Cardiovascular parameters
Blood loss	Heart rate	Blood pressure	Capillary refill	Respir. rate	Urine volume	Mental state
Up to 750 ml	< 100	Normal	Normal	Normal	> 30 ml/hour	Normal
750–1500 ml	> 100	Systolic normal	Positive	20-30	20-30	Mild concern
1500–2000 ml	> 120	Decreased	Positive	30–40	5–15	Anxious/ confused
More than 2000 ml	> 140	Decreased	Positive	> 40	< 10	Confused/ coma