Table 1. Stage classification of hemorrhagic shock committee on trauma advanced trauma life support (ATLS) [2004]. American College of Surgeons, Chicago, 7th edition (12).
| Symptoms | Stage I | Stage II | Stage III | Stage IV |
|---|---|---|---|---|
| Blood loss (% blood volume) | 15 | 15–30 | 30–40 | >40 |
| Blood loss (mL) | 750 | 50–1,500 | 1,500–2,000 | >2,000 |
| Heart rate (1/min) | <100 | >100 | >120 | >140 |
| Blood pressure (mmHg) | Normal | Normal | Reduced | Reduced |
| Breathing rate (1/min) | 14–20 | 20–30 | 30–40 | >35 |
| Consciousness | Low restlessness | Moderate restlessness | High grade restlessness, disorientation | Disorientation, lethargy |