the following:
1. Fever >38°C or <36°C
2. HR >90 bpm
3. RR >20/min or PaCO₂ <32 mmHg
4. Abnormal WBC count (>12,000/μL or <4,000/μL).
SIRS is defined by the presence of ≥2 of the following:
1. Fever >38°C or <36°C
2. HR >90 bpm
3. RR >20/min or PaCO₂ <32 mmHg
4. Abnormal WBC count (>12,000/μL or <4,000/μL).