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Table 1 Classification of hypovolemic shock based on the shock index [6]
| Class I | Class II | Class III | Class IV | |
|---|---|---|---|---|
| Shock | no shock | mild shock | moderate shock | severe shock |
| SI at admission | <0.6 | ≥0.6 to <1 | ≥1 to <1.4 | ≥1.4 |
| Need of blood products | Observe | Consider use of blood products | Prepare transfusion | Prepare massive transfusion |
