Types of shock

Below is an outline of the ATLS classification of haemorrhagic shock:

Class of Shock	Blood Loss	Clinical Features
Type 1	15% or less <750ml	May have normal BP and heart rate Resp rate 12 to 20
Type 2	15 to 30% 750 to 1500ml	Pulse 100 to 120 Resp rate 20 to 30 Normal BP typically
Type 3	30 to 40% 1.5 to 2 litres	Pulse 120 to 140 Urine output 5-15mls/hr Resp rate >30 Hypovolaemic May have signs agitation
Type 4	More than 40% More than 2 litres	Pulse >140 Resp rate >35 Hypovolaemic Likely drowsy, confused, possible loss of consciousness May be anuric