Table 1.

Classification of traumatic-hemorrhagic shock*

	Class 1	Class 2	Class 3	Class 4
Blood loss	< 750 cc	750-1,500 cc	1,500-2,000 cc	> 2,000 cc
Blood loss (% volume)	< 15%	15-40%	30-50%	> 40%
Heart rate	< 100/min	> 100/min	> 130/min	> 140/min
Blood pressure	Normal	Normal	Decreased	Decreased
Pulse pressure	Normal	Decreased	Decreased	Decreased
Respiratory rate	14–20/min	20–30/min	30–40/min	> 35/min
Urine output	> 30mL/hr	20–30/mL/hr	5–15/ml/hr	Negligible
Mental status	Normal	Anxious	Confused	Lethargic

*per ATLS® criteria [25]