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Table 1 Classification of hypovolemic shock based on the shock index [6]

From: Is the shock index based classification of hypovolemic shock applicable in multiple injured patients with severe traumatic brain injury?—an analysis of the TraumaRegister DGU®


Class I

Class II

Class III

Class IV


no shock

mild shock

moderate shock

severe shock

SI at admission


≥0.6 to <1

≥1 to <1.4


Need of blood products


Consider use of blood products

Prepare transfusion

Prepare massive transfusion