Template:Hemorrhagic shock classes

Classes of hemorrhagic shock

Class	I	II	III	IV
Approximate blood loss	<15%	15-30%	30-40%	>40%
Heart rate	↔	↔/↑	↑	↑↑
Blood pressure	↔	↔	↔/↓	↓
Pulse Pressure (mmHg)	↔	↓	↓	↓
Respiratory Rate (per min)	↔	↔	↔/↑	↑
Urine Output (mL/hr)	↔	↔	↓	↓↓
Glasgow coma scale score	↔	↔	↓	↓
Base deficit^	0 to -2 mEq/L	-2 to -6 mEq/L	-6 to -10 mEq/L	-10 or less mEq/L
Need for blood products	Monitor	Possible	Yes	Massive transfusion protocol

^Base excess is the quantity of base (HCO3-, in mEq/L) that is above or below the normal range in the body. A negative number is called a base deficit and indicates metabolic acidosis.