Parameters:
(1) baseline systolic blood pressure in mm Hg
(2) current systolic blood pressure in mm Hg
(3) urine output in mL per minute
(4) body weight in kilograms
(5) baseline heart rate in beats per minute
(6) current heart rate in beats per minute
(7) skin mottling
(8) serum lactate concentration in mmol/L
Hypoperfusion was diagnosed if any of the following are present:
(1) current systolic blood pressure <= 90 mm Hg
(2) drop in systolic blood pressure >= 20% from baseline
(3) urine output <0.5 mL per kg per minute for more than 2 hours
(4) increase in heart rate to >= 110% of baseline
(5) skin mottling
(6) serum lactate concentration > 2 mmol/L (hyperlactatemia)
